Control of Lateral Dimension in Metal-Catalyzed Germanium Nanowire Growth: Usage of Carbon Sheath
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- 作者：Byung-Sung Kim ; Min Jin Kim ; Jong Cheol Lee ; Sung Woo Hwang ; Byoung Lyong Choi ; Eun Kyung Lee ; Dongmok Whang
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：August 8, 2012
- 年：2012
- 卷：12
- 期：8
- 页码：4007-4012
- 全文大小：371K
- 年卷期：v.12,no.8(August 8, 2012)
- ISSN：1530-6992
文摘
We report on the catalytic growth of thin carbon sheathed single crystal germanium nanowires (GeNWs), which can solve the obstacles that have disturbed a wide range of applications of GeNWs. Single crystal Ge NW core and amorphous carbon sheath are simultaneously grown via vapor鈥搇iquid鈥搒olid (VLS) process. The carbon sheath completely blocks unintentional vapor deposition on NW surface, thus ensuring highly uniform diameter, dopant distribution, and electrical conductivity along the entire NW length. Furthermore, the sheath not only inhibits metal diffusion but also improves the chemical stability of GeNWs at even high temperatures.