A new surface-enhanced Raman scattering substrate based on silver nanoparticles in sol-gel

Citation
M. Volkan et al., A new surface-enhanced Raman scattering substrate based on silver nanoparticles in sol-gel, J RAMAN SP, 30(12), 1999, pp. 1057-1065
Citations number
37
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF RAMAN SPECTROSCOPY
ISSN journal
03770486 → ACNP
Volume
30
Issue
12
Year of publication
1999
Pages
1057 - 1065
Database
ISI
SICI code
0377-0486(199912)30:12<1057:ANSRSS>2.0.ZU;2-O
Abstract
We report for the first time the development of a new surface-enhanced Rama n scattering (SERS)-active silver chloride silica-glass substrate prepared by using in situ precipitation of silver chloride particles in sol-gel film s as a precursor for nanoparticles of silver. The controlled precipitation of silver chloride was achieved by the reaction of silver nitrate with tric hloroacetic acid, which leads to a slow release of chloride ions. Silver ch loride particles were reduced to silver nanoparticles by FeSO4. 7H(2)O. The sol-gel films prepared exhibit good optical properties and induce a strong SERS effect for several model compounds, including cresyl fast violet and brilliant cresyl blue. Optimization studies of substrate preparation and co ating conditions were performed and are discussed in detail. The performanc e of this new substrate compares favorably with those of previously develop ed silver-coated alumina substrates, The SERS spectra of other compounds of environmental and biological interest, such as 1-aminonaphthalene, 2-amino pyrimidine, pyridine and p-aminobenzoic acid, were investigated to illustra te the usefulness of this novel type of SERS substrate for use in chemical and biological analysis. Copyright (C) 1999 John Whey & Sons, Ltd.