Attenuation of surface-enhanced Raman spectroscopy response in gold-platinum core-shell nanoparticles

Autor:	Nolan T. Flynn, Andrew A. Gewirth
Rok vydání:	2002
Předmět:	Analytical chemistry chemistry.chemical_element Surface-enhanced Raman spectroscopy Electrochemistry law.invention symbols.namesake chemistry Colloidal gold law symbols General Materials Science Electron microscope Raman spectroscopy Spectroscopy Platinum Bimetallic strip
Zdroj:	Journal of Raman Spectroscopy. 33:243-251
ISSN:	1097-4555 0377-0486
DOI:	10.1002/jrs.841
Popis:	Colloidal gold particles (11.2 nm) were coated with platinum overlayers, resulting in bimetallic particles with 1–8 mol% Pt. These particles were characterized using electron microscopy, energy-dispersive x-ray spectroscopy and electrochemistry confirming the Au–Pt core-shell structure. The UV–visible spectra showed only minimal red shifts with increasing Pt content. The Raman spectra, on the other hand, changed dramatically with slight increases in Pt, resulting in a loss of appreciable surface-enhancement effects by 4 mol% Pt. Copyright © 2002 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
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