Synthesis and characterization of ultra-long silica nanowires

被引:27
作者
Fang, XS [1 ]
Ye, CH [1 ]
Xie, T [1 ]
He, G [1 ]
Wang, YH [1 ]
Zhang, LD [1 ]
机构
[1] Chinese Acad Sci, Inst Solid Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2005年 / 80卷 / 02期
关键词
D O I
10.1007/s00339-004-2769-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Large-scale 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. X-ray photoelectron spectroscopy revealed that these nanowires consisted of Si and 0 elements in an atomic ratio of approximately 1 : 2, 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 rim, respectively, which also differs from the previous reports of the photoluminescence for oxygen-deficient silica nanowires. This may suggest that the fully oxidized silica nanowires still have many structural defects that contribute to the photoluminescence.
引用
收藏
页码:423 / 425
页数:3
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