Electrostatic forces between metallic tip and semiconductor surfaces
作者:
S. Hudlet,
M. Saint Jean,
B. Roulet,
J. Berger,
C. Guthmann,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 77,
issue 7
页码: 3308-3314
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.358616
出版商: AIP
数据来源: AIP
摘要:
Atomic force microscopy used in the resonant mode is a powerful tool for measuring local surface properties: for example, the quantitative analysis of the electrical forces induced by the application of an electric field between a conductive microscope tip and a surface allows the determination of the tip/surface capacitance and the local surface work function. However, these quantitative analyses require knowledge of tip geometry. In this article, we show that the simple procedure of evaluating the tip curvature radius by fitting the variations of the electrostatic force with the tip‐surface distance is not always adapted to the case where one of the tip‐surface system elements is a semiconductor. However, particular experimental conditions are determined to overcome these difficulties. ©1995 American Institute of Physics.
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