Translator Disclaimer
13 October 1994 Optical materials for surface-enhanced Raman applications based on sol-gel encapsulated gold particles
Author Affiliations +
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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fatemeh Akbarian, Bruce S. Dunn, and Jeffrey I. Zink "Optical materials for surface-enhanced Raman applications based on sol-gel encapsulated gold particles", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.188944
PROCEEDINGS
5 PAGES


SHARE
Advertisement
Advertisement
Back to Top