J4 ›› 2012, Vol. 29 ›› Issue (2): 236-241.

• 半导体光电 • 上一篇    下一篇

介质表面颗粒膜介电常数分析

葛泽玲1,3, 郑勇林1,2   

  1. 1 长江师范学院物理学与电子工程学院, 重庆 408100;
    2 成都大学电子信息工程学院, 四川 成都  610106;
    3 重庆大学电气工程学院, 重庆 401331
  • 收稿日期:2011-03-17 修回日期:2011-12-29 出版日期:2012-03-28 发布日期:2012-02-28
  • 通讯作者: 葛泽玲(1975—),女,四川富顺人,硕士,研究方向为近代物理实验、凝聚态表面复合材料。 E-mail:gezeling@yeah.net
  • 基金资助:

    重庆长江师范学院科研项目(077kg41)

Analysis of dielectric constant on a material surface for granular film

GE Ze-ling1,3, ZHENG Yong-lin1,2   

  1. 1 School of Physics and Electron Engineering, Yangtze Normal University, Chongqing 408100, China;
    2 Institute of Electronics and Information Engineering,Chengdu University,Chengdu 610106, China;
    3 College of Electronical Engineering, Chongqing University, Chongqing 401331, China
  • Received:2011-03-17 Revised:2011-12-29 Published:2012-03-28 Online:2012-02-28

摘要:

假设材料表面极性棒状分子为取向分布,采用取向序参数,考虑局域场对有极分子、固有偶极矩的作用及基底材料表面和分子之间相互作用能,计算了材料表面颗粒膜的介电常数。计算结果表明:颗粒膜的介电常数依赖于基底材料相对介电常数和棒状分子之间的距离;其次还发现在分子面积和分子临界面积接近的范围内,分子和材料表面之间的相互作用能使之成为单一的贡献。反之,分子面积与分子临界面积相差较大时,局域场的相互作用是主要的贡献。

关键词: 光电子学, 电介质, 颗粒膜介质, 介电常数, 相互作用能

Abstract:

On the hypothesis that polar rod-like molecule is orientation distribution ,it is calculated that dielectric constant of granular film on material surface by using orientation order parameters and considering the effect of local field on polar molecules with permanent dipole moment and interaction energy between molecules and material surface. The results shows that dielectric constant of granular film depends on relative dielectric constant of substrate material and distance between molecules.It is aslo found that interaction energy between molecules and material surface is the only influencing factor if molecule area is close to critical area. However, interaction of local fields becomes a major influencing factor if molecular area is more different to critical area.

Key words: optoelectronics, dielectric, metal particle composite media, dielectric constant, interaction energy

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