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A new surface‐enhanced Raman scattering substrate based on silver nanoparticles in sol–gel
Author(s) -
Volkan M.,
Stokes D. L.,
VoDinh T.
Publication year - 1999
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199912)30:12<1057::aid-jrs474>3.0.co;2-0
Subject(s) - silver nanoparticle , silver nitrate , raman scattering , substrate (aquarium) , chloride , silver chloride , raman spectroscopy , nanoparticle , chemistry , inorganic chemistry , precipitation , chemical engineering , materials science , nuclear chemistry , nanotechnology , organic chemistry , optics , physics , oceanography , electrode , engineering , geology , meteorology
We report for the first time the development of a new surface‐enhanced Raman scattering (SERS)‐active silver chloride silica–glass substrate prepared by using in situ precipitation of silver chloride particles in sol–gel films as a precursor for nanoparticles of silver. The controlled precipitation of silver chloride was achieved by the reaction of silver nitrate with trichloroacetic acid, which leads to a slow release of chloride ions. Silver chloride particles were reduced to silver nanoparticles by FeSO 4 ·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 coating conditions were performed and are discussed in detail. The performance of this new substrate compares favorably with those of previously developed silver‐coated alumina substrates. The SERS spectra of other compounds of environmental and biological interest, such as 1−aminonaphthalene, 2−aminopyrimidine, pyridine and p$‐aminobenzoic acid, were investigated to illustrate the usefulness of this novel type of SERS substrate for use in chemical and biological analysis. Copyright © 1999 John Wiley & Sons, Ltd.