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

• Semiconductor Opto-electronics • Previous Articles     Next Articles

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

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

CLC Number: 

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