✦ LIBER ✦

A catalyst-free method to silicon nanowires at relative low temperature

✍ Scribed by Hui-Ling Zhu; Ning Lun; Zheng Zhang; Rui Liu; Xiang-Lin Meng; Bo Zhang; Fu-Dong Han; Yu-Jun Bai; Jian-Qiang Bi; Run-Hua Fan

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 548 KB
Volume: 312
Category: Article
ISSN: 0022-0248
DOI: 10.1016/j.jcrysgro.2010.09.063

No coin nor oath required. For personal study only.

✦ Synopsis

Well-crystallized straight Si nanowires (SiNWs) were successfully prepared in large scale via a facile reaction between NaN 3 and Na 2 SiF 6 at 600 1C without using any catalyst. Characterization by X-ray powder diffraction and transmission electron microscopy demonstrates that the as-obtained product is pure-phase cubic SiNWs with diameters of 40 nm or so, and lengths of several micrometers. And the SiNWs with spherical tips can be obtained at a temperature as low as 300 1C. Heating temperature and holding time have crucial influence on the synthesis and morphology of the SiNWs. An oxide-assisted growth mechanism is responsible for the formation of the SiNWs.

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