| Abstract | Substantial increases in fluorescence emission from fluorophore-protein-coated fractal-like silver structures have been observed. We review two methods for silver fractal structure preparation, which have been employed and studied. The first, a roughened silver electrode, typically yielded a 100-fold increase in fluorophore emission, and the second, silver fractal-like structures grown on glass between two silver electrodes, produced a [ap]500-fold increase. In addition, significant increases in probe photostability were observed for probes coated on the silver fractal like structures. These results further serve to compliment our recent work on the effects of nobel metal particles with fluorophores, a relatively new phenomenon in fluorescence we have termed both 'metal-enhanced fluorescence' [1] and 'radiative decay engineering' [2,3]. These results are explained by the metallic surfaces modifying the radiative decay rate ([Gamma]) of the fluorescent labels. We believe that this new silver-surface preparation, which results in ultrabright and photostable fluorophores, offers a new generic technology platform for increased fluorescence signal levels, with widespread potential applications to the analytical sciences, imaging, and medical diagnostics. |
| Subject | |
|
Topic |
Metal-enhanced fluorescence |
|
Topic |
radiative decay engineering |
|
Topic |
fractal silver structures |
|
Topic |
increased photostabilities |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Fluorescence |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
13 |
|
Part Detail:issue |
|
|
Part Number |
3 |
|
Extent(unit="pages") |
|
|
Start |
297 |
|
End |
276 |
|
Genre(marcgt) |
periodical |
| Identifier | ged03a |
| Identifier:DOI | 10.1023/A:1025046101335 |
| Location | |
|
URL |
http://dx.doi.org/10.1023/A:1025046101335 |
| Title Information | |
|
Title |
Fluorescence Spectral Properties of Indocyanine Green on a Roughened Platinum Electrode: Metal-Enhanced Fluorescence |
| Name:Personal | |
|
Name Part:given |
Chris D. |
|
Name Part:family |
Geddes |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Alexandr |
|
Name Part:family |
Parfenov |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
David |
|
Name Part:family |
Roll |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Md. Jamal |
|
Name Part:family |
Uddin |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Joseph R. |
|
Name Part:family |
Lakowicz |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The interactions of fluorophores with noble metal particles can modify their emission spectral properties, a relatively new phenomenon in fluorescence. We subsequently examined indocyanine green (ICG), which is widely used in medical testing and imaging, in close proximity to an electrically roughened platinum electrode. The emission intensity and lifetimes were decreased about 2-fold on the roughened surface as compared to a smooth Pt surface, and the photostability about the same. Platinum does not appear promising for metal enhanced fluorescence, at least for long wavelength fluorophores. |
| Subject | |
|
Topic |
Roughened platinum electrode |
|
Topic |
metal-enhanced fluorescence |
|
Topic |
radiative decay engineering |
|
Topic |
indocyanine green |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Fluorescence |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
13 |
|
Part Detail:issue |
|
|
Part Number |
6 |
|
Extent(unit="pages") |
|
|
Start |
453 |
|
End |
457 |
|
Genre(marcgt) |
periodical |
| Identifier | ged03b |
| Identifier:DOI | 10.1023/B:JOFL.0000008055.22336.0b |
| Location | |
|
URL |
http://dx.doi.org/10.1023/B:JOFL.0000008055.22336.0b |
| Title Information | |
|
Title |
Metal-dielectric composite filters with controlled spectral windows of transparency. |
| Name:Personal | |
|
Name Part:given |
Dentcho A. |
|
Name Part:family |
Genov |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Andrey K. |
|
Name Part:family |
Sarychev |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Vladimir M. |
|
Name Part:family |
Shalaev |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | In this report we show the possibility of broadband low-pass filters with windows of transparency in pre-set spectral ranges. Those filters are based on the unique optical properties of metal-dielectric composites near the percolation threshold. In such composites, metal clusters of different sizes and shapes have different plasmon resonances and resonate nearly independently at different wavelengths. All together, the resonant plasmon modes cover a very broad spectral range. Applying the effect of spectrally selective photo-modification, we develop a procedure that creates mid-infrared windows of transparency within the broadband filters. We also investigate the possibilities of making low-pass filters composed of spheroids and conductive sticks with certain distributions of aspect ratios. |
| Subject | |
|
Topic |
PHYSICAL sciences |
|
Topic |
SURFACE plasmon resonance |
|
Topic |
OPTICAL properties |
|
Topic |
Photomodification |
|
Topic |
absorption |
|
Topic |
semi-continuous films |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Nonlinear Opt. Phys. Mater. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
12 |
|
Part Detail:issue |
|
|
Part Number |
4 |
|
Extent(unit="pages") |
|
|
Start |
419 |
|
End |
440 |
|
Identifier:ISSN |
02188635 |
|
Genre(marcgt) |
periodical |
| Identifier | gen03 |
| Location | |
|
URL |
http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=11843227&site=ehost-live |
| Title Information | |
|
Title |
Synthesis and Properties of Biocompatible Water-Soluble Silica-Coated CdSe/ZnS Semiconductor Quantum Dots |
| Name:Personal | |
|
Name Part:given |
Daniele |
|
Name Part:family |
Gerion |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Fabien |
|
Name Part:family |
Pinaud |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Shara C. |
|
Name Part:family |
Williams |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Wolfgang J. |
|
Name Part:family |
Parak |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Daniela |
|
Name Part:family |
Zanchet |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Shimon |
|
Name Part:family |
Weiss |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
A. Paul |
|
Name Part:family |
Alivisatos |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We describe the synthesis of water-soluble semiconductor nanoparticles and discuss and characterize their properties. {H}ydrophobic {C}d{S}e/{Z}n{S} core/shell nanocrystals with a core size between 2 and 5 nm are embedded in a siloxane shell and functionalized with thiol and/or amine groups. {S}tructural characterization by {AFM} indicates that the siloxane shell is 1-5 nm thick, yielding final particle sizes of 6-17 nm, depending on the initial {C}d{S}e core size. {T}he silica coating does not significantly modify the optical properties of the nanocrystals. {T}heir fluorescence emission is about 32-35 nm fwhm and can be tuned from blue to red with quantum yields up to 18\%, mainly determined by the quantum yield of the underlying {C}d{S}e/{Z}n{S} nanocrystals. {S}ilanized nanocrystals exhibit enhanced photochemical stability over organic fluorophores. {T}hey also display high stability in buffers at physiological conditions (>150 m{M} {N}a{C}l). {T}he introduction of functionalized groups onto the siloxane surface would permit the conjugation of the nanocrystals to biological entities. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Phys. Chem. B |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
105 |
|
Part Detail:issue |
|
|
Part Number |
37 |
|
Extent(unit="pages") |
|
|
Start |
8861 |
|
End |
8871 |
|
Genre(marcgt) |
periodical |
| Identifier | ger01 |
| Identifier:DOI | 10.1021/jp0105488 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/jp0105488 |
| Title Information | |
|
Title |
Dependence of the Amplification of Giant Raman Scattering and Fluorescence on the Distance between an Adsorbed Molecule and a Metal Surface |
| Name:Personal | |
|
Name Part:given |
A. E. |
|
Name Part:family |
German |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
G. A. |
|
Name Part:family |
Gachko |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We have studied the effect of the long-range amplification of secondary radiation of the molecules of oxazine 1 adsorbed on the surface of thin silver film covered by 1?7 Langmuir monolayers of stearic acid. We show that the intensity of the giant Raman scattering (GRS) changes proportionally to r-1 with removal of a molecule from the surface of a metal, which is in good agreement with the theory. The distances over which the strength of the electric field enhanced by the surface makes a substantial contribution to the processes mentioned are of the order of 10 nm. |
| Subject | |
|
Topic |
giant Raman scattering |
|
Topic |
oxazine 1 |
|
Topic |
thin silver film |
|
Topic |
Langmuir monolayer |
|
Topic |
stearine |
|
Topic |
surface-enhanced fluorescence |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Appl. Spectr. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
86 |
|
Part Detail:issue |
|
|
Part Number |
6 |
|
Extent(unit="pages") |
|
|
Start |
987 |
|
End |
992 |
|
Genre(marcgt) |
periodical |
| Identifier | ger01a |
| Identifier:DOI | 10.1023/A:1014351115569 |
| Location | |
|
URL |
http://dx.doi.org/10.1023/A:1014351115569 |
| Title Information | |
|
Title |
Spectroscopic properties of molecules interacting with small dielectric particles |
| Name:Personal | |
|
Name Part:given |
Joel |
|
Name Part:family |
Gersten |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Abraham |
|
Name Part:family |
Nitzan |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Optical properties of small dielectric spheroids with or without adsorbed molecules are studied theoretically. Expressions for the absorption line shapes, the radiative and nonradiative decay rates, and quantum yields are derived. In the case of a molecule near a spheroid the magnitudes differ dramatically from the corresponding case of a molecule near a plane. The Journal of Chemical Physics is copyrighted by The American Institute of Physics. |
| Subject | |
|
Topic |
line widths |
|
Topic |
spheroids |
|
Topic |
optical properties |
|
Topic |
radiationless decay |
|
Topic |
energy-level transitions |
|
Topic |
raman effect |
|
Topic |
surfaces |
|
Topic |
molecules |
|
Topic |
interactions |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
75 |
|
Part Detail:issue |
|
|
Part Number |
3 |
|
Extent(unit="pages") |
|
|
Start |
1139 |
|
End |
1152 |
|
Genre(marcgt) |
periodical |
| Identifier | ger81 |
| Identifier:DOI | 10.1063/1.442161 |
| Location | |
|
URL |
http://dx.doi.org/10.1063/1.442161 |
| Title Information | |
|
Title |
Photophysics and photochemistry near surfaces and small particles |
| Name:Personal | |
|
Name Part:given |
Joel I. |
|
Name Part:family |
Gersten |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Abraham |
|
Name Part:family |
Nitzan |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The optical response of molecucules adsorbed at or near interfaces are known to be strongly modified relative to those of the free molecules. Surface-enhanced Raman scattering is the most prominent example, however practically all molecular optical properties are affected. In this paper we review the electromagnetic theory of these phenomena with particular emphasis on resonance processes. We discuss lifetimes of excited molecular states, absorption, resonance Raman and fluorescence cross-sections, light scattering and emission yields, energy transfer between adsorbed molecules and photochemical processes. The electromagnetic theory of these phenomena incorporates the surface effect on the local electromagnetic field intensity with the surface-induced radiative and nonradiative decay rates to give working expressions for cross-sections, rates and yields of surface optical processes in terms of the incident beam direction, polarization and frequency, geometry and optical properties of the substrate and its environment and of the optical properties, location and orientation (relative to the substrate) of the adsorbed molecule. Available experimental results are in good qualitative or semiquantitative agreement with the theory. In addition we consider the role of cavity sites in surface-enhanced optical processes. We discuss two models for cavity sites, the conical wedge and enclosures between small particles. The latter are shown to be associated with particularly large enhancements both of the local field intensity and of the surface-induced radiative and nonradiative decay rates. Finally we dwell on the optical properties of small molecular particles which, near the molecular resonance, may give rise to strong local field enhancement provided that the molecules respond coherently to the incident radiation field. We show that the overall response depends on the rate of dephasing processes, which act to drive molecules out of phase with each other. The actual enhancements depend on this rate and on the particle size and shape. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Surf. Sci. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
158 |
|
Part Detail:issue |
|
|
Part Number |
1-3 |
|
Extent(unit="pages") |
|
|
Start |
165 |
|
End |
189 |
|
Genre(marcgt) |
periodical |
| Identifier | ger85 |
| Identifier:DOI | 10.1016/0039-6028(85)90293-6 |
| Location | |
|
URL |
http://dx.doi.org/10.1016/0039-6028(85)90293-6 |
| Title Information | |
|
Title |
Fluorescence quenching of 1-methylaminopyrene near gold nanoparticles: size regime dependence of the small metallic particles |
| Name:Personal | |
|
Name Part:given |
Sujit Kumar |
|
Name Part:family |
Ghosh |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Anjali |
|
Name Part:family |
Pal |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Subrata |
|
Name Part:family |
Kundu |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Sudip |
|
Name Part:family |
Nath |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Tarasankar |
|
Name Part:family |
Pal |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Gold nanoparticles of variable sizes have been exploited to study their influence on the emission behavior of methylamino derivative of pyrene. The probe molecules adsorbed onto the metallic surfaces suffer strong quenching of their fluorescence and the rate of quenching efficiency with particle size is different for two different size regimes. The size regime dependence of the particles on the fluorescence quenching process have been rationalized in view of the dependence of surface area on the size of the particles. The mechanism of fluorescence quenching on the gold surfaces has been treated in the light of electron and energy-transfer processes. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Chem. Phys. Lett. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
395 |
|
Part Detail:issue |
|
|
Part Number |
4-6 |
|
Extent(unit="pages") |
|
|
Start |
366 |
|
End |
372 |
|
Genre(marcgt) |
periodical |
| Identifier | gho04 |
| Identifier:DOI | 10.1016/j.cplett.2004.08.016 |
| Location | |
|
URL |
http://dx.doi.org/10.1016/j.cplett.2004.08.016 |
| Title Information | |
|
Title |
Near-field optics theories |
| Name:Personal | |
|
Name Part:given |
Christian |
|
Name Part:family |
Girard |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Alain |
|
Name Part:family |
Dereux |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The development of near-field optics theory is reviewed. We first recall that near-field optics is not limited to near-field microscopy. Broadly speaking, it concerns phenomena involving evanescent electromagnetic waves. The importance of such waves was ignored for a long time in optical and surface physics until the emergence of scanning near-field optical microscopes. Taking evanescent waves into account prevents the use of any simple approximation in the set of Maxwell's equations. The various theoretical approaches of near-field optics are discussed from the point of view of their ability to assess evanescent electromagnetic waves. We discuss the main results of the application of the various practical schemes which all rely on a numerical procedure. This review was received in February 1996. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Rep. Prog. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
59 |
|
Part Detail:issue |
|
|
Part Number |
5 |
|
Extent(unit="pages") |
|
|
Start |
657 |
|
End |
699 |
|
Genre(marcgt) |
periodical |
| Identifier | gir96 |
| Identifier:DOI | 10.1088/0034-4885/59/5/002 |
| Location | |
|
URL |
http://stacks.iop.org/0034-4885/59/657 |
|
URL |
http://dx.doi.org/10.1088/0034-4885/59/5/002 |
| Title Information | |
|
Title |
Effective polarizability of a molecule physisorbed on a spherical metal particle: nonlocal effects |
| Name:Personal | |
|
Name Part:given |
C. |
|
Name Part:family |
Girard |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
F. |
|
Name Part:family |
Hache |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The electromagnetic interactions between a molecule and a spherical metal particle affect the linear response of the molecule. We present a general method to calculate the effective dynamic polarizability of such physisorbed systems by including the nonlocal character of the electron response in the sphere. Our model takes into account several long-range mechanisms connected to the dispersion, induction and local field effects. When the sphere reduces to a single atom, we recover results already known for a pair of atoms. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
118 |
|
Part Detail:issue |
|
|
Part Number |
2 |
|
Extent(unit="pages") |
|
|
Start |
249 |
|
End |
264 |
|
Genre(marcgt) |
periodical |
| Identifier | gir87 |
| Identifier:DOI | 10.1016/0301-0104(87)87041-6 |
| Location | |
|
URL |
http://dx.doi.org/10.1016/0301-0104(87)87041-6 |
| Title Information | |
|
Title |
Interaction of metal particles with adsorbed dye molecules: absorption and luminescence |
| Name:Personal | |
|
Name Part:given |
A. M. |
|
Name Part:family |
Glass |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
P. F. |
|
Name Part:family |
Liao |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
J. G. |
|
Name Part:family |
Bergman |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
D. H. |
|
Name Part:family |
Olson |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Opt. Lett. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
5 |
|
Part Detail:issue |
|
|
Part Number |
9 |
|
Extent(unit="pages") |
|
|
Start |
368 |
|
Genre(marcgt) |
periodical |
| Identifier | gla80 |
| Location | |
|
URL |
http://ol.osa.org/abstract.cfm?URI=ol-5-9-368 |
| Title Information | |
|
Title |
Detection of adsorption of Ru(II) and Os(II) polypyridyl complexes on gold and silver nanoparticles by single-photon counting emission measurements |
| Name:Personal | |
|
Name Part:given |
Wilhelm R. |
|
Name Part:family |
Glomm |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Selina J. |
|
Name Part:family |
Moses |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Matthew K. |
|
Name Part:family |
Brennaman |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
John M. |
|
Name Part:family |
Papanikolas |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Stefan |
|
Name Part:family |
Franzen |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The present study describes a new application of ruthenium(II) tris(bipyridine) (Ru(bpy)(3)(2+)) and osmium(II) tris(bipyridine) (Os(bpy)(3)(2+)) as phosphorescent labels for the quantification of surface binding of molecules to gold and silver nanoparticles. The fraction of Rtt(bpy)(3)(2+) and Os(bpy)(3)(2+) that is in solution can be distinguished from the surface-bound fraction by the relative lifetimes and integrated emission yields as determined by time-correlated single-photon counting (TCSPC) spectroscopy. Complementary steady-state measurements were carried out to confirm surface attachment of the phosphorescent label molecules. Although the emission of solutions of Ru(bpy)(3)(2+) and Os(bpy)(3)(2+) is quenched proportional to the concentration of 10 nm Au or 20 nm Ag nanoparticles, the quenching is static and not diffusional quenching observed in Stern-Volmer plots. The results demonstrate that time-resolved spectroscopy provides a rapid method for the measurement of surface binding of labeled molecules on metallic nanoparticles. While steady-state measurements require the preparation of a series of samples with varying quencher concentrations and a reference, the method described herein requires a single sample plus reference. The mechanism for phosphorescence quenching on Au and Ag nanoparticles is discussed in terms of energy and electron transfer theories. |
| Subject | |
|
Topic |
energy-transfer |
|
Topic |
electron-transfer |
|
Topic |
charge-transfer |
|
Topic |
metal |
|
Topic |
fluorescence |
|
Topic |
binding |
|
Topic |
surface |
|
Topic |
nanoclusters |
|
Topic |
absorption |
|
Topic |
dynamics |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Phys. Chem. B |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
109 |
|
Part Detail:issue |
|
|
Part Number |
2 |
|
Extent(unit="pages") |
|
|
Start |
804 |
|
End |
810 |
|
Genre(marcgt) |
periodical |
| Identifier | glo05 |
| Identifier:DOI | 10.1021/jp049184k |
| Location | |
|
URL |
http://dx.doi.org/10.1021/jp049184k |
| Title Information | |
|
Title |
Controlled coupling of a single emitter to a single mode of a microsphere: where do we stand? |
| Name:Personal | |
|
Name Part:given |
Stephan |
|
Name Part:family |
Goetzinger |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
L. d. |
|
Name Part:family |
Menezes |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
A. |
|
Name Part:family |
Mazzei |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
O. |
|
Name Part:family |
Benson |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Dmitri V. |
|
Name Part:family |
Talapin |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Nicolaj |
|
Name Part:family |
Gaponik |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Horst |
|
Name Part:family |
Weller |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Andrey L. |
|
Name Part:family |
Rogach |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Vahid |
|
Name Part:family |
Sandoghdar |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre(bibtex) | incollection |
| Origin Information | |
|
Issuance |
monographic |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Laser Resonators and Beam Control VI |
|
Name:Personal |
|
|
Name Part:given |
Alexis V. |
|
Name Part:family |
Kudryashov |
|
Role |
|
|
Role Term:Text |
editor |
|
Name:Personal |
|
|
Name Part:given |
Alan H. |
|
Name Part:family |
Paxton |
|
Role |
|
|
Role Term:Text |
editor |
|
Type of Resource |
text |
|
Genre |
book |
|
Origin Information |
|
|
Publisher |
Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, USA |
|
Date Issued(encoding="marc") |
2003 |
|
Issuance |
monographic |
|
Part |
|
|
Extent(unit="pages") |
|
|
Start |
207 |
|
End |
214 |
|
Physical Description |
|
|
Form(marcform) |
|
|
Related Item:series |
|
|
Title Information |
|
|
Title |
Proc. SPIE |
|
Part |
|
|
Part Detail:volume |
|
| Identifier | bookgoe03 |
| Title Information | |
|
Title |
Biotin-Streptavidin-Induced Aggregation of Gold Nanorods: Tuning Rod-Rod Orientation |
| Name:Personal | |
|
Name Part:given |
Anand |
|
Name Part:family |
Gole |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Catherine J. |
|
Name Part:family |
Murphy |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We report herein biotin-streptavidin-mediated aggregation studies of long gold nanorods. We have previously demonstrated end-to-end linkages of gold nanorods driven by the biotin-streptavidin interaction (Caswell et al. J. Am. Chem. Soc. 2003, 125, 13914). In that report, the specific binding of biotin disulfide to the gold nanorod edges was achieved due to the preferred binding of thiol molecules to the Au111 surface (gold nanorod ends) as opposed to the gold nanorod side faces. This led to the end-end linkage of gold nanorods upon subsequent addition of streptavidin. In this report we demonstrate a simple procedure to biotinylate the entire gold nanorod surface and subsequently form a 3-D assembly by addition of streptavidin. Gold nanorods were synthesized by the three-step seeding protocol documented in our previous articles. The surface of gold nanorods was further modified by a layer of a weak polyelectrolyte, poly(acrylic acid), PAA. A biotin molecule which has an amine group at one end (biotin-PEO-amine) was anchored to the carboxylic acid group of the polyelectrolyte using the well-known carbodiimide chemistry. This process biotinylates the entire gold nanorod surface. Addition of streptavidin further leads to aggregation of gold nanorods. A closer look at the aggregates reveals a preferential side-to-side assembly of gold nanorods. The gold nanorods were characterized at each stage by UV-vis spectroscopy, light scattering, and transmission electron microscopy (TEM) measurements. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Langmuir |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
21 |
|
Part Detail:issue |
|
|
Part Number |
23 |
|
Extent(unit="pages") |
|
|
Start |
10756 |
|
End |
10762 |
|
Genre(marcgt) |
periodical |
| Identifier | gol05 |
| Identifier:DOI | 10.1021/la0512704 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/la0512704 |
| Title Information | |
|
Title |
Electrophoresis of proteins in agar jelly |
| Name:Personal | |
|
Name Part:given |
A. H. |
|
Name Part:family |
Gordon |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
B. |
|
Name Part:family |
Keil |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
K. |
|
Name Part:family |
Sebasta |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
O. |
|
Name Part:family |
Knessl |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
F. |
|
Name Part:family |
Sorm |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Coll. Czech. Chem. Commun. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
15 |
|
Extent(unit="pages") |
|
|
Start |
1 |
|
End |
8 |
|
Genre(marcgt) |
periodical |
| Identifier | gor50 |
| Title Information | |
|
Title |
Surface-Enhanced Raman Scattering on Dendrimer/Metallic Nanoparticle Layer-by-Layer Film Substrates |
| Name:Personal | |
|
Name Part:given |
Paul J. G. |
|
Name Part:family |
Goulet |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
David S. |
|
Name Part:family |
dos Santos Jr. |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Ramón A. |
|
Name Part:family |
Alvarez-Puebla |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Osvaldo N. |
|
Name Part:family |
Oliveira Jr. |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Ricardo F. |
|
Name Part:family |
Aroca |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | In this paper, the fabrication, characterization, and application of unique layer-by-layer (LBL) films of dendrimers and metallic nanoparticles is reported. Silver nanoparticles (d = 20 nm) are produced in solution by sodium citrate reduction and incorporated into thin films with generation 1 and 5 DAB-Am dendrimers (polypropylenimine dendrimers with amino surface groups) by the LBL technique. The resulting nanocomposite films are characterized by UV-visible surface plasmon absorption and atomic force microscopy (AFM) measurements, and employed as substrates for surface-enhanced Raman scattering (SERS) of 2-naphthalenethiol. Through variation of the molecular size (dendrimer generation) and concentration of the cross-linker used, as well as the number of layers produced, the optical properties of several different possible architectures are studied. In the films, Ag nanoparticles are shown to be effectively immobilized and stabilized with increased control over their spacing and aggregation. Moreover, the films are shown to be excellent substrates for SERS measurements, demonstrating significant enhancement capability. As expected, large electromagnetic enhancement of Raman scattering signals is found to be strongly dependent on interparticle coupling between neighboring metallic nanoparticles. Finally, the possibility of detecting SERS signals from architectures with intervening layers between the metal nanoparticles and analyte molecules is explored. It is shown that although there are decreases in intensity with increasing number of intervening layers (as is expected from the distance dependence of SERS), electromagnetic enhancement is still able to function at these distances, thus offering the possibility of developing sensors with external layers that are chemically selective for specific analytes. |
| Subject | |
|
Topic |
ultrasensitive chemical-analysis |
|
Topic |
langmuir-blodgett monolayers |
|
Topic |
noble-metal nanoparticles |
|
Topic |
poly(amidoamine) dendrimers |
|
Topic |
optical-properties |
|
Topic |
silver electrode |
|
Topic |
island films |
|
Topic |
spectroscopy |
|
Topic |
sers |
|
Topic |
gold |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Langmuir |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
21 |
|
Part Detail:issue |
|
|
Part Number |
12 |
|
Extent(unit="pages") |
|
|
Start |
5576 |
|
End |
5581 |
|
Genre(marcgt) |
periodical |
| Identifier | gou05 |
| Identifier:DOI | 10.1021/la050202e |
| Location | |
|
URL |
http://dx.doi.org/10.1021/la050202e |
| Title Information | |
|
Title |
Spin-Förster transfer in optically excited quantum dots |
| Name:Personal | |
|
Name Part:given |
Alexander O. |
|
Name Part:family |
Govorov |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The mechanisms of energy and spin transfer in quantum dot pairs coupled via the Coulomb interaction are studied. Exciton transfer can be resonant or phonon-assisted. In both cases, the transfer rates strongly depend on the resonance conditions. The spin selection rules in the transfer process come from the exchange and spin-orbit interactions. The character of energy dissipation in spin transfer is different than that in the traditional spin currents. The spin-dependent photon cross-correlation functions reflect the exciton transfer process. In addition, a mathematical method to calculate Förster transfer in crystalline nanostructures beyond the dipole-dipole approximation is described. |
| Subject | |
|
Topic |
semiconductor quantum dots |
|
Topic |
nanostructured materials |
|
Topic |
excitons |
|
Topic |
exchange interactions (electron) |
|
Topic |
spin-orbit interactions |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Phys. Rev. B |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
71 |
|
Part Detail:issue |
|
|
Part Number |
15 |
|
Extent(unit="pages") |
|
|
Start |
155323 |
|
Genre(marcgt) |
periodical |
| Identifier | gov05 |
| Identifier:DOI | 10.1103/PhysRevB.71.155323 |
| Location | |
|
URL |
http://link.aps.org/abstract/PRB/v71/e155323 |
|
URL |
http://dx.doi.org/10.1103/PhysRevB.71.155323 |
| Title Information | |
|
Title |
Spin and energy transfer in nanocrystals without tunneling |
| Name:Personal | |
|
Name Part:given |
A. O. |
|
Name Part:family |
Govorov |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We describe a mechanism of spin transfer between individual quantum dots without tunneling. Incident circularly polarized photons create interband excitons with nonzero electron spin in the first quantum dot. When the quantum-dot pair is properly designed, this excitation can be transferred to the neighboring dot via the Coulomb interaction with conservation or flipping of electron spin. The second dot can radiate circularly polarized photons at smaller energy. Selection rules for spin transfer are determined by the resonant conditions and by the strong spin-orbit interaction in the valence band of nanocrystals. Coulomb-induced energy and spin transfer in pairs and chains of dots can become very efficient under resonant conditions. The electron can preserve its spin orientation even in randomly oriented nanocrystals. |
| Subject | |
|
Topic |
quantum dots |
|
Topic |
electron spin polarisation |
|
Topic |
excitons |
|
Topic |
spin-orbit interactions |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Phys. Rev. B |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
68 |
|
Part Detail:issue |
|
|
Part Number |
7 |
|
Extent(unit="pages") |
|
|
Start |
075315 |
|
Genre(marcgt) |
periodical |
| Identifier | gov03 |
| Identifier:DOI | 10.1103/PhysRevB.68.075315 |
| Location | |
|
URL |
http://link.aps.org/abstract/PRB/v68/e075315 |
|
URL |
http://dx.doi.org/10.1103/PhysRevB.68.075315 |
| Title Information | |
|
Title |
Exciton-Plasmon Interaction and Hybrid Excitons in Semiconductor-Metal Nanoparticle Assemblies |
| Name:Personal | |
|
Name Part:given |
Alexander O. |
|
Name Part:family |
Govorov |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Garnett W. |
|
Name Part:family |
Bryant |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Wei |
|
Name Part:family |
Zhang |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Timur |
|
Name Part:family |
Skeini |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Jaebeom |
|
Name Part:family |
Lee |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Nicholas A. |
|
Name Part:family |
Kotov |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Joseph M. |
|
Name Part:family |
Slocik |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Rajesh R. |
|
Name Part:family |
Naik |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We describe the physical properties of excitons in hybrid complexes composed of semiconductor and metal nanoparticles. The interaction between individual nanoparticles is revealed as an enhancement or suppression of emission. Enhanced emission comes from electric field amplified by the plasmon resonance, whereas emission suppression is a result of energy transfer from semiconductor to metal nanoparticles. The emission intensity and energy transfer rate depend strongly on the geometrical parameters of the superstructure and the physical and material properties of the nanoparticles. In particular, the emission enhancement effect appears for nanoparticles with relatively small quantum yield, and silver nanoparticles have stronger enhancement compared to gold ones. Using realistic models, we review and analyze available experimental data on energy transfer between nanoparticles. In hybrid superstructures conjugated with polymer linkers, optical emission is sensitive to environmental parameters such as, for example, temperature. This sensitivity comes from expansion or contraction of a linker. With increasing temperature, emission of polymer-conjugated complexes can decrease or increase depending on the organization of a superstructure. The structures described here have potential as sensors and actuators. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Nano Lett. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
6 |
|
Part Detail:issue |
|
|
Part Number |
5 |
|
Extent(unit="pages") |
|
|
Start |
984 |
|
End |
994 |
|
Genre(marcgt) |
periodical |
| Identifier | gov06 |
| Identifier:DOI | 10.1021/nl0602140 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/nl0602140 |
| Title Information | |
|
Title |
Preparation and Characterization of Au Colloid Monolayers |
| Name:Personal | |
|
Name Part:given |
Katherine C. |
|
Name Part:family |
Grabar |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
R. Griffith |
|
Name Part:family |
Freeman |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Michael B. |
|
Name Part:family |
Hommer |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Michael J. |
|
Name Part:family |
Natan |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The design and initial characterization of two-dimensional arrays of colloidal Au particles are reported. These surfaces are prepared by self-assembly of 12 nn diameter colloidal Au particles onto immobilized polymers having pendant functional groups with high affinity for Au (i.e., CN, SH, and NH2). The polymers are formed by condensation of functionalized alkoxysilanes onto cleaned quartz, glass, and SiO2 surfaces. The assembly protocol is carried out completely in solution: cleaned substrates are immersed in methanolic solutions of organosilane, rinsed, and subsequently immersed in aqueous colloidal Au solutions. Two-dimensional arrays spontaneously form on the polymer surface, The resulting substrates have been characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), and surface-enhanced Raman scattering (SERS). TEM data show that the particles are spatially separated but close enough to interact electromagnetically (small spacing compared to lambda). The UV-vis data show that collective particle surface plasmon modes are present in the 650-750 nm region, suggesting that these assemblies are SERS-active. This is indeed the case, with enhancement factors of roughly 10(4). Au colloid monolayers possess a set of features that make them very attractive for both basic and applied uses, including uniform roughness, high stability, and biocompatibility. |
| Subject | |
|
Topic |
surface-enhanced raman |
|
Topic |
self-assembled monolayers |
|
Topic |
thin ag films |
|
Topic |
silver electrode |
|
Topic |
resonance raman |
|
Topic |
gold colloids |
|
Topic |
scattering |
|
Topic |
spectroscopy |
|
Topic |
sols |
|
Topic |
dependence |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Anal. Chem. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
67 |
|
Part Detail:issue |
|
|
Part Number |
4 |
|
Extent(unit="pages") |
|
|
Start |
735 |
|
End |
743 |
|
Genre(marcgt) |
periodical |
| Identifier | gra95 |
| Title Information | |
|
Title |
Methode immuno-electrophoretique d'analyse de melanges de substances antigeniques |
| Name:Personal | |
|
Name Part:given |
Pierre |
|
Name Part:family |
Grabar |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Curtis A. |
|
Name Part:Terms of Address |
Jr. |
|
Name Part:family |
Williams |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Resume On effectue d'abord une electrophorese du produit a etudier dans un gel de gelose a 1.5-2% dans un tampon veronal de [lambda]/2 = 0.05 et aved une chute de potentiel de 3-4 V/cm dans le gel. On fait ensuite diffuser des immunserums precipitants perpendiculairement a l'axe de migration electrophoretique. Chaque constituant du melange etudie donne une bande de precipitation specifique independante, ce qui permet de le distinguer grace a sa specificite immunologique et de le definir par sa mobilite electrophoretique relative. Les details techniques sont decrits et les possibilites de la methode sont discutes. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Biochim. Biophys. Acta |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
17 |
|
Extent(unit="pages") |
|
|
Start |
67 |
|
End |
74 |
|
Genre(marcgt) |
periodical |
| Identifier | gra55 |
| Identifier:DOI | 10.1016/0006-3002(55)90320-6 |
| Location | |
|
URL |
http://www.sciencedirect.com/science/article/B73G9-47KGRYM-72/2/e778c10e218be1706248f03135cced29 |
|
URL |
http://dx.doi.org/10.1016/0006-3002(55)90320-6 |
| Title Information | |
|
Title |
Influence of dielectric function properties on the optical response of plasmon resonant metallic nanoparticles |
| Name:Personal | |
|
Name Part:given |
N. K. |
|
Name Part:family |
Grady |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
N. J. |
|
Name Part:family |
Halas |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
P. |
|
Name Part:family |
Nordlander |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The optical properties of plasmon resonant metallic nanoparticles are of great interest because of their ability to both control optical fields on the nanometer scale and function as sensitive indicators of their local environment. We investigate the relationship between the dielectric function of a metal and the optical properties of the constituent nanoparticle. Using a Drude shell?silica core nanoshell geometry, we examine how systematic changes in the parameters of the Drude dielectric function affect the near and far field properties of the nanoparticle. The nanoshell geometry allows separation of intrinsic properties and extrinsic phase retardation, or finite size, effects. |
| Related Item:Host | |
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Title Information |
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|
Title |
Chemical Physics Letters |
|
Origin Information |
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Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
399 |
|
Part Detail:issue |
|
|
Part Number |
1-3 |
|
Extent(unit="pages") |
|
|
Start |
167 |
|
End |
171 |
|
Genre(marcgt) |
periodical |
| Identifier | gra04 |
| Identifier:DOI | 10.1016/j.cplett.2004.09.154 |
| Location | |
|
URL |
http://www.sciencedirect.com/science/article/B6TFN-4DM2FMC-K/2/320890c4a1d8c68c9e670a1572c9fea8 |
|
URL |
http://dx.doi.org/10.1016/j.cplett.2004.09.154 |
| Title Information | |
|
Title |
Conformation of Bovine Serum Albumin as a Function of Hydration Monitored by Infrared Spectroscopy |
| Name:Personal | |
|
Name Part:given |
Joze |
|
Name Part:family |
Grdadolnik |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The secondary structure of bovine serum albumin (BSA) is determined from infrared spectra (cast films, solution in phosphate buffer) by analyzing the structure of Amide bands. Due to strong overlapping of intrinsic bands three classical methods of band decomposition was implemented: Fourier self deconvolution, second derivatives and band fitting algorithm. The initial values for the number of the components and their position was checked with a novel procedure of dry and hydrated H/D exchange. The most dominant band component in Amide I region is the band at 1654 cm-1, which is usually attributed to a-helical structure. Other bands in Amide I region are attributed to various type of turns. Hydration of protein, as well as the solvation of protein in phosphate buffer, induces the radical change in the secondary structure, especially in the population of a-helices. Drying of the protein film causes a partial denaturation. Classical methods for determine the changes in secondary structure are not accurate enough. Moreover, the interpretation of changes can be easily misleading. Hence, the difference spectroscopy was used to clarify the effects of hydration and solvation on the protein secondary structure. The solvated protein was measured in ATR cell. For proper compare the ATR spectrum with the normal transmission one, first optical constant n and k were calculated and later the exact absorption spectrum. |
| Subject | |
|
Topic |
BSA |
|
Topic |
RSA |
|
Topic |
Raman |
|
Topic |
infrared |
|
Topic |
protein structure |
|
Topic |
structure of Amide I band |
|
Topic |
H/D exchange |
|
Topic |
denaturation |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Int. J. Vibr. Spec. |
|
Origin Information |
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|
Issuance |
continuing |
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Part |
|
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Part Detail:volume |
|
|
Part Number |
6 |
|
Part Detail:issue |
|
|
Part Number |
1 |
|
Extent(unit="pages") |
|
|
Start |
6 |
|
Genre(marcgt) |
periodical |
| Identifier | grd02 |
| Location | |
|
URL |
http://www.ijvs.com/volume6/edition1/section3.html |
| Title Information | |
|
Title |
Reversible Aggregation/Deaggregation of Gold Nanoparticles Induced by a Cleavable Dithiol Linker |
| Name:Personal | |
|
Name Part:given |
Cristian |
|
Name Part:family |
Guarise |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Lucia |
|
Name Part:family |
Pasquato |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Paolo |
|
Name Part:family |
Scrimin |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Aqueous solutions of Au colloids (12 ± 4 nm size) when treated with a blend of mono- and dithiols aggregate forming stable clusters, as evidenced by the shift of their surface plasmon (SP) band from 512 to ca. 600 nm. The presence of carboxylate ester functions on the dithiol allows its cleavage by addition of a cleaving agent, such as hydrazine. The cleavage process results in the breaking down of the clusters of nanoparticles and the shift of the SP band back to lower wavelengths. Further addition of dithiol causes the formation of the clusters again. The aggregation/deaggregation process may be monitored visually by following the color change from pink-red to purple and vice versa in the forward and backward steps, respectively. |
| Subject | |
|
Topic |
dna |
|
Topic |
monolayers |
|
Topic |
clusters |
|
Topic |
molecules |
|
Topic |
chemistry |
|
Topic |
size |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Langmuir |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
21 |
|
Part Detail:issue |
|
|
Part Number |
12 |
|
Extent(unit="pages") |
|
|
Start |
5537 |
|
End |
5541 |
|
Genre(marcgt) |
periodical |
| Identifier | gua05 |
| Identifier:DOI | 10.1021/la0470232 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/la0470232 |
| Title Information | |
|
Title |
Single-Molecule Measurements of Gold-Quenched Quantum Dots |
| Name:Personal | |
|
Name Part:given |
Zoher |
|
Name Part:family |
Gueroui |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Albert |
|
Name Part:family |
Libchaber |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We report the study of the quenching of quantum dots (CdSe) by gold nanoparticles at the single-molecule level. Double-stranded DNA is used as a rigid spacer to tune the distance between the two nanoparticles. The width of the fluorescent intensity distribution, monitored at different interparticle distances, reflects both the nanoparticle heterogeneity and the fluorescence intermittency of the quantum dot. The fluorescence distribution emitted by single CdSe nanocrystals can easily be distinguished from the fluorescence of partially quenched CdSe. Our results show that the distance-dependence quenching is compatible with a Förster-type process. |
| Subject | |
|
Topic |
DNA |
|
Topic |
gold |
|
Topic |
fluorescence |
|
Topic |
nanoparticles |
|
Topic |
semiconductor quantum dots |
|
Topic |
cadmium compounds |
|
Topic |
II-VI semiconductors |
|
Topic |
radiation quenching |
| Related Item:Host | |
|
Title Information |
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|
Title |
Phys. Rev. Lett. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
93 |
|
Part Detail:issue |
|
|
Part Number |
16 |
|
Extent(unit="pages") |
|
|
Start |
166108 |
|
Genre(marcgt) |
periodical |
| Identifier | gue04 |
| Identifier:DOI | 10.1103/PhysRevLett.93.166108 |
| Location | |
|
URL |
http://link.aps.org/abstract/PRL/v93/e166108 |
|
URL |
http://dx.doi.org/10.1103/PhysRevLett.93.166108 |
| Title Information | |
|
Title |
Absorption spectrum of clusters of spheres from the general solution of Maxwell's equations. II. Optical properties of aggregated metal spheres |
| Name:Personal | |
|
Name Part:given |
J. M. |
|
Name Part:family |
Gérardy |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
M. |
|
Name Part:family |
Ausloos |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | A very general theory for the infrared absorption spectrum of homogeneous sphere clusters is presented. Maxwell's equations are solved for any arbitrary cluster geometry and for any light (polarized or not) incidence by usual expansion of the various fields. Usual boundary conditions are used but take into account the possible existence of plasmons in the spheres. High-order multipolar (electric and magnetic) interaction effects are included. The problem is cast into the calculation of the microscopic effective dielectric and magnetic susceptibility for the spheres, and that of the appropriate interaction terms. The latter (which constitute the hardest part of the theory in general) are calculated by formulating in a very practical way a recurrence relation for spherical vector wave functions in different reference frames. The extinction cross section is derived for any arbitrary case in order to allow for comparison of experimental data and previous theoretical work. The theory in the absence of any high-order polar effect is applied to the case of metallic clusters, e.g., small sodium spheres. Effects due to size distribution, sphere separation, and sphere magnetic permittivity are analyzed. Different light incidences are considered. A very brief discussion of the experimental status is presented for the case of metallic spheres. New experiments are suggested for which the theory is easily read out. Appendices contain new relations between Legendre functions and "spherical coupling parameters" allowing one to treat up to (24,24) polar-order interactions. |
| Related Item:Host | |
|
Title Information |
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|
Title |
Phys. Rev. B |
|
Origin Information |
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Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
25 |
|
Part Detail:issue |
|
|
Part Number |
6 |
|
Extent(unit="pages") |
|
|
Start |
4204 |
|
End |
4229 |
|
Genre(marcgt) |
periodical |
| Identifier | ger82 |
| Identifier:DOI | 10.1103/PhysRevB.25.4204 |
| Location | |
|
URL |
http://link.aps.org/abstract/PRB/v25/p4204 |
|
URL |
http://dx.doi.org/10.1103/PhysRevB.25.4204 |
| Title Information | |
|
Title |
Hybridization dynamics of surface immobilized DNA |
| Name:Personal | |
|
Name Part:given |
Michael F. |
|
Name Part:family |
Hagan |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Arup K. |
|
Name Part:family |
Chakraborty |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We model the hybridization kinetics of surface attached DNA oligomers with solubilized targets. Using both master equation and rate equation formalisms, we show that, for surface coverages at which the surface immobilized molecules interact, barriers to penetration create a distribution of target molecule concentrations within the adsorbed layer. By approximately enumerating probe and target conformations, we estimate the probability of overlap between complementary probe and target regions as a function of probe density and chain length. In agreement with experiments, we find that as probe molecules interact more strongly, fewer nucleation sites become accessible and binding rates are diminished relative to those in solution. Nucleation sites near the grafted end of the probes are least accessible; thus targets which preferentially bind to this region show more drastic rate reductions than those that bind near the free end of the probe. The implications of these results for DNA-based biosensors are discussed. |
| Subject | |
|
Topic |
DNA |
|
Topic |
molecular biophysics |
|
Topic |
macromolecules |
|
Topic |
master equation |
|
Topic |
reaction rate constants |
|
Topic |
adsorbed layers |
|
Topic |
surface structure |
|
Topic |
molecular configurations |
|
Topic |
nucleation |
|
Topic |
probes |
| Related Item:Host | |
|
Title Information |
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|
Title |
J. Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
120 |
|
Part Detail:issue |
|
|
Part Number |
10 |
|
Extent(unit="pages") |
|
|
Start |
4958 |
|
End |
4968 |
|
Genre(marcgt) |
periodical |
| Identifier | hag04 |
| Identifier:DOI | 10.1063/1.1645786 |
| Location | |
|
URL |
http://dx.doi.org/10.1063/1.1645786 |
| Title Information | |
|
Title |
A 1.4-nm gold cluster covalently attached to antibodies improves immunolabeling |
| Name:Personal | |
|
Name Part:given |
James F. |
|
Name Part:family |
Hainfeld |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Frederic R. |
|
Name Part:family |
Furuya |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | A large gold cluster (Au1.4nm) was covalently coupled to IgG and Fab' fragments. Its gold core is 1.4 nm in diameter and the Fab'-Au1.4nm immunoconjugate is the smallest gold immunoprobe that can be seen directly in the conventional electron microscope. It is useful in high- resolution immunolabeling, providing a resolution of 7.0 nm. The cluster's visibility can be enhanced with silver development for use in EM or light microscopy for histological purposes, or to detect less than or equal to 0.2 pg of antigen in immunoblots. By using a gold compound with covalent attachment, a number of advantages over colloidal gold probes are realized, including better resolution, stability, uniformity, sensitivity, and complete absence of aggregation; its small size should also improve penetration and more quantitative labeling of antigenic sites. |
| Related Item:Host | |
|
Title Information |
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|
Title |
J. Histochem. Cytochem. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
40 |
|
Part Detail:issue |
|
|
Part Number |
2 |
|
Extent(unit="pages") |
|
|
Start |
177 |
|
End |
184 |
|
Genre(marcgt) |
periodical |
| Identifier | hai92 |
| Location | |
|
URL |
http://www.jhc.org/cgi/content/abstract/40/2/177 |
| Title Information | |
|
Title |
New Frontiers in Gold Labeling |
| Name:Personal | |
|
Name Part:given |
James F. |
|
Name Part:family |
Hainfeld |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Richard D. |
|
Name Part:family |
Powell |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Recent advances in gold technology have led to probes with improved properties and performance for cell biologists: higher labeling density, better sensitivity, and greater penetration into tissues. Gold clusters, such as the 1.4-nm Nanogold, are gold compounds that can be covalently linked to Fab' antibody fragments, making small and stable probes. Silver enhancement then makes these small gold particles easily visible by EM, LM, and directly by eye. Another advance is the combination of fluorescent and gold probes for correlative microscopy. Chemical crosslinking of gold particles to many biologically active molecules has made possible many novel probes, such as gold?lipids, gold?Ni?NTA, and gold?ATP. |
| Subject | |
|
Topic |
gold |
|
Topic |
immunogold |
|
Topic |
electron microscopy |
|
Topic |
gold labeling |
|
Topic |
gold clusters |
|
Topic |
immunocytochemistry |
|
Topic |
colloidal gold |
|
Topic |
Nanogold |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Histochem. Cytochem. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
48 |
|
Part Detail:issue |
|
|
Part Number |
4 |
|
Extent(unit="pages") |
|
|
Start |
471 |
|
End |
480 |
|
Genre(marcgt) |
periodical |
| Identifier | hai00 |
| Location | |
|
URL |
http://www.jhc.org/cgi/content/abstract/48/4/471 |
| Title Information | |
|
Title |
Separation of Nanoparticles by Gel Electrophoresis According to Size and Shape |
| Name:Personal | |
|
Name Part:given |
M. |
|
Name Part:family |
Hanauer |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Institute for Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany |
| Name:Personal | |
|
Name Part:given |
S. |
|
Name Part:family |
Pierrat |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Institute for Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany |
| Name:Personal | |
|
Name Part:given |
I. |
|
Name Part:family |
Zins |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Institute for Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany |
| Name:Personal | |
|
Name Part:given |
A. |
|
Name Part:family |
Lotz |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Institute for Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany |
| Name:Personal | |
|
Name Part:given |
C. |
|
Name Part:family |
Sönnichsen |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Institute for Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We demonstrate the separation of gold and silver nanoparticles according to their size and shape by agarose gel electrophoresis after coating them with a charged polymer layer. The separation is monitored optically using the size- and shape-dependent plasmon resonance of noble metal particles and confirmed by transmission electron microscopy (TEM). Electrophoretic mobilities are quantitatively explained by a model based on the Henry formula, providing a theoretical framework for predicting gel mobilities of polymer coated nanoparticles. |
| Related Item:Host | |
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Title Information |
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|
Title |
Nano Lett. |
|
Origin Information |
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|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
7 |
|
Part Detail:issue |
|
|
Part Number |
9 |
|
Extent(unit="pages") |
|
|
Start |
2881 |
|
End |
2885 |
|
Identifier:ISSN |
1530-6984 |
|
Genre(marcgt) |
periodical |
| Identifier | han07 |
| Identifier:DOI | 10.1021/nl071615y |
| Location | |
|
URL |
http://dx.doi.org/10.1021/nl071615y |
| Title Information | |
|
Title |
Electromagnetic fields around silver nanoparticles and dimers |
| Name:Personal | |
|
Name Part:given |
Encai |
|
Name Part:family |
Hao |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
George C. |
|
Name Part:family |
Schatz |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Subject | |
|
Topic |
silver |
|
Topic |
nanoparticles |
|
Topic |
electromagnetic fields |
|
Topic |
surface plasmon resonance |
|
Topic |
surface enhanced Raman scattering |
|
Topic |
particle size |
|
Topic |
molecular orientation |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
120 |
|
Part Detail:issue |
|
|
Part Number |
1 |
|
Extent(unit="pages") |
|
|
Start |
357 |
|
End |
366 |
|
Genre(marcgt) |
periodical |
| Identifier | hao04 |
| Identifier:DOI | 10.1063/1.1629280 |
| Location | |
|
URL |
http://link.aip.org/link/?JCP/120/357/1 |
|
URL |
http://dx.doi.org/10.1063/1.1629280 |
| Title Information | |
|
Title |
Cavity Quantum Electrodynamics |
| Name:Personal | |
|
Name Part:given |
Serge |
|
Name Part:family |
Haroche |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Daniel |
|
Name Part:family |
Kleppner |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | This articles discusses the emergence of a field of atomic physics and quantum optics called cavity quantum electrodynamics (QED). In addition to demonstrating dramatic changes in spontaneous emission, cavity QED has led to the creation of new kinds of microscopic masers that operate with a single atom and a few photons or with photons emitted in pairs in a two-photon transition. The influence of boundary conditions on atomic radiation was pointed out long ago, and a considerable body of literature exists on the subject. Until recently, however, experimental evidence for these effects had been scarce because of the difficulties of preparing, controlling and observing the emission of isolated atoms or molecules near surfaces. Just as a cavity below cutoff suppresses vacuum fluctuations, a resonance cavity enhances them. In addition to changing the radiation rate of atoms, atom-cavity coupling also includes energy shifts. This phenomenon can be understood as a frequency-pulling effect t |
| Subject | |
|
Topic |
QUANTUM electrodynamics |
|
Topic |
MOLECULAR emission cavity analysis |
|
Topic |
QUANTUM optics |
|
Topic |
ATOMS |
|
Topic |
PHYSICS |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Physics Today |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
42 |
|
Part Detail:issue |
|
|
Part Number |
1 |
|
Extent(unit="pages") |
|
|
Start |
24 |
|
End |
30 |
|
Identifier:ISSN |
00319228 |
|
Genre(marcgt) |
periodical |
| Identifier | har89 |
| Location | |
|
URL |
http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=8904031414&loginpage=Login.asp&site=ehost-live |
| Title Information | |
|
Title |
Measurements of the material properties of metal nanoparticles by time-resolved spectroscopy |
| Name:Personal | |
|
Name Part:given |
Gregory V. |
|
Name Part:family |
Hartland |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Subject | |
|
Topic |
SURFACE-PLASMON RESONANCE |
|
Topic |
COHERENT ACOUSTIC PHONONS |
|
Topic |
FEMTOSECOND TRANSIENT ABSORPTION |
|
Topic |
COLLOIDAL GOLD NANOPARTICLES |
|
Topic |
ULTRAFAST ELECTRON DYNAMICS |
|
Topic |
SHAPE-CONTROLLED SYNTHESIS |
|
Topic |
NANOCRYSTAL QUANTUM DOTS |
|
Topic |
CORE-SHELL NANOPARTICLES |
|
Topic |
RELAXATION DYNAMICS |
|
Topic |
AQUEOUS-SOLUTION |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Phys. Chem. Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
6 |
|
Part Detail:issue |
|
|
Part Number |
23 |
|
Extent(unit="pages") |
|
|
Start |
5263 |
|
End |
5274 |
|
Genre(marcgt) |
periodical |
| Identifier | har04 |
| Identifier:DOI | 10.1039/b413368d |
| Location | |
|
URL |
http://dx.doi.org/10.1039/b413368d |
| Title Information | |
|
Title |
Evanescent field excitation and measurement of dye fluorescence in a metallic probe near-field scanning optical microscope |
| Name:Personal | |
|
Name Part:given |
N. |
|
Name Part:family |
Hayazawa |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Y. |
|
Name Part:family |
Inouye |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
S. |
|
Name Part:family |
Kawata |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We introduce a method of dye fluorescence excitation and measurement that utilizes a near-field scanning optical microscope (NSOM). This NSOM uses an apertureless metallic probe, and an optical system that contains a high numerical aperture (NA) objective lens (NA = 1.4). When the area which satisfies NA < 1 is masked, the objective lens allows for the rejection of possible transmitted light (NA < 1) through the sample. In such conditions, the focused spot consists of only the evanescent field. We found that this NSOM system strongly reduces the background of the dye fluorescence and allows for the measurement of the fluorescence intensity below the diffraction limit of the excitation source. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Microsc. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
194 |
|
Part Detail:issue |
|
|
Part Number |
2-3 |
|
Extent(unit="pages") |
|
|
Start |
472 |
|
End |
476 |
|
Genre(marcgt) |
periodical |
| Identifier | hay99 |
| Identifier:DOI | 10.1046/j.1365-2818.1999.00563.x |
| Location | |
|
URL |
http://dx.doi.org/10.1046/j.1365-2818.1999.00563.x |
| Title Information | |
|
Title |
Nano-optics with single quantum systems |
| Name:Personal | |
|
Name Part:given |
Bert |
|
Name Part:family |
Hecht |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | This paper reviews the recent progress in using single quantum systems, here mainly single fluorescent molecules, as local probes for nano-optical field distributions. We start by discussing the role of the absorption cross-section for the spatial resolution attainable in such experiments and its behaviour for different environmental conditions. It is shown that the spatial distribution of field components in a high-numerical aperture laser focus can be mapped with high precision using single fluorescent molecules embedded in a thin polymer film on glass. With this proof-of-principle experiment as a starting point, the possibility of mapping strongly confined and enhanced nano-optical fields close to material structures, e.g. sharp metal tips, is discussed. The mapping of the spatial distribution of the enhanced field at an etched gold tip using a single molecule is presented as an example. Energy transfer effects and quenching are identified as possible artefacts in this context. Finally, it is demonstrated that the local quenching at a sharp metal structure nevertheless can be exploited as a novel contrast mechanism for ultrahigh-resolution optical microscopy with single-molecule sensitivity. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Phil. Trans. R. Soc. Lond. A |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
362 |
|
Part Detail:issue |
|
|
Part Number |
1817 |
|
Extent(unit="pages") |
|
|
Start |
881 |
|
End |
899 |
|
Genre(marcgt) |
periodical |
| Identifier | hec04 |
| Identifier:DOI | 10.1098/rsta.2003.1352 |
| Location | |
|
URL |
http://dx.doi.org/10.1098/rsta.2003.1352 |
| Title Information | |
|
Title |
Carbocyanine Dyes as Efficient Reversible Single-Molecule Optical Switch |
| Name:Personal | |
|
Name Part:given |
Mike |
|
Name Part:family |
Heilemann |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Emmanuel |
|
Name Part:family |
Margeat |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Robert |
|
Name Part:family |
Kasper |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Markus |
|
Name Part:family |
Sauer |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Philip |
|
Name Part:family |
Tinnefeld |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We demonstrate that commercially available unmodified carbocyanine dyes such as Cy5 (usually excited at 633 nm) can be used as efficient reversible single-molecule optical switch, whose fluorescent state after apparent photobleaching can be restored at room temperature upon irradiation at shorter wavelengths. Ensemble photobleaching and recovery experiments of Cy5 in aqueous solution irradiating first at 633 nm, then at 337, 488, or 532 nm, demonstrate that restoration of absorption and fluorescence strongly depends on efficient oxygen removal and the addition of the triplet quencher -mercaptoethylamine. Single-molecule fluorescence experiments show that individual immobilized Cy5 molecules can be switched optically in milliseconds by applying alternating excitation at 633 and 488 nm between a fluorescent and nonfluorescent state up to 100 times with a reliability of >90% at room temperature. Because of their intriguing performance, carbocyanine dyes volunteer as a simple alternative for ultrahigh-density optical data storage. Measurements on single donor/acceptor (tetramethylrhodamine/Cy5) labeled oligonucleotides point out that the described light-driven switching behavior imposes fundamental limitations on the use of carbocyanine dyes as energy transfer acceptors for the study of biological processes. |
| Subject | |
|
Topic |
green fluorescent protein |
|
Topic |
resonance energy-transfer |
|
Topic |
spectroscopy |
|
Topic |
system |
|
Topic |
microscopy |
|
Topic |
dynamics |
|
Topic |
dna |
|
Topic |
photochromism |
|
Topic |
excitation |
|
Topic |
terrylene |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Am. Chem. Soc. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
127 |
|
Part Detail:issue |
|
|
Part Number |
11 |
|
Extent(unit="pages") |
|
|
Start |
3801 |
|
End |
3806 |
|
Genre(marcgt) |
periodical |
| Identifier | hei05 |
| Identifier:DOI | 10.1021/ja044686x |
| Location | |
|
URL |
http://dx.doi.org/10.1021/ja044686x |
| Title Information | |
|
Title |
Nonlinear spectroscopy and picosecond transient grating study of colloidal gold |
| Name:Personal | |
|
Name Part:given |
E. J. |
|
Name Part:family |
Heilweil |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
R. M. |
|
Name Part:family |
Hochstrasser |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Measurements of the nonlinear dispersion of chi(3) have been performed on the surface plasmon resonance of aqueous colloidal gold. An analysis of the observed dispersion has revealed that the T1 and T2 lifetimes for the plasmon excitation are extremely rapid (<10-14 s) but the release of heat by the particle electron/thermal reservoir is slower (>2 ps). Picosecond time-resolved transient grating experiments on the same gold sol and organic dye solutions have confirmed that the nonradiative thermal decay of the metal particles occurs on the time scale of tens of picoseconds. The application of these methods to the study of ultrafast nonradiative relaxation mechanisms in molecular systems is discussed. |
| Subject | |
|
Topic |
colloids |
|
Topic |
gold |
|
Topic |
aqueous solutions |
|
Topic |
optical dispersion |
|
Topic |
nonlinear optics |
|
Topic |
optical susceptibility |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Chem. Phys. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
82 |
|
Part Detail:issue |
|
|
Part Number |
11 |
|
Extent(unit="pages") |
|
|
Start |
4762 |
|
End |
4770 |
|
Genre(marcgt) |
periodical |
| Identifier | hei85 |
| Identifier:DOI | 10.1063/1.448693 |
| Location | |
|
URL |
http://link.aip.org/link/?JCP/82/4762/1 |
|
URL |
http://dx.doi.org/10.1063/1.448693 |
| Title Information | |
|
Title |
Enhanced and inhibited visible spontaneous emission by atoms in a confocal resonator |
| Name:Personal | |
|
Name Part:given |
D. J. |
|
Name Part:family |
Heinzen |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
J. J. |
|
Name Part:family |
Childs |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
J. E. |
|
Name Part:family |
Thomas |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
M. S. |
|
Name Part:family |
Feld |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We report the alteration of visible spontaneous emission by atoms coupled to the degenerate modes of a confocal resonator. The partial emission rate into the resonator modes is enhanced by a factor of 19 when the resonator is tuned to the atomic transition frequency and inhibited by a factor of 42 when it is detuned. This results in a fractional increase of 1.6% and decrease of 0.5%, respectively, in the total spontaneous emission rate, which we verify by monitoring changes in the intensity of light emitted out the sides of the resonator as it is tuned. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Phys. Rev. Lett. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
58 |
|
Part Detail:issue |
|
|
Part Number |
13 |
|
Extent(unit="pages") |
|
|
Start |
1320 |
|
End |
1323 |
|
Genre(marcgt) |
periodical |
| Identifier | hei87 |
| Identifier:DOI | 10.1103/PhysRevLett.58.1320 |
| Location | |
|
URL |
http://dx.doi.org/10.1103/PhysRevLett.58.1320 |
| Title Information | |
|
Title |
Crystal Structure of Core Streptavidin Determined from Multiwavelength Anomalous Diffraction of Synchrotron Radiation |
| Name:Personal | |
|
Name Part:given |
Wayne A. |
|
Name Part:family |
Hendrickson |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Arno |
|
Name Part:family |
Pahler |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Janet L. |
|
Name Part:family |
Smith |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshinori |
|
Name Part:family |
Satow |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Ethan A. |
|
Name Part:family |
Merritt |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
R. Paul |
|
Name Part:family |
Phizackerley |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | A three-dimensional crystal structure of the biotin-binding core of streptavidin has been determined at 3.1- angstrom resolution. The structure was analyzed from diffraction data measured at three wavelengths from a single crystal of the selenobiotinyl complex with streptavidin. Streptavidin is a tetramer with subunits arrayed in D2 symmetry. Each protomer is an 8-stranded beta -barrel with simple up-down topology. Biotin molecules are bound at one end of each barrel. This study demonstrates the effectiveness of multiwavelength anomalous diffraction (MAD) procedures for macromolecular crystallography and provides a basis for detailed study of biotinavidin interactions. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Proc. Natl. Acad. Sci. USA |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
86 |
|
Part Detail:issue |
|
|
Part Number |
7 |
|
Extent(unit="pages") |
|
|
Start |
2190 |
|
End |
2194 |
|
Genre(marcgt) |
periodical |
| Identifier | hen89 |
| Identifier:DOI | 10.1073/pnas.86.7.2190 |
| Location | |
|
URL |
http://www.pnas.org/cgi/content/abstract/86/7/2190 |
|
URL |
http://dx.doi.org/10.1073/pnas.86.7.2190 |
| Title Information | |
|
Title |
The Cataphoresis of Suspended Particles. Part I. - The Equation of Cataphoresis |
| Name:Personal | |
|
Name Part:given |
D. C. |
|
Name Part:family |
Henry |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Proc. Roy. Soc. London A |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
133 |
|
Part Detail:issue |
|
|
Part Number |
821 |
|
Extent(unit="pages") |
|
|
Start |
106 |
|
End |
129 |
|
Genre(marcgt) |
periodical |
| Identifier | hen31 |
| Identifier:DOI | 10.1098/rspa.1931.0133 |
| Location | |
|
URL |
http://dx.doi.org/10.1098/rspa.1931.0133 |
| Title Information | |
|
Title |
Bioconjugate techniques |
| Name:Personal | |
|
Name Part:given |
Greg T. |
|
Name Part:family |
Hermanson |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre(bibtex) | book |
| Origin Information | |
|
Publisher |
Academic Press, San Diego |
|
Date Issued(encoding="marc") |
1996 |
|
Issuance |
monographic |
| Physical Description | |
|
Form(marcform) |
|
| Identifier | bookher96 |
| Identifier:ISSN | 0-12-342336-8 |
| Title Information | |
|
Title |
Fluorescence Lifetime Enhancement of Organic Chromophores Attached to Gold Nanoparticles |
| Name:Personal | |
|
Name Part:given |
Florencio E. |
|
Name Part:family |
Hernández |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Department of Chemistry, University of Central Florida, P. O. Box 162366, Orlando, Florida 32816-2366 |
| Name:Personal | |
|
Name Part:given |
Shenjiang |
|
Name Part:family |
Yu |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Department of Chemistry, University of Central Florida, P. O. Box 162366, Orlando, Florida 32816-2366 |
| Name:Personal | |
|
Name Part:given |
Marisol |
|
Name Part:family |
García |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Department of Chemistry, University of Central Florida, P. O. Box 162366, Orlando, Florida 32816-2366 |
| Name:Personal | |
|
Name Part:given |
Andrés D. |
|
Name Part:family |
Campiglia |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Department of Chemistry, University of Central Florida, P. O. Box 162366, Orlando, Florida 32816-2366 |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We present for the first time experimental evidence of fluorescence lifetime enhancement of organic chromophores attached to metal nanospheres via radiative decay engineering. The hybrid system (HS) was a modified "diconjugated" molecular probe, 4-acetamido-4'-maleimidylstilbene-2,2'-dithiol (AMDT), covalently bound to the surface of 5-nm-diameter Au nanospheres by its two sulfur atoms, at a distance d < 1 nm and with its molecular axis parallel to the surface of the nanoparticle surface. We measured a fluorescence lifetime increase of a factor of 2 at room temperature (AMDT = (4.32 ± 0.10) ns and HS = (8.73 ± 0.23) ns) and a factor of 3.4 at 4.2 K (AMDT = (2.64 ± 0.07) ns and HS = (7.96 ± 0.14) ns). We also found that the fluorescence quantum yield of this hybrid system is not reduced, proof of a weak energy transfer between the molecular probe and the nanoparticle. These results demonstrate that a molecular dipole oriented parallel to the metal surface tends to be reduced by the coupling with its image. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Phys. Chem. B |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
109 |
|
Part Detail:issue |
|
|
Part Number |
19 |
|
Extent(unit="pages") |
|
|
Start |
9499 |
|
End |
9504 |
|
Identifier:ISSN |
1520-6106 |
|
Genre(marcgt) |
periodical |
| Identifier | her05 |
| Identifier:DOI | 10.1021/jp050803e |
| Location | |
|
URL |
http://dx.doi.org/10.1021/jp050803e |
| Title Information | |
|
Title |
Surface-enhanced resonance Raman spectroscopy of Rhodamine 6G adsorbed on colloidal silver |
| Name:Personal | |
|
Name Part:given |
Peter |
|
Name Part:family |
Hildebrandt |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Manfred |
|
Name Part:family |
Stockburger |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | adsorption energies of dyes on Ag and Au |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Phys. Chem. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
88 |
|
Part Detail:issue |
|
|
Part Number |
24 |
|
Extent(unit="pages") |
|
|
Start |
5935 |
|
End |
5944 |
|
Genre(marcgt) |
periodical |
| Identifier | hil84 |
| Identifier:DOI | 10.1021/j150668a038 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/j150668a038 |
| Title Information | |
|
Title |
Rapid confirmation and revision of the primary structure of bovine serum albumin by ESIMS and frit-FAB LC/MS |
| Name:Personal | |
|
Name Part:given |
Kazuo |
|
Name Part:family |
Hirayama |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Satoko |
|
Name Part:family |
Akashi |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Mami |
|
Name Part:family |
Furuya |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Ken-ichi |
|
Name Part:family |
Fukuhara |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Incorrectness of the amino acid sequence of bovine serum albumin (BSA) was suggested from the observed molecular weight of BSA obtained by electrospray ionization mass spectrometry (ESIMS). Lack of a tyrosine residue in the position of 156th was found rapidly, by the combination of frit-fast atom bombardment mass spectrometry/liquid chromatography (Frit-FAB LC/MS), automated Edman degradation and tandem mass spectrometry (MS). Then it turned out that BSA is composed of 583 amino acid residues, and that its average molecular weight is not 66267.1, and it is corrected to 66430.3. Moreover the amino acid sequence of the positions of 94th and 95th was corrected to -QE- by using automated Edman degradation method. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Biochem. Biophys. Res. Comm. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
173 |
|
Part Detail:issue |
|
|
Part Number |
2 |
|
Extent(unit="pages") |
|
|
Start |
639 |
|
End |
646 |
|
Genre(marcgt) |
periodical |
| Identifier | hir90 |
| Identifier:DOI | 10.1016/S0006-291X(05)80083-X |
| Location | |
|
URL |
http://www.sciencedirect.com/science/article/B6WBK-4HM8G72-W/2/df1b708427b9d9b14e26c26c8e8b141b |
|
URL |
http://dx.doi.org/10.1016/S0006-291X(05)80083-X |
| Title Information | |
|
Title |
Photoinduced Charge Separation Reactions of J-Aggregates Coated on Silver Nanoparticles |
| Name:Personal | |
|
Name Part:given |
Jasmina |
|
Name Part:family |
Hranisavljevic |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Nada M. |
|
Name Part:family |
Dimitrijevic |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Gregory A. |
|
Name Part:family |
Wurtz |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Gary P. |
|
Name Part:family |
Wiederrecht |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The photochemistry of cyanine J-aggregates on the surface of colloidal Ag nanoparticles is reported. The photochemistry is initiated through ultrafast photoexcitation of the plasmon band in Ag nanoparticles, producing an enhanced near-field that interacts with the J-aggregate monolayer. Through transient absorption spectroscopy, we show that photoexcitation of the plasmon in Ag nanoparticles leads to exciton dynamics that differ strongly from J-aggregates alone or for J-aggregate monolayers on bulk metal surfaces. Specifically, charge-separated states with a lifetime of 300 ps between the J-aggregate and Ag colloid are formed. The reduction of the Ag nanoparticles is shown to be a multielectron process. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Am. Chem. Soc. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
124 |
|
Part Detail:issue |
|
|
Part Number |
17 |
|
Extent(unit="pages") |
|
|
Start |
4536 |
|
End |
4537 |
|
Genre(marcgt) |
periodical |
| Identifier | hra02 |
| Identifier:DOI | 10.1021/ja012263e |
| Location | |
|
URL |
http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/2002/124/i17/abs/ja012263e.html |
|
URL |
http://dx.doi.org/10.1021/ja012263e |
| Title Information | |
|
Title |
Persönliche Mitteilung |
| Name:Personal | |
|
Name Part:given |
Calin |
|
Name Part:family |
Hrelescu |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre(bibtex) | unpublished |
| Origin Information | |
|
Date Issued(encoding="marc") |
2008 |
|
Issuance |
monographic |
| Physical Description | |
|
Form(marcform) |
|
| Identifier | pchre08 |
| Title Information | |
|
Title |
Correlated topographic and spectroscopic imaging by combined atomic force microscopy and optical microscopy |
| Name:Personal | |
|
Name Part:given |
Dehong |
|
Name Part:family |
Hu |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Miodrag |
|
Name Part:family |
Micic |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Nicholas |
|
Name Part:family |
Klymyshyn |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yung Doug |
|
Name Part:family |
Suh |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
H. Peter |
|
Name Part:family |
Lu |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Near-field scanning microscopy is a powerful approach to obtain topographic and spectroscopic characterization simultaneously for imaging biological and nanoscale systems. To achieve optical imaging at high spatial resolution beyond the diffraction limit, aperture-less metallic scanning tips have been utilized to enhance the laser illumination local electromagnetic field at the apex of the scanning tips. In this paper, we discuss and review our work on combined fluorescence imaging with AFM-metallic tip enhancement, finite element method simulation of the tip enhancement, and their applications on AFM-tip enhanced fluorescence lifetime imaging (AFM-FLIM) and correlated AFM and FLIM imaging of the living cells. |
| Subject | |
|
Topic |
atomic force microscopy |
|
Topic |
fluorescence lifetime imaging |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Lumin. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
107 |
|
Part Detail:issue |
|
|
Part Number |
1-4 |
|
Extent(unit="pages") |
|
|
Start |
4 |
|
End |
12 |
|
Genre(marcgt) |
periodical |
| Identifier | hud04 |
| Identifier:DOI | 10.1016/j.jlumin.2003.12.045 |
| Location | |
|
URL |
http://dx.doi.org/10.1016/j.jlumin.2003.12.045 |
| Title Information | |
|
Title |
Correlated topographic and spectroscopic imaging beyond diffraction limit by atomic force microscopy metallic tip-enhanced near-field fluorescence lifetime microscopy |
| Name:Personal | |
|
Name Part:given |
Dehong |
|
Name Part:family |
Hu |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Miodrag |
|
Name Part:family |
Micic |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Nicholas |
|
Name Part:family |
Klymyshyn |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yung Doug |
|
Name Part:family |
Suh |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
H. Peter |
|
Name Part:family |
Lu |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | A near-field optical imaging approach is demonstrated for simultaneous topographic and spectroscopic imaging with spatial resolution beyond the optical diffraction limit. The method combines metallic-tip-based tapping-mode atomic force microscopy (AFM) with fluorescence lifetime imaging microscopy (FLIM). The AFM metallic tip was formed by sputter coating a Si tapping mode tip with Au, in a way that forms a globular tip apex. Such tip apex generates high local electric field enhancement under laser illumination, which provides a strong electric-field interaction between the AFM tip and the fluorescent molecules under the tip. The tip perturbation of fluorescence gives the fluorescence lifetime changes that provide the AFM-FLIM imaging contrast. A finite element method simulation was used to further evaluate the electric near-field enhancement and electric field distribution originating from the metallic Au-coated AFM tapping-mode tip. We have demonstrated that spatially mapping the change in fluorescence lifetime and intensity is a promising approach to spectroscopic imaging at an AFM spatial resolution typically defined by the apex diameter of the AFM tips. The globular Au-coated AFM tip not only gives adequate spatial AFM tapping-mode imaging spatial resolution but also is "environmentally friendly" to soft samples, such as polymeric dye-labeled nanospheres and even biological specimens such as POPO-3 labeled DNA. |
| Subject | |
|
Topic |
atomic force microscopy |
|
Topic |
radiative lifetimes |
|
Topic |
fluorescence |
|
Topic |
finite element analysis |
|
Topic |
silicon |
|
Topic |
gold |
|
Topic |
near-field scanning optical microscopy |
|
Topic |
biological techniques |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Rev. Sci. Instr. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
74 |
|
Part Detail:issue |
|
|
Part Number |
7 |
|
Extent(unit="pages") |
|
|
Start |
3347 |
|
End |
3355 |
|
Genre(marcgt) |
periodical |
| Identifier | hud03 |
| Identifier:DOI | 10.1063/1.1581359 |
| Location | |
|
URL |
http://dx.doi.org/10.1063/1.1581359 |
| Title Information | |
|
Title |
Quenching of [Ru(bpy)3]2+ Fluorescence by Binding to Au Nanoparticles |
| Name:Personal | |
|
Name Part:given |
Tao |
|
Name Part:family |
Huang |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Royce W. |
|
Name Part:family |
Murray |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Gold nanoparticles coated with stabilizing thiolate monolayers of N-(2-mercaptopropionyl)glycine (tiopronin) and N, N-trimethyl(undecylmercapto)ammonium quench the fluorescence of [Ru(bpy)3]2+ in aqueous solution. The tiopronin monolayer protected clusters (MPCs) exert energy-transfer quenching by both collisional quenching and by static quenching in electrostatic complexes formed between [Ru(bpy)3]2+ and the tiopronin carboxylate groups. The electrostatic binding is pH-dependent and can be released by addition of electrolyte (e.g., K+, Bu4N+, and Ca2+ salts, which are increasingly effective in the order given). The tiopronin MPC quenching of [Ru(bpy)3]2+ fluorescence follows Stern-Volmer relations for plots of Fo/F against MPC concentration and Fo/F against electrolyte concentration at constant MPC concentration. Quenching and electrolyte binding constants were derived. MPCs with average Au core diameters of 2.2 nm (average) exhibited quenching constants that are 20-fold larger than those for 1.8-nm diameter. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Langmuir |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
18 |
|
Part Detail:issue |
|
|
Part Number |
18 |
|
Extent(unit="pages") |
|
|
Start |
7077 |
|
End |
7081 |
|
Genre(marcgt) |
periodical |
| Identifier | hua02 |
| Identifier:DOI | 10.1021/la025948g |
| Location | |
|
URL |
http://pubs.acs.org/cgi-bin/abstract.cgi/langd5/2002/18/i18/abs/la025948g.html |
|
URL |
http://dx.doi.org/10.1021/la025948g |
| Title Information | |
|
Title |
Wildtype Core-Streptavidin with Biotin at 1.4A. |
| Name:Personal | |
|
Name Part:given |
D. E. |
|
Name Part:family |
Hyre |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
I. |
|
Name Part:family |
Le Trong |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
E. A. |
|
Name Part:family |
Merritt |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
N. M. |
|
Name Part:family |
Green |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
R. E. |
|
Name Part:family |
Stenkamp |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
P. S. |
|
Name Part:family |
Stayton |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre(bibtex) | misc |
| Origin Information | |
|
Date Issued(encoding="marc") |
2003 |
|
Issuance |
monographic |
| Physical Description | |
|
Form(marcform) |
|
| Identifier | pdb1mk5 |
| Identifier:DOI | 10.2210/pdb1mk5/pdb |
| Location | |
|
URL |
http://dx.doi.org/10.2210/pdb1mk5/pdb |
| Title Information | |
|
Title |
Near-field coupling of a single fluorescent molecule and a spherical gold nanoparticle |
| Name:Personal | |
|
Name Part:given |
T. |
|
Name Part:family |
Härtling |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
P. |
|
Name Part:family |
Reichenbach |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
L. M. |
|
Name Part:family |
Eng |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Near-field coupling of a single gold nanoparticle (GNP) to a single fluorescent molecule is investigated here for varying separation d between the two. While the emission quantum efficiency of the coupled system generally decreases for d!0, a pronounced near-field enhancement is observed under certain conditions, partly outweighing the efficiency loss at small distances. We report on optimizing these conditions by varying the excitation field direction and the three-dimensional relative configuration between the GNP and the fluorophore. Furthermore, we examine how the sphere diameter, the surrounding medium, as well as the absorption and emission wavelengths of the molecular dipole influence the fluorescence yield. Our results are of high practical relevance for all GNP-mediated application fields such as fluorescence microscopy, scattering near-field optical microscopy, bioanalytics, and medical applications. |
| Subject | |
|
Topic |
Fluorescence microscopy |
|
Topic |
Surface plasmons |
|
Topic |
Fluorescence |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Opt. Express |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
15 |
|
Part Detail:issue |
|
|
Part Number |
20 |
|
Extent(unit="pages") |
|
|
Start |
12806 |
|
End |
12817 |
|
Genre(marcgt) |
periodical |
| Identifier | hae07 |
| Location | |
|
URL |
http://www.opticsexpress.org/abstract.cfm?URI=oe-15-20-12806 |
| Title Information | |
|
Title |
High Precision Cell Surgery with Nanoparticles? |
| Name:Personal | |
|
Name Part:given |
G. |
|
Name Part:family |
Hüttmann |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
B. |
|
Name Part:family |
Radt |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
J. |
|
Name Part:family |
Serbin |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
B. I. |
|
Name Part:family |
Lange |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
R. |
|
Name Part:family |
Birngruber |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Irradiation of nanoabsorbers with pico- and nanosecond laser pulses could result in thermal effects with a spatial confinement of less than 50 nm. Therefore absorbing nanoparticles may be used for creating controlled intracellular effects. Conjugates of colloidal gold and alkaline phosphatase (aP) are presented as a model system for investigating protein inactivation in the vicinity of strongly absorbing nanoparticles. aP was coupled either directly or via antibodies to 15 nm gold particles. These conjugates were irradiated with picosecond pulses emitted by a frequency doubled Nd:YLF laser. Denaturation was detected as a loss of protein function with the help of a fluorescence assay. Irradiation with 104 pulses resulted in the inactivation of aP at an irradiance of 50 mJ/cm2 per pulse when the protein was coupled directly to the particles. With similar irradiation parameters a significant inactivation of aP which was coupled not directly but via two antibodies to the gold, was not observed. This shows that inactivating proteins with nanoabsorbers under irradiation with picosecond laser pulses is possible with a high spatial confinement. However, from these experiments it is difficult to determine whether the aP was destroyed thermally or whether it was inactivated by a photochemical reaction. Therefore, further experiments are needed to elucidate the damage mechanisms. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Medical Laser Application |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
17 |
|
Part Detail:issue |
|
|
Part Number |
1 |
|
Extent(unit="pages") |
|
|
Start |
9 |
|
End |
14 |
|
Genre(marcgt) |
periodical |
| Identifier | hue02 |
| Identifier:DOI | 10.1078/1615-1615-00039 |
| Location | |
|
URL |
http://dx.doi.org/10.1078/1615-1615-00039 |
| Title Information | |
|
Title |
Photoactive Three-Dimensional Monolayers: Porphyrin-Alkanethiolate-Stabilized Gold Clusters |
| Name:Personal | |
|
Name Part:given |
H. |
|
Name Part:family |
Imahori |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
M. |
|
Name Part:family |
Arimura |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
T. |
|
Name Part:family |
Hanada |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Y. |
|
Name Part:family |
Nishimura |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
I. |
|
Name Part:family |
Yamazaki |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Y. |
|
Name Part:family |
Sakata |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
S. |
|
Name Part:family |
Fukuzumi |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Related Item:Host | |
|
Title Information |
|
|
Title |
J. Am. Chem. Soc. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
123 |
|
Part Detail:issue |
|
|
Part Number |
2 |
|
Extent(unit="pages") |
|
|
Start |
335 |
|
End |
336 |
|
Genre(marcgt) |
periodical |
| Identifier | ima01b |
| Identifier:DOI | 10.1021/ja002838s |
| Location | |
|
URL |
http://dx.doi.org/10.1021/ja002838s |
| Title Information | |
|
Title |
Porphyrin Monolayer-Modified Gold Clusters as Photoactive Materials |
| Name:Personal | |
|
Name Part:given |
H. |
|
Name Part:family |
Imahori |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
S. |
|
Name Part:family |
Fukuzumi |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Porphyrin monolayer-modified gold clusters (three-dimensional system) have been prepared successfully. Their electrochemical and photophysical properties have been compared to those of the corresponding two-dimensional system of self-assembled monolayers (SAMs) of the porphyrin as well as the bis(porphyrin) disulfide reference in solutions. In particular, the time-resolved single-photon counting fluorescence studies have indicated that the undesirable quenching of the porphyrin excited singlet state via energy transfer to the gold surface of the three-dimensional system is much suppressed, as compared to the quenching of the porphyrin SAMs on the two-dimensional flat gold surface. Thus, the present systems have a variety of potential utility for development of the artificial photosynthetic materials, photocatalysts, and chemical and biochemical sensors using fluorescent chromophore-monolayer modified gold clusters. |
| Subject | |
|
Topic |
Fluorescence |
|
Topic |
Gold clusters |
|
Topic |
Photo-active materials |
|
Topic |
Porphyrins |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Adv. Mater. |
|
Origin Information |
|
|
Issuance |
continuing |
|
Part |
|
|
Part Detail:volume |
|
|
Part Number |
13 |
|
Part Detail:issue |
|
|
Part Number |
15 |
|
Extent(unit="pages") |
|
|
Start |
1197 |
|
End |
1199 |
|
Genre(marcgt) |
periodical |
| Identifier | ima01a |
| Identifier:DOI | 10.1002/1521-4095(200108)13:15<1197::AID-ADMA1197>3.0. CO;2-4 |
| Location | |
|
URL |
http://dx.doi.org/10.1002/1521-4095(200108)13:15<1197::AID-ADMA1197>3.0. CO;2-4 |
| Title Information | |
|
Title |
Structure and Photophysical Properties of Porphyrin-Modified Metal Nanoclusters with Different Chain Lengths |
| Name:Personal | |
|
Name Part:given |
Hiroshi |
|
Name Part:family |
Imahori |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yukiyasu |
|
Name Part:family |
Kashiwagi |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshiyuki |
|
Name Part:family |
Endo |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Takeshi |
|
Name Part:family |
Hanada |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshinobu |
|
Name Part:family |
Nishimura |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Iwao |
|
Name Part:family |
Yamazaki |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yasuyuki |
|
Name Part:family |
Araki |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Osamu |
|
Name Part:family |
Ito |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Shunichi |
|
Name Part:family |
Fukuzumi |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Three-dimensional porphyrin-monolayer-protected gold clusters with different chain lengths (MPCs) have been prepared to examine the structure and photophysical properties, in comparison with self-assembled monolayers (SAMs) of the porphyrins on a flat gold surface. The three-dimensional porphyrin MPCs exhibit electrochemical and photophysical properties that are much closer to those of a porphyrin reference compound in solution than those of two-dimensional porphyrin SAMs on the flat gold surface. The three-dimensional architectures of porphyrin MPCs with large surface area have improved the light-harvesting efficiency relative to the corresponding porphyrin SAM on the two-dimensional flat gold surface. Time-resolved single photon counting fluorescence and transient absorption spectroscopic studies have demonstrated that undesirable quenching of the porphyrin excited singlet state via energy transfer to the gold surface of the three-dimensional MPCs is much suppressed, as compared to the quenching of the porphyrin SAMs on the two-dimensional flat gold surface. Both the quenching rate constants of the porphyrin excited singlet state by the surfaces of bulk gold and gold nanoclusters reveal weak chain length dependence of the energy transfer quenching. |
| Related Item:Host | |
|
Title Information |
|
|
Title |
Langmuir |
|
Origin Information |
|
|
Issuance |
continuing |
|
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20 |
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Part Number |
1 |
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Extent(unit="pages") |
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Start |
73 |
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End |
81 |
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Genre(marcgt) |
periodical |
| Identifier | ima04 |
| Identifier:DOI | 10.1021/la035435p |
| Location | |
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URL |
http://dx.doi.org/10.1021/la035435p |
| Title Information | |
|
Title |
Chain Length Effect on the Structure and Photoelectrochemical Properties of Self-Assembled Monolayers of Porphyrins on Gold Electrodes |
| Name:Personal | |
|
Name Part:given |
Hiroshi |
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Name Part:family |
Imahori |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Hiroyuki |
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Name Part:family |
Norieda |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshinobu |
|
Name Part:family |
Nishimura |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Iwao |
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Name Part:family |
Yamazaki |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Kazuo |
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Name Part:family |
Higuchi |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Naohiko |
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Name Part:family |
Kato |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Tomoyoshi |
|
Name Part:family |
Motohiro |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Hiroko |
|
Name Part:family |
Yamada |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Koichi |
|
Name Part:family |
Tamaki |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Masatoshi |
|
Name Part:family |
Arimura |
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Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshiteru |
|
Name Part:family |
Sakata |
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Role |
|
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Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Disulfides, with a systematic series of alkyl spacers containing porphyrins at both terminals, were prepared to investigate the effect of the spacer length on the structure and photoelectrochemical properties of self-assembled monolayers (SAMs) of the porphyrins on a gold electrode. The structure of the SAMs was studied using ultraviolet (UV)-visible absorption spectroscopy in transmission mode, cyclic voltammetry, UV-visible ellipsometry, and fluorescence spectroscopy. These measurements showed that as the length of the spacers increases, the SAMs tend to form highly ordered structures on the gold electrodes. In addition, the structures of the monolayers vary depending on the even and odd number of the methylene spacers (n). From these measurements a porphyrin dimer model is proposed in that the two porphyrins take J-aggregate-like partially stacked structures in the monolayers. Photoelectrochemical studies were carried out in argon-saturated Na2SO4 aqueous solution containing methyl viologen as an electron carrier using the modified gold working electrode, a platinum wire counter electrode, and a Ag/AgCl reference electrode. The quantum yield increases in a zigzag fashion with an increase in the spacer length up to n equals 6 and then starts decreasing slightly as the chain lengths become longer. A plausible explanation for the photocurrent trend comes from the following points: (i) there are two competitive deactivation pathways for the excited singlet state of the porphyrin dimer, i.e., the quenching by the electrode via energy transfer and by the electron carrier via electron transfer, (ii) the porphyrin aggregation enhances the rate of nonradiative pathway in the excited state, and (iii) the electron transfer rate from the gold electrode to the resulting porphyrin cation radical decreases with an increase of the spacer lengths. These results will provide basic information for the construction of molecular assembly with photoactive function on surface. |
| Related Item:Host | |
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Title Information |
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Title |
J. Phys. Chem. B |
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Origin Information |
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Issuance |
continuing |
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Part |
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Part Detail:volume |
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Part Number |
104 |
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Part Detail:issue |
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Part Number |
6 |
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Extent(unit="pages") |
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Start |
1253 |
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End |
1260 |
|
Genre(marcgt) |
periodical |
| Identifier | ima00 |
| Identifier:DOI | 10.1021/jp992768f |
| Location | |
|
URL |
http://dx.doi.org/10.1021/jp992768f |
| Title Information | |
|
Title |
Light-Harvesting and Photocurrent Generation by Gold Electrodes Modified with Mixed Self-Assembled Monolayers of Boron-Dipyrrin and Ferrocene-Porphyrin-Fullerene Triad |
| Name:Personal | |
|
Name Part:given |
Hiroshi |
|
Name Part:family |
Imahori |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Hiroyuki |
|
Name Part:family |
Norieda |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Hiroko |
|
Name Part:family |
Yamada |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshinobu |
|
Name Part:family |
Nishimura |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Iwao |
|
Name Part:family |
Yamazaki |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Yoshiteru |
|
Name Part:family |
Sakata |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Shunichi |
|
Name Part:family |
Fukuzumi |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Three different kinds of mixed self-assembled monolayers have been prepared to mimic photosynthetic energy and electron transfer on a gold surface. Pyrene and boron-dipyrrin were chosen as a light-harvesting model. The mixed self-assembled monolayers of pyrene (or boron-dipyrrin) and porphyrin (energy acceptor model) reveal photoinduced singlet-singlet energy transfer from the pyrene (or boron-dipyrrin) to the porphyrin on the gold surface. The boron-dipyrrin has also been combined with a reaction center model, ferrocene-porphyrin-fullerene triad, to construct integrated artificial photosynthetic assemblies on a gold electrode using mixed monolayers of the respective self-assembled unit. The mixed self-assembled monolayers on the gold electrode have established a cascade of photoinduced energy transfer and multistep electron transfer, leading to the production of photocurrent output with the highest quantum yield (50 ± 8 reported for photocurrent generation at monolayer-modified metal electrodes and across artificial membranes using donor-acceptor linked molecules. The incident photon-to-current efficiency (IPCE) of the photoelectrochemical cell at 510 and 430 nm was determined as 0.6 and 1.6 example of an artificial photosynthetic system, which not only mimics light-harvesting and charge separation processes in photosynthesis but also acts as an efficient light-to-current converter in molecular devices. |
| Related Item:Host | |
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Title Information |
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Title |
J. Am. Chem. Soc. |
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Origin Information |
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Issuance |
continuing |
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Part |
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Part Detail:volume |
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Part Number |
123 |
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Part Detail:issue |
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Part Number |
1 |
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Extent(unit="pages") |
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Start |
100 |
|
End |
110 |
|
Genre(marcgt) |
periodical |
| Identifier | ima01c |
| Identifier:DOI | 10.1021/ja002154k |
| Location | |
|
URL |
http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/2001/123/i01/abs/ja002154k.html |
|
URL |
http://dx.doi.org/10.1021/ja002154k |
| Title Information | |
|
Title |
Optical characterisation of gold using surface plasmon-polaritons |
| Name:Personal | |
|
Name Part:given |
R A |
|
Name Part:family |
Innes |
|
Role |
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|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
J R |
|
Name Part:family |
Sambles |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Measurements are presented of the optical constants of a thin gold film over primarily the visible region of the spectrum using the surface plasmon-polariton resonance condition in the attenuated total-reflection configuration. Using this technique precise results are obtained and these are compared with those found using other experimental methods and also with the classical free-electron model. |
| Related Item:Host | |
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Title Information |
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Title |
J. Phys. F |
|
Origin Information |
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Issuance |
continuing |
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Part |
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Part Detail:volume |
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Part Number |
17 |
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Part Detail:issue |
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Part Number |
1 |
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Extent(unit="pages") |
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Start |
277 |
|
End |
287 |
|
Genre(marcgt) |
periodical |
| Identifier | inn87 |
| Identifier:DOI | 10.1088/0305-4608/17/1/031 |
| Location | |
|
URL |
http://stacks.iop.org/0305-4608/17/277 |
|
URL |
http://dx.doi.org/10.1088/0305-4608/17/1/031 |
| Title Information | |
|
Title |
Surface Enhanced Raman Scattering by Metal Spheres. I. Cluster Effect |
| Name:Personal | |
|
Name Part:given |
Masahiro |
|
Name Part:family |
Inoue |
|
Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Kazuo |
|
Name Part:family |
Ohtaka |
|
Role |
|
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Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | An electromagnetic theory for the light absorption by a cluster of metal spheres and the Raman scattering by a molecule adsorbed on it is presented, which takes into account the retardation effect exactly and is applicable to an arbitrary cluster size. The theory is applied to a two-sphere cluster of Ag and Au. It is shown that the absorption spectrum is doubly peaked and the maximum enhancement factor of the Raman intensity amounts to 10^7-10^8 when the distance between spheres is decreased. Absorption spectra of three- and four-sphere clusters are also calculated, which indicate that the essential features of the experimental observations are explained by the two-sphere cluster. |
| Related Item:Host | |
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Title Information |
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Title |
J. Phys. Soc. Jpn. |
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Origin Information |
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Issuance |
continuing |
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Part |
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Part Detail:volume |
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Part Number |
52 |
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Part Detail:issue |
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Part Number |
11 |
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Extent(unit="pages") |
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Start |
3853 |
|
End |
3864 |
|
Genre(marcgt) |
periodical |
| Identifier | ino89 |
| Identifier:DOI | 10.1143/JPSJ.52.3853 |
| Location | |
|
URL |
http://jpsj.ipap.jp/link?JPSJ/52/3853/ |
|
URL |
http://dx.doi.org/10.1143/JPSJ.52.3853 |
| Title Information | |
|
Title |
Photoinduced Charge Separation in a Fluorophore-Gold Nanoassembly |
| Name:Personal | |
|
Name Part:given |
Binil Itty |
|
Name Part:family |
Ipe |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
K. George |
|
Name Part:family |
Thomas |
|
Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Said |
|
Name Part:family |
Barazzouk |
|
Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Surat |
|
Name Part:family |
Hotchandani |
|
Role |
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Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Prashant V. |
|
Name Part:family |
Kamat |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | We report the first spectroscopic demonstration of direct electron transfer between a gold nanoparticle and a surface-bound fluorophore induced by pulsed laser irradiation. Binding of pyrene thiol directly to the gold nanoparticle results in quenching of its singlet excited state. The suppression of S1-T1 intersystem crossing process as well as the formation of pyrene radical cation confirm the excited-state interaction between the metal nanoparticle and the surface-bound fluorophore. The charge separation is sustained for several microseconds before undergoing recombination. |
| Related Item:Host | |
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Title Information |
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Title |
J. Phys. Chem. B |
|
Origin Information |
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Issuance |
continuing |
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Part |
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Part Detail:volume |
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Part Number |
106 |
|
Part Detail:issue |
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|
Part Number |
1 |
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Extent(unit="pages") |
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Start |
18 |
|
End |
21 |
|
Genre(marcgt) |
periodical |
| Identifier | ipe02 |
| Identifier:DOI | 10.1021/jp0134695 |
| Location | |
|
URL |
http://dx.doi.org/10.1021/jp0134695 |
| Title Information | |
|
Title |
Polarization dependences of surface plasmon bands and surface-enhanced Raman bands of single Ag nanoparticles |
| Name:Personal | |
|
Name Part:given |
T. |
|
Name Part:family |
Itoh |
|
Role |
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|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
K. |
|
Name Part:family |
Hashimoto |
|
Role |
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|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Y. |
|
Name Part:family |
Ozaki |
|
Role |
|
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Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | Polarization dependences of Rayleigh and surface-enhanced Raman scattering (SERS) were measured for individual Ag nanoparticles on which Rhodamine 6G molecules were adsorbed. It was found that the polarization dependencies of surface plasmon bands generated by the aggregation of SERS active Ag particles are well synchronous to those of Raman bands. This result strongly supports the recent electromagnetic SERS model that amplified electric field at particle junctions localized in the aggregate gives rise to SERS. |
| Related Item:Host | |
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Title Information |
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Title |
Appl. Phys. Lett. |
|
Origin Information |
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Issuance |
continuing |
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Part |
|
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Part Detail:volume |
|
|
Part Number |
83 |
|
Part Detail:issue |
|
|
Part Number |
11 |
|
Extent(unit="pages") |
|
|
Start |
2274 |
|
End |
2276 |
|
Genre(marcgt) |
periodical |
| Identifier | ito03 |
| Identifier:DOI | 10.1063/1.1604188 |
| Location | |
|
URL |
http://dx.doi.org/10.1063/1.1604188 |
| Title Information | |
|
Title |
Spontaneous assembly of subnanometre-ordered domains in the ligand shell of monolayer-protected nanoparticles |
| Name:Personal | |
|
Name Part:given |
Alicia M. |
|
Name Part:family |
Jackson |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Jacob W. |
|
Name Part:family |
Myerson |
|
Role |
|
|
Role Term:Text |
author |
| Name:Personal | |
|
Name Part:given |
Francesco |
|
Name Part:family |
Stellacci |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |
| Abstract | The properties of materials can be created and improved either by confining their dimensions in the nanoscale or by controlling their nanostructure. {W}e have combined these two concepts, and here we describe a new class of nanostructured nanosized materials that show ordered phase-separated domains at an unprecedented molecular length scale. {S}canning tunnelling and transmission electron microscope images of monolayer-protected metal nanoparticles, with ligand shells composed of a mixture of molecules, show that the ligands phase-separate into ordered domains as small as 5 {\AA}. {I}mportantly, the domain shape and dimensions can be controlled by varying the ligand composition or the metallic core size. {W}e demonstrate that the formation of ordered domains depends on the curvature of the underlying substrate, and that novel properties result from this nanostructuring. {F}or example, because the size of the domains is much smaller than the typical dimensions of a protein, these materials are extremely effective in avoiding non-specific adsorption of a variety of proteins. |
| Related Item:Host | |
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Title Information |
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Title |
Nat. Mat. |
|
Origin Information |
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Issuance |
continuing |
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Part |
|
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Part Detail:volume |
|
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Part Number |
3 |
|
Extent(unit="pages") |
|
|
Start |
330 |
|
End |
336 |
|
Genre(marcgt) |
periodical |
| Identifier | jac04 |
| Identifier:DOI | 10.1038/nmat1116 |
| Location | |
|
URL |
http://dx.doi.org/10.1038/nmat1116 |
| Title Information | |
|
Title |
Classical Electrodynamics |
| Name:Personal | |
|
Name Part:given |
John David |
|
Name Part:family |
Jackson |
|
Role |
|
|
Role Term:Text |
author |
| Type of Resource | text |
| Genre(bibtex) | book |
| Origin Information | |
|
Publisher |
John Wiley \& Sons, New York u. a. |
|
Date Issued(encoding="marc") |
1999 |
|
edition |
3. |
|
Issuance |
monographic |
| Physical Description | |
|
Form(marcform) |
|
| Identifier | bookjac99 |
| Identifier:ISSN |<PHONE_NUMBER>321 |
| Title Information | |
|
Title |
Universal Scaling of Plasmon Coupling in Metal Nanostructures: Extension from Particle Pairs to Nanoshells |
| Name:Personal | |
|
Name Part:given |
P. K. |
|
Name Part:family |
Jain |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400 |
| Name:Personal | |
|
Name Part:given |
M. A. |
|
Name Part:family |
El-Sayed |
|
Role |
|
|
Role Term:Text |
author |
|
affiliation |
Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400 |
| Type of Resource | text |
| Genre | journal article |
| Genre(bibtex) | article |
| Origin Information | |
|
Issuance |
monographic |