Paper Title:
Preparation and Photoluminescence Properties of Tadpole-Like Amorphous Silica Nanowires
  Abstract

Tadpole-like microstructures which consisted of silica nanowires have been synthesized on Si wafers at 950°C by using tin droplets as catalyst. Each tin droplet can simultaneously catalyzes the growth of many silica nanowires of each tadpole-like microstructure and can simultaneously catalyzes the growth of even two tadpole-like microstructures, which is quite different from the conventional vapor-liquid-solid process. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that the tadpole-like microstructures with diameters of 5 μm and lengths of up to 50-100 μm. The amorphous silica nanowires with a composition close to that of SiO2 have diameters of 100–200 nm. The PL spectra of the SiO2 nanowires shows a strong emission peak centered at 390 nm (3.18 eV), while two weak PL peaks at 323 nm (3.84 eV), and 455 nm (2.73 eV) can also be observed. The growth mechanism of the tadpole-like microstructures was also investigated.

  Info
Periodical
Advanced Materials Research (Volumes 194-196)
Edited by
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
Pages
614-617
DOI
10.4028/www.scientific.net/AMR.194-196.614
Citation
Z. F. Ni, Y. G. Wang, "Preparation and Photoluminescence Properties of Tadpole-Like Amorphous Silica Nanowires", Advanced Materials Research, Vols. 194-196, pp. 614-617, 2011
Online since
February 2011
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Price
$32.00
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