Synthesis of Y-junction single-wall carbon nanotubes
Synthesis of Y-junction single-wall carbon nanotubes
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DOI：
10.1016/j.carbon.2005.05.020
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发表时间：
2005-11-01
期刊：
影响因子：
10.9
通讯作者：
Choi, WB
中科院分区：
文献类型：
--
作者：
Choi, YC;Choi, WB
采用化学气相沉积法制备了Y型单壁碳纳米管。以氧化铝颗粒为载体的掺钼铁纳米颗粒为催化剂，生长了Y结单壁碳纳米管。Mo掺杂Fe颗粒的分布对Y结的形成起着重要的作用。透射电子显微镜证实了直径为2-5 nm的Y-结的单壁结构的形成。拉曼光谱中的径向呼吸模式峰表明，我们的样品既有金属和半导体纳米管，表明可能形成的Y-分支具有不同的电性能。分支和主干的不同电学性质可用于纳米级三端电子器件。提出了Y结单壁碳纳米管的生长机理。(C)2005爱思唯尔有限公司保留所有权利。
Y-junction single-wall carbon nanotubes (SWNTs) are synthesized using controlled catalysts by chemical vapor deposition. Mo-doped Fe nanoparticles supported by aluminum oxide particles are used as catalysts for growing Y-junction single-wall carbon nanotubes. Distribution of Mo-doped Fe particles plays an important role in Y-junction formation. Transmission electron microscopy confirmed the formation of single-walled structures of Y-junctions with diameters of 2-5 nm. Radial breathing mode peaks in Raman spectra show that our sample has both metallic and semiconducting nanotubes, indicating the possible formation of Y-branching with different electrical properties. The different electrical properties of branch and stem can be utilized in nanoscale three terminal electronic devices. The growth mechanism of Y-junction SWNTs is proposed. (C) 2005 Elsevier Ltd. All rights reserved.