Soluble self-doped single-walled carbon nanotube
Soluble self-doped single-walled carbon nanotube
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DOI：
10.1016/s0167-577x(03)00577-9
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发表时间：
2004-02-01
影响因子：
3
通讯作者：
Yamamoto, T
中科院分区：
文献类型：
--
作者：
Yamaguchi, I;Yamamoto, T
单壁碳纳米管（SWNT）的开放端含有羧酸氯化物基团，SWNT-(COCl)(n)与聚乙烯亚胺（PEI）处理后，导致COCl基团与PEI的胺基之间发生酰胺化反应，得到功能化的SWNT。产物在氯仿1和氯仿2中分别分离为可溶部分和不溶部分。IR数据显示，所有的COCl基团都与PEI的胺基反应生成1，而未反应的COCl基团则保留在2中。1在溶液中具有光致发光和电化学活性。1的电子自旋共振（ESR）谱表明在PEI的N个原子上形成了一个自由基阳离子。制备了一个电结Pt/P3HexTh/1/Hg，其中P3HexTh是通常显示p型导电性能的聚（3-己基噻吩）。该结显示电流的整流，这种整流归因于P3HexTh和1之间形成的pn结。这些数据支持了1作为n型导电材料的观点。研究了1和2的光学和热性质。(C) 2003 Elsevier B.V.版权所有
Treatment of single-walled carbon nanotube (SWNT) having carboxylic acid chloride groups at the open end, SWNT-(COCl)(n), with polyethyleneimine (PEI) caused amidation reaction between the COCl group and the amine groups of PEI to give functionalized SWNTs. The products were separated into soluble and insoluble parts in chloroform, 1 and 2, respectively. IR data revealed that all the COCl groups reacted with amine groups of PEI to provide 1, whereas unreacted COCl groups remained in 2. 1 was photoluminescent and electrochemically active in the solution. Electron spin resonance (ESR) spectrum of 1 indicated formation of a radical cation on N atoms of PEI. An electric junction, Pt/P3HexTh/1/Hg, where P3HexTh is poly(3-hexylthiphene) which usually shows p-type electrically conducting properties, was fabricated. The junction shows rectification of electric current, and this rectification is attributed to the formation of a p-n junction between P3HexTh and 1. These data supported a view that 1 served as an n-type electrically conducting material. Optical and thermal properties of 1 and 2 were also investigated. (C) 2003 Elsevier B.V. All rights reserved.