Helical superstructures of fullerene peapods and empty single-walled carbon nanotubes formed in water
Helical superstructures of fullerene peapods and empty single-walled carbon nanotubes formed in water
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DOI：
10.1021/jp050958m
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发表时间：
2005-07-14
影响因子：
3.3
通讯作者：
Yoshikawa, K
中科院分区：
文献类型：
--
作者：
Nakashima, N;Tanaka, Y;Yoshikawa, K
借助于作为碳纳米管增溶剂的三甲基-（2-氧代-2-芘-1-乙基）-溴化铵（1），制备富勒烯C-70填充的碳纳米管（C-70@SWNT或豆荚）和空单壁碳纳米管（空SWNT）的水分散体。这是第一个报告描述的制备和表征的透明分散体/溶解的豌豆。C70 @ SWNTs-I和空SVvINT-I的紫外-可见-近红外光谱几乎相同。我们发现，通过透射电子显微镜和原子力显微镜，空的单壁碳纳米管和C-70-peapod形成螺旋纳米结构的形状的环，不规则环，套索，手铐，索烃，伪轮烷，和数字8结构。超结构形成的机制进行了讨论，在刚性聚合物链的独特特性与援助的非格子蒙特卡罗模拟。
Aqueous dispersions of fullerene C-70-filled carbon nanotubes (C-70@SWNTs or peapods) and empty single-walled carbon nanotubes (empty SWNTs) were prepared with the aid of trimethyl-(2-oxo-2-pyrene-1-ylethyl)-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 SVvINTs-1 were almost identical. We found by means of transmission electron microscopy and atomic force microscopy that the empty SWNTs and C-70-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.