Tip effects in the scanning-tunneling microscopy of semiconductor electrodes

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• 作者：Hiesgen ; R. ; Meissner ; D. ; Schmickler ; W.
• 关键词：Electrochemical methods ; Scanning tunneling microscopy ; Solid&ndash ; liquid interfaces ; Semiconductor&ndash ; electrolyte interfaces ; Semi-empirical models and model calculations
• 刊名：Surface Science
• 出版年：2001
• 出版时间：May 20, 2001
• 年：2001
• 卷：479
• 期：1-3
• 页码：183-190
• 全文大小：150 K

文摘

The surface properties of a WSe₂ electrode have been investigated with a scanning-tunneling microscope in an electrochemical cell. Current–potential curves have been obtained for various electrode potentials and tunneling distances. They show a strong influence of the tip on the local electrode potential. The main features can be understood within a simple model describing the distribution of the electrostatic potential and its effect on the local electronic density.