Chem. J. Chinese Universities

• 研究论文 • Previous Articles     Next Articles

Improved Tight-binding Monte Carlo Method and Its Application in Carbon Nanopeapod

LIN Yi1, CAI Wen-Sheng1,2*, SHAO Xue-Guang2   

    1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;
    2. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2006-08-15 Revised:1900-01-01 Online:2007-09-10 Published:2007-09-10
  • Contact: CAI Wen-Sheng

Abstract: An improved tight-binding Monte Carlo method is proposed, by which the CPU time can be greatly decreased through reducing the number of atoms in calculating the tight-binding energy. The simulation of the parallel nanotube junction indicates that the improved method is much more efficient than the previous one. This method is successfully applied in study of the large carbon nanopeapod. The calculation results show that, the fullerene coalescence occurs inside the single-walled carbon nanotube at about 2000 K with the formation of vacancies on the close sides of fullerenes, or the fullerene coalescence is only observed at a high temperature of about 4500 K. The orientation of fullerenes does not influence the coalescence.

Key words: Tight-binding potential, Monte Carlo simulation, Carbon nanotube, Carbon nanopeapod, Coalescence

CLC Number: 

TrendMD: