Carbon nanotube-clamped metal atomic chain
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butterfly09 添加于 2010-8-23 00:56
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作 者
Tang DM, Yin LC, Li F, Liu C, Yu WJ, Hou PX, Wu B, Lee YH, Ma XL, Cheng HM 摘 要
Metal atomic chain (MAC) is an ultimate one-dimensional structure with unique physical properties, such as quantized conductance, colossal magnetic anisotropy, and quantized magnetoresistance. Therefore, MACs show great potential as possible components of nanoscale electronic and spintronic devices. However, MACs are usually suspended between two macroscale metallic electrodes; hence obvious technical barriers exist in the interconnection and integration of MACs. Here we report a carbon nanotube (CNT)-clamped MAC, where CNTs play the roles of both nanoconnector and electrodes. This nanostructure is prepared by in situ machining a metal-filled CNT, including peeling off carbon shells by spatially and elementally selective electron beam irradiation and further elongating the exposed metal nanorod. The microstructure and formation process of this CNT-clamped MAC are explored by both transmission electron microscopy observations and theoretical simulations. First-principles calculations indicate that strong covalent bonds are formed between the CNT and MAC. The electrical transport property of the CNT-clamped MAC was experimentally measured, and quantized conductance was observed.-
详细资料
- 文献种类: Journal Article
- 期刊名称: Proceedings of the National Academy of Sciences
- 期刊缩写: Proceedings of the National Academy of Sciences
- 期卷页: 2010年 第107卷 第20期 9055-9059页
- ISBN: 0027-8424
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学科领域 自然科学 » 化学
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