Preferred orientations of encapsulated C60 molecules inside single wall carbon nanotubes |
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Authors: | Yao Zhen Liu Ran Ma Feng-Xian Lu Shuang-Chen Tian Fu-Bo Duan De-Fang Cui Tian Liu Bing-Bing |
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Affiliation: | State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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Abstract: | A systematical study of the orientational behavior of C60 molecules in single wall carbon nanotubes (SWCNTs) with different chirality and diameter has been performed by using a model of an infinite long nanotube filled with two C60 (denoted as C60-1 and C60-2) molecules. We studied the preferred orientation of the C60-1 molecule when the neighboring C60-2 molecule was fixed at the pentagon, double-bond, and hexagon orientations respectively. Our results showed that the C60-1 molecule prefers the pentagon (hexagon) orientation when the tube diameter is smaller (larger) than 1.31nm (1.36nm). For the tube diameter in between, the preferred molecular orientation of C60-1 changes from pentagon to hexagon with the increasing tube diameter when the neighboring C60-2 molecule is fixed at the pentagon or double-bond orientation. A novel vertex orientation for the C60-1 molecule has been found when the C60-2 molecule is fixed at the hexagon orientation. |
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Keywords: | peapod C60 nanotube orientation |
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