Atomic Force Microscope Based Kelvin Probe Measurements: Application to an Electrochemical Reaction
Author(s) -
M. Böhmisch,
Frank Burmeister,
A. Rettenberger,
Jörg Zimmermann,
Johannes Boneberg,
P. Leiderer
Publication year - 1997
Publication title -
the journal of physical chemistry b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 392
eISSN - 1520-6106
pISSN - 1520-5207
DOI - 10.1021/jp9728767
Subject(s) - kelvin probe force microscope , materials science , atomic force microscopy , work (physics) , nanostructure , semiconductor , microscope , conductive atomic force microscopy , volta potential , work function , etching (microfabrication) , electrochemistry , nanotechnology , analytical chemistry (journal) , optoelectronics , chemistry , electrode , optics , physics , thermodynamics , layer (electronics) , chromatography
An atomic force microscope (AFM) was utilized as a Kelvin probe to determine work functions of several metals and semiconductors quantitatively. Most of the experimental data show excellent agreement with published values measured by photoemission. Variations in work functions as low as 5 mV could be detected with a typical lateral resolution of 20 nm. This method allowed us to analyze and explain the energetics of an electrochemical reaction on the surface of WSe2, which could be in situ induced and controlled by an externally applied voltage between AFM tip and sample. Thus it could be exploited for etching nanostructures.
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