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Abstract
Biomorphic SiO2 fibers were synthesized with cotton tissue as the template and with cetyltrimethylammonium bromide (CTAB) as surfactant through a surface sol-gel process. The as-prepared samples retain well the original morphology of cotton and show a uniform and large amount of nanopores. Sliver nanoparticles were successfully incorporated into the nanopores through impregnation and chemical reduction to form SiO2/Ag composite fibers. Ag nanoparticles with mean diameter approximately 3 nm have a size distribution in accordance with the nanoporosity of SiO2 matrix. Such composite fibers show prominent surface plasma resonance (SPR) effect, and during heat treatment under increasing temperatures, the SPR intensity is enhanced because of the size effect, and the SPR position undergoes a redshift first and then a blueshift.
Published Version
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