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
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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.
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