Chemical Imaging of Surfaces with the Scanning Electrochemical Microscope

Scanning electrochemical microscopy is a scanning probe technique that is based on faradaic current changes as a small electrode is moved across the surface of a sample. The images obtained depend on the sample topography and surface reactivity. The response of the scanning electrochemical microscop...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1991-10, Vol.254 (5028), p.68-74
Main Authors: Bard, Allen J., Fan, Fu-Ren F., Pierce, David T., Unwin, Patrick R., Wipf, David O., Zhou, Feimeng
Format: Article
Language:English
Subjects:
Adsorption
Bards
Chemical microscopy
Desorption
Electric current
Electrodes
Enzymes
Imaging
Innovations
Microscopes
Optical scanners
Positive feedback
Scanners
Scanning devices
Steady state current
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Summary:Scanning electrochemical microscopy is a scanning probe technique that is based on faradaic current changes as a small electrode is moved across the surface of a sample. The images obtained depend on the sample topography and surface reactivity. The response of the scanning electrochemical microscope is sensitive to the presence of conducting and electroactive species, which makes it useful for imaging heterogeneous surfaces. The principles and instrumentation used to obtain images and surface reaction-kinetic information are discussed, and examples of applications to the study of electrodes, minerals, and biological samples are given.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.254.5028.68