在水中形成的富勒烯豆荚和空的单壁碳纳米管的螺旋超结构。

Helical superstructures of fullerene peapods and empty single-walled carbon nanotubes formed in water.

作者信息

Nakashima Naotoshi, Tanaka Yasuhiko, Tomonari Yasuhiko, Murakami Hiroto, Kataura Hiromichi, Sakaue Takahiro, Yoshikawa Kenichi

机构信息

Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan.

出版信息

J Phys Chem B. 2005 Jul 14;109(27):13076-82. doi: 10.1021/jp050958m.

DOI:10.1021/jp050958m

PMID:16852626

Abstract

Aqueous dispersions of fullerene C70-filled carbon nanotubes (C70@SWNTs or peapods) and empty single-walled carbon nanotubes (empty SWNTs) were prepared with the aid of trimethyl-(2-oxo-2-pyrene-1-yl-ethyl)-ammonium bromide (1), which is a carbon nanotube solubilizer. This is the first report describing the preparation and characterization of the transparent dispersion/dissolution of the peapods. The UV-vis-near-IR spectra of C70@SWNTs-1 and empty SWNTs-1 were almost identical. We found by means of transmission electron microscopy and atomic force microscopy that the empty SWNTs and C70-peapods form helical nanostructures in the shapes of rings, irregular rings, lassos, handcuffs, catenanes, pseudorotaxanes, and figure-eight structures. The mechanism of the superstructure formation has been discussed in relation to the unique characteristics of stiff polymer chains with the aid of an off-lattice Monte Carlo simulation.

摘要

借助碳纳米管增溶剂三甲基-(2-氧代-2-芘-1-基-乙基)-溴化铵(1)制备了富勒烯C70填充的碳纳米管( C70@SWNTs或豆荚状结构)和空的单壁碳纳米管(空的SWNTs)的水分散体。这是第一篇描述豆荚状结构透明分散体/溶液的制备和表征的报告。C70@SWNTs-1和空的SWNTs-1的紫外-可见-近红外光谱几乎相同。我们通过透射电子显微镜和原子力显微镜发现，空的SWNTs和C70-豆荚状结构形成了环状、不规则环状、套索状、手铐状、连环状、准轮烷状和数字8结构的螺旋纳米结构。借助非晶格蒙特卡罗模拟，已结合刚性聚合物链的独特特性讨论了超结构形成的机制。