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Citation: Shi Cai-Hui, Cai Xiong-Wei, Chen Yan-Xia, Tian Zhong-Qun, Mao Bing-Wei. Extending Atomic-resolution Electrochemicl Scanning Tunneling Microscopy Studies to Polycrystalline Electrode Surfaces[J]. Acta Physico-Chimica Sinica, ;1997, 13(12): 1061-1064. doi: 10.3866/PKU.WHXB19971202 shu

Extending Atomic-resolution Electrochemicl Scanning Tunneling Microscopy Studies to Polycrystalline Electrode Surfaces

1.
State Key Laboratory for Physical Chemistry of Solid Surfaces,Institute of Physical Chemistry，Department of Chemistry,Ximen University,Xiamen 361005

Received Date: 28 July 1997
Available Online: 15 December 1997

Electrochemical Scanning Tunneling Microscopy (ECSTM) has been extended to characterizc polycrystalline silver electrode surfaces in iodide solution. Potential-dependent ordered and disordered structures of the silver electrode as well as the iodine adsorption layer have been observed to coexist on polycrystalline silver electrode surfaces, for the first time. A very special column arrangement of the iodine adsorption layer, similar to the so called "missing row" type of structure has been observed. Some columns of the iodine adsorption layer roll over from one place to another along with the time and changing potential. A proposed model has been given to better describe the structure. The highly corrugated and loose surface structure of the polycrystalline surface are responsible for this special phenomenon.
- Electrochemical scanning tunneling microscopy,
- Atomic resolution,
- Silver electrode,
- Iodine adsorption
  ,
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