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Proceedings Paper

Optical materials for surface-enhanced Raman applications based on sol-gel encapsulated gold particles
Author(s): Fatemeh Akbarian; Bruce S. Dunn; Jeffrey I. Zink
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Paper Abstract

A photochemical method of producing nanometer gold particles in optically transparent sol-gel silicate materials is described. Organometallic gold precursor compounds are dissolved in the sol and encapsulated in the growing silicate network. Irradiation of the doped monoliths with ultraviolet light causes the photodeposition of gold particles within the silica gel or xerogel. The particles are characterized by their electronic absorption spectra and by TEM. The transparent, porous monoliths are excellent substrates for surface enhanced Raman spectroscopy (SERS). Small molecules such as pyrazine diffuse into the monoliths and are detected by using SERS. The sol-gel matrix stabilizes the gold particles (in comparison to colloids in liquid media) and SERS can be used to detect molecules that penetrate the matrix.

Paper Details

Date Published: 13 October 1994
PDF: 5 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188944
Show Author Affiliations
Fatemeh Akbarian, Univ. of California/Los Angeles (United States)
Bruce S. Dunn, Univ. of California/Los Angeles (United States)
Jeffrey I. Zink, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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