Simultaneous topographical and amperometric imaging of surfaces in air and under solution
UNSPECIFIED (2000) Simultaneous topographical and amperometric imaging of surfaces in air and under solution. In: International Symposium on Localized In-Situ Methods for Investigating Electrochemical Interfaces, HONOLULU, HI, OCT 20-21, 1999. Published in: LOCALIZED IN-SITU METHODS FOR INVESTIGATING ELECTROCHEMICAL INTERFACES, 99 (28). pp. 147-165.Full text not available from this repository.
A combined scanning electrochemical microscope (SECM) - atomic force microscope (AFM) is described. This instrument permits the first simultaneous topographical and electrochemical measurements of substrates both in air and under aqueous solution, at high spatial resolution. For in-air measurements, the amperometric response of a Pt-coated AFM tip connected as a working electrode is monitored as the probe is scanned over the surface of interest. For work under fluid, probe tips have been constructed by coating flattened and etched Pt microwires with insulating, electrophoretically-deposited paint. The flattened portion of the probe provides a flexible cantilever (force sensor), while the coating insulates the probe such that only the tip end (electrode) is exposed to solution. In both cases, the SECM-AFM technique is illustrated with simultaneous topographical and electrochemical imaging studies of track-etched polycarbonate membranes. The possible use of the technique for targeting surface structural features for subsequent electrochemical-topographical investigations is highlighted with preliminary studies on the local etching of crystal surfaces.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QD Chemistry|
|Series Name:||ELECTROCHEMICAL SOCIETY SERIES|
|Journal or Publication Title:||LOCALIZED IN-SITU METHODS FOR INVESTIGATING ELECTROCHEMICAL INTERFACES|
|Publisher:||ELECTROCHEMICAL SOCIETY INC|
|Editor:||Taylor, SR and Hillier, AC and Seo, M|
|Number of Pages:||5|
|Page Range:||pp. 147-165|
|Title of Event:||International Symposium on Localized In-Situ Methods for Investigating Electrochemical Interfaces|
|Location of Event:||HONOLULU, HI|
|Date(s) of Event:||OCT 20-21, 1999|
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