计算物理 ›› 2014, Vol. 31 ›› Issue (2): 247-252.

• 论文 • 上一篇    

C36团簇生长动力学及自由能

高娟, 圣宗强, 孟影, 付志粉   

  1. 安徽理工大学理学院, 安徽 淮南 232001
  • 收稿日期:2013-05-12 修回日期:2013-07-31 出版日期:2014-03-25 发布日期:2014-03-25
  • 作者简介:高娟(1980-),女。安徽淮北,讲师,硕士,从事计算材料科学研究,E-mail:gaojuanphys@163.com
  • 基金资助:
    国家自然基金(11247001);安徽省优秀青年人才基金(2010SQRL053);安徽省教育厅自然科学基金(KJ2012A083,J2013Z066)资助项目

Growth Dynamics and Free Energy of C36 Cluster

GAO Juan, SHENG Zongqiang, MENG Ying, FU Zhifen   

  1. School of Science, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2013-05-12 Revised:2013-07-31 Online:2014-03-25 Published:2014-03-25

摘要: 在2300 K的气相条件下,采用经典分子动力学方法对C36团簇的生长过程进行模拟,并计算生长过程中出现的势能最低的20个异构体的相对概率.计算结果表明:团簇系统在100 ns左右达到动态平衡,出现概率最大的异构体是2d而不是势能最低的D6h.对于某些势能和自由能均较高的碗状异构体,在生长过程中以一定概率出现,其出现概率甚至高于某些经典构型.

关键词: 团簇, C36, 分子动力学, 自由能

Abstract: Molecular dynamical simulations of C36 are performed under gaseous growth conditions at about 2 300 K. Probabilities of 20 lowest energy isomers in resultant clusters are calculated. It shows that C36 system reaches a kinetic equilibrium within about 100 nanoseconds and the most probable isomer is a D2d cage rather than a D6h cage,though the later has the lowest potential. Several bowl isomers with higher potential energy and free energy appear with comparable probabilities rather than classical isomers.

Key words: cluster, C36, molecular dynamic, free energy

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