计算物理 ›› 2011, Vol. 28 ›› Issue (4): 605-610.

• 研究论文 • 上一篇    下一篇

分子间相互作用对硫醇分子膜电输运性质的影响

李英德1,2, 李宗良1, 王传奎1   

  1. 1. 山东师范大学物理与电子科学学院, 山东 济南 250014;
    2. 潍坊学院 物理与电子科学学院, 山东 潍坊 261061
  • 收稿日期:2010-08-30 修回日期:2011-01-18 出版日期:2011-07-25 发布日期:2011-07-25
  • 作者简介:李英德(1971-),男,山东寿光,副教授,博士生,主要从事分子电子学研究所,E-mail:wfulyd@sohu.com
  • 基金资助:
    国家自然科学基金(10804064);山东省自然科学基金(ZR2010AL024)资助项目

Electronic Transport Properties of Alkanemonothiol Molecular Membranes:Molecular Interactions

LI Yingde1,2, LI Zongliang1, WANG Chuankui1   

  1. 1. College of Physics and Electronic Science, Shandong Normal University, Jinan 250014, China;
    2. College of Physics and Electronic Science, Weifang University, Weifang 261061, China
  • Received:2010-08-30 Revised:2011-01-18 Online:2011-07-25 Published:2011-07-25

摘要: 利用密度泛函理论和弹性散射格林函数方法,对硫醇分子膜的电学特性进行模拟.计算结果表明,由于分子间的相互作用,导致分子膜的导电能力比单分子提高2~3个数量级.分子结的导电能力随着压力增加而增加,电极距离的变化使分子与电极以及分子间的耦合增强、分子结的链内隧穿和链间隧穿几率增大,导致电流增加.

关键词: 压力, 烷烃硫醇分子, 电输运性质, 分子电子学

Abstract: With density functional theory(DFT) and elastic scattering Green's function method,electronic transport of alkanemonothiol molecular membranes were simulated theoretically.It shows that conductive ability of molecular membranes increased 2 to 3 orders of magnitude than that of a single molecule due to interaction between molecules.Conductive ability of a molecular junction increases with increasing external force.Increase of current is mainly due to increased probability of tunneling within and between chains in a molecular junction.The increased probability is caused by coupling enhancement between molecule and electrode and between molecules.

Key words: external force, alkanemonothiol molecule, electronic transport properties, molecular electronics

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