中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2389-2396.doi: 10.1088/1009-1963/15/10/034

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Local field distribution and configuration of CO molecules adsorbed on the nanostructure platinum surface

何素贞1, 吴晨旭1, 黄晓菁2   

  1. (1)Soft Condensed Matter Lab, Department of Physics, Xiamen University,Xiamen 361005, China; (2)Soft Condensed Matter Lab, Department of Physics, Xiamen University,Xiamen 361005, China Department of Physics, School of Science, Jimei University,Xiamen 361021, China
  • 收稿日期:2005-12-14 修回日期:2006-05-22 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10225420, 90206039 and 20021002).

Local field distribution and configuration of CO molecules adsorbed on the nanostructure platinum surface

Huang Xiao-Jing (黄晓菁)ab, He Su-Zhen (何素贞)a, Wu Chen-Xu (吴晨旭)a   

  1. a Soft Condensed Matter Lab, Department of Physics, Xiamen University, Xiamen 361005, China; b Department of Physics, School of Science, Jimei University, Xiamen 361021, China
  • Received:2005-12-14 Revised:2006-05-22 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10225420, 90206039 and 20021002).

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摘要： This paper shows that the local electric field distribution near the nanostructure metallic surface is obtained by solving the Laplace equation, and furthermore, the configuration of CO molecules adsorbed on a Pt nanoparticle surface is obtained by using Monte Carlo simulation. It is found that the uneven local electric field distribution induced by the nanostructure surface can influence the configuration of carbon monoxide (CO) molecules by a force, which drags the adsorbates to the poles of the nanoparticles. This result, together with our results obtained before, may explain the experimental results that the nanostructure metallic surface can lead to abnormal phenomena such as anti-absorption infrared effects.

关键词: local electric field, adsorbed molecules, nanostructure metal surface

Abstract: This paper shows that the local electric field distribution near the nanostructure metallic surface is obtained by solving the Laplace equation, and furthermore, the configuration of CO molecules adsorbed on a Pt nanoparticle surface is obtained by using Monte Carlo simulation. It is found that the uneven local electric field distribution induced by the nanostructure surface can influence the configuration of carbon monoxide (CO) molecules by a force, which drags the adsorbates to the poles of the nanoparticles. This result, together with our results obtained before, may explain the experimental results that the nanostructure metallic surface can lead to abnormal phenomena such as anti-absorption infrared effects.

Key words: local electric field, adsorbed molecules, nanostructure metal surface

中图分类号:  (Adsorbate structure (binding sites, geometry))

  • 68.43.Fg
68.43.Mn (Adsorption kinetics ?) 68.47.De (Metallic surfaces) 78.30.Er (Solid metals and alloys ?) 81.16.Rf (Micro- and nanoscale pattern formation)