中国物理B ›› 2015, Vol. 24 ›› Issue (6): 66102-066102.doi: 10.1088/1674-1056/24/6/066102

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

Low-temperature phase transformation from nanotube to sp3 superhard carbon phase

徐宁a, 李建福b, 黄勃龙b, 王保林a   

  1. a Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China;
    b Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR
  • 收稿日期:2014-11-11 修回日期:2015-01-14 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174242, 11204265, 11404278, 11147007, and 11274151), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2012248), and the Scientific Research Foundation of Yancheng Institute of Technology, China (Grant No. KJC2014024).

Low-temperature phase transformation from nanotube to sp3 superhard carbon phase

Xu Ning (徐宁)a, Li Jian-Fu (李建福)b, Huang Bo-Long (黄勃龙)b, Wang Bao-Lin (王保林)a   

  1. a Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China;
    b Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR
  • Received:2014-11-11 Revised:2015-01-14 Online:2015-06-05 Published:2015-06-05
  • Contact: Xu Ning, Wang Bao-Lin E-mail:nxu@ycit.cn;wangbl@ycit.edu.cn
  • About author:61.66.Bi; 61.50.Ks; 62.50.-p; 78.30.Am
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174242, 11204265, 11404278, 11147007, and 11274151), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2012248), and the Scientific Research Foundation of Yancheng Institute of Technology, China (Grant No. KJC2014024).

摘要:

Numerous new carbon allotropes have been uncovered by compressing carbon nanotubes based on our computational investigation. The volume compression calculations suggest that these new phases have a very high anti-compressibility with a large bulk modulus (B0). The predicted B0 of new phases is larger than that of c-BN (373 GPa) and smaller than that of diamond (453 GPa). All of the predicted structures are superhard transparent materials with a larger band gap and possess the covalent characteristics with sp3-hybridized electronic states. The simulated results will help us better understand the structural phase transition of cold-compressed carbon nanotubes.

关键词: low-temperature phase transformation, superhard carbon phase

Abstract:

Numerous new carbon allotropes have been uncovered by compressing carbon nanotubes based on our computational investigation. The volume compression calculations suggest that these new phases have a very high anti-compressibility with a large bulk modulus (B0). The predicted B0 of new phases is larger than that of c-BN (373 GPa) and smaller than that of diamond (453 GPa). All of the predicted structures are superhard transparent materials with a larger band gap and possess the covalent characteristics with sp3-hybridized electronic states. The simulated results will help us better understand the structural phase transition of cold-compressed carbon nanotubes.

Key words: low-temperature phase transformation, superhard carbon phase

中图分类号:  (Elemental solids)

  • 61.66.Bi
61.50.Ks (Crystallographic aspects of phase transformations; pressure effects) 62.50.-p (High-pressure effects in solids and liquids) 78.30.Am (Elemental semiconductors and insulators)