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Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
Article . 2004 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Roughened silver electrodes for use in metal-enhanced fluorescence

Authors: Chris D, Geddes; Alexandr, Parfenov; David, Roll; Ignacy, Gryczynski; Joanna, Malicka; Joseph R, Lakowicz;

Roughened silver electrodes for use in metal-enhanced fluorescence

Abstract

Roughened silver electrodes are widely used for surface-enhanced Raman scattering (SERS). We tested roughened silver electrodes for metal-enhanced fluorescence. Constant current between two silver electrodes in pure water resulted in the growth of fractal-like structures on the cathode. This electrode was coated with a monolayer of human serum albumin (HSA) protein that had been labeled with a fluorescent dye, indocyanine green (ICG). The fluorescence intensity of ICG-HSA on the roughened electrode increased by approximately 50-fold relative to the unroughened electrode, which was essentially non-fluorescent and increased typically two-fold as compared to the silver anode. No fractal-like structures were observed on the anode. Lifetime measurements showed that at least part of the increased intensity was due to an increased radiative decay rate of ICG. In our opinion, the use of in situ generated roughened silver electrodes will find multifarious applications in analytical chemistry, such as in fluorescence based assays, in an analogous manner to the now widespread use of SERS. To the best of our knowledge this is the first report of roughened silver electrodes for metal-enhanced fluorescence.

Keywords

Indocyanine Green, Silver, Spectrometry, Fluorescence, Surface Properties, Humans, In Vitro Techniques, Spectrum Analysis, Raman, Electrodes, Fluorescence, Serum Albumin, Fluorescent Dyes

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
32
Top 10%
Top 10%
Top 10%
bronze