中国物理B ›› 2013, Vol. 22 ›› Issue (7): 76101-076101.doi: 10.1088/1674-1056/22/7/076101

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Preferred orientations of encapsulated C60 molecules inside single wall carbon nanotubes

姚震, 刘然, 马凤仙, 路双臣, 田夫波, 段德芳, 崔田, 刘冰冰   

  1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2013-03-13 修回日期:2013-03-20 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB808200), the National Natural Science Foundation of China (Grant Nos. 10979001, 51025206, 51032001, and 21073071), and the Cheung Kong Scholars Programme of China.

Preferred orientations of encapsulated C60 molecules inside single wall carbon nanotubes

Yao Zhen (姚震), Liu Ran (刘然), Ma Feng-Xian (马凤仙), Lu Shuang-Chen (路双臣), Tian Fu-Bo (田夫波), Duan De-Fang (段德芳), Cui Tian (崔田), Liu Bing-Bing (刘冰冰)   

  1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2013-03-13 Revised:2013-03-20 Online:2013-06-01 Published:2013-06-01
  • Contact: Liu Bing-Bing E-mail:liubb@jlu.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB808200), the National Natural Science Foundation of China (Grant Nos. 10979001, 51025206, 51032001, and 21073071), and the Cheung Kong Scholars Programme of China.

摘要: 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 1.31 nm (1.36 nm). 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.

关键词: peapod, C60, nanotube, orientation

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 1.31 nm (1.36 nm). 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.

Key words: peapod, C60, nanotube, orientation

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
61.48.-c (Structure of fullerenes and related hollow and planar molecular structures) 67.30.ef (Thermodynamics) 73.20.At (Surface states, band structure, electron density of states)