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Silver-doped sol–gel films as the substrate for surface-enhanced Raman scattering

✍ Scribed by Yuan-Hsiang Lee; Sheng Dai; Jack P. Young

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
320 KB
Volume
28
Category
Article
ISSN
0377-0486

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✦ Synopsis

A method was developed to prepare silver-doped sol-gel Ðlms for surface-enhanced Raman scattering (SERS) detection. The technique involves Ðrst doping silver ions as a silver ammine complex into a sol-gel [ Ag(NH 3 ) 2 ' ] matrix, followed by chemical reduction of the doped silver ions into the corresponding silver metal particles. The silver-doped sol-gel Ðlms coated on a glass substrate exhibit strong enhancement (24 000-fold) of Raman scattering from molecules adsorbed on the surface. Very stable SERS spectra of benzoic acid over a period of 48 h were obtained with the new silver substrate.

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