Detailed Information

Cited 2 time in webofscience Cited 3 time in scopus
Metadata Downloads

Surface characteristics of Ag-doped Au nanoparticles probed by Raman scattering spectroscopy

Authors
Kim, KwanKim, Kyung LockShin, Kuan Soo
Issue Date
Feb-2012
Publisher
WILEY-BLACKWELL
Keywords
Ag-doped Au; surface enrichment; surface-enhanced Raman scattering; 2; 6-dimethylphenylisocyanide; 4-nitrobenzenethiol
Citation
JOURNAL OF RAMAN SPECTROSCOPY, v.43, no.2, pp.228 - 236
Journal Title
JOURNAL OF RAMAN SPECTROSCOPY
Volume
43
Number
2
Start Page
228
End Page
236
URI
http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/12506
DOI
10.1002/jrs.3027
ISSN
0377-0486
Abstract
We have examined the surface characteristics of Ag-doped Au nanoparticles (below 5 mol% of Ag) by means of the surface-enhanced Raman scattering (SERS) of 2,6-dimethylphenylisocyanide (2,6-DMPI) and 4-nitrobenzenethiol (4-NBT). When Ag was added to Au to form similar to 35-nm-sized alloy nanoparticles, the surface plasmon resonance band was blue-shifted linearly from 523 to 517 nm in proportion to the content of Ag up to 5%. In the SERS spectra of 2,6-DMPI, the N-C stretching peak also shifted almost linearly from 2184 to 2174 cm-1 when the Ag content was 5 mol% or less; the peak then remained the same as that of the pure Ag film. The potential variation of the SERS spectrum of 2,6-DMPI in an electrochemical environment, as well as the effect of organic vapor, also showed a similar tendency. From the SERS of 4-NBT, we confirmed the occurrence of a surface-induced photoreaction converting 4-NBT to 4-aminobenzenethiol, when Ag was added to Au to form alloy nanoparticles. The photoreaction induction ability also increased linearly with the Ag content, reaching a plateau level at 5 mol% of Ag. All these observations suggest that the surface content of Ag should increase almost linearly as a function of the overall mole fraction of Ag and, once the Au/Ag nanoparticles reach 5 mol% of Ag, their surfaces are fully covered with Ag, showing the same surface characteristics of pure Ag nanoparticles. Copyright (C) 2011 John Wiley & Sons, Ltd.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Natural Sciences > Department of Chemistry > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Shin, Kuan Soo photo

Shin, Kuan Soo
College of Natural Sciences (Department of Chemistry)
Read more

Altmetrics

Total Views & Downloads

BROWSE