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Template-free electrosynthesis of crystalline germanium nanowires from solid germanium oxide in molten CaCl2-NaCl
H. Y. Yin; W. Xiao; X. H. Mao; W. F. Wei; H. Zhu; D. H. Wang
2013
Source PublicationElectrochimica Acta
ISSN0013-4686
Volume102Pages:369-374
AbstractGermanium nano-materials are attractive due to their potential application prospects in electronic, information and energy industry. Herein we report a one-step preparation of crystalline germanium nanowires (Ge-NWs) by direct electrochemical reduction of solid GeO2 in molten CaCl2-NaCl at 600 degrees C with a current efficiency of similar to 86% and an energy consumptions as low as 3.26 kW h (kg Ge)(-1). The cyclic voltammogram of the GeO2-filled cavity electrode shows that the onset electroreduction potential of GeO2 is -1.0 V vs. Ag/Ag+, much more positive than the reduction potential of cations in the melt. The as-prepared Ge-NWs are of high aspect ratio, high purity and good crystallinity according to the XRD, EDX, SEM and TEM characterizations. The present approach provides a simple and short process for the production of Ge-NWs from a cost-affordable germanium precursor (GeO2). The potential applications of the obtained Ge for photodetector and infrared optical window have been also investigated by Raman and FT-IR measurements. (C) 2013 Elsevier Ltd. All rights reserved.
description.department[yin, huayi ; xiao, wei ; mao, xuhui ; zhu, hua ; wang, dihua] wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china. [wei, weifeng] cent s univ, powder met res inst, changsha 410083, hunan, peoples r china. [wang, dihua] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; wang, dh (reprint author), wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china. ; wangdh@whu.edu.cn
KeywordElectrosynthesis Ge Nanowires Molten Salt Electrochemistry Solid-state Electrochemistry Direct Electrolytic Reduction Field-effect Transistors Electrochemical Reduction 3-phase Interlines Calcium-chloride Silicon Nanowires Tungsten Powder Sio2 Pellets Growth Dioxide
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71649
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
H. Y. Yin,W. Xiao,X. H. Mao,et al. Template-free electrosynthesis of crystalline germanium nanowires from solid germanium oxide in molten CaCl2-NaCl[J]. Electrochimica Acta,2013,102:369-374.
APA H. Y. Yin,W. Xiao,X. H. Mao,W. F. Wei,H. Zhu,&D. H. Wang.(2013).Template-free electrosynthesis of crystalline germanium nanowires from solid germanium oxide in molten CaCl2-NaCl.Electrochimica Acta,102,369-374.
MLA H. Y. Yin,et al."Template-free electrosynthesis of crystalline germanium nanowires from solid germanium oxide in molten CaCl2-NaCl".Electrochimica Acta 102(2013):369-374.
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