Authors: XS Fang CH Ye T Xie G He YH Wang LD Zhang
Publish Date: 2005/02/01
Volume: 80, Issue: 2, Pages: 423-425
Abstract
Largescale synthesis of amorphous silica nanowires was achieved by using simple physical evaporation of a mixture of Si and Al2O3 powders Scanning electron microscopy observations showed that the silica nanowires have lengths of several mm and diameters of 20–100 nm Xray photoelectron spectroscopy revealed that these nanowires consisted of Si and O elements in an atomic ratio of approximately 12 consistent with the stoichiometric formula SiO2 Photoluminescence measurements showed a blue luminescence band in the wavelength range of 400–500 nm with three peaks at 420 nm 440 nm and 470 nm respectively which also differs from the previous reports of the photoluminescence for oxygendeficient silica nanowires This may suggest that the fully oxidized silica nanowires still have many structural defects that contribute to the photoluminescence
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