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American Chemical Society, Analytical Chemistry, 12(83), p. 4887-4893, 2011

DOI: 10.1021/ac2006075

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Simple and Clear Evidence for Positive Feedback Limitation by Bipolar Behavior during Scanning Electrochemical Microscopy of Unbiased Conductors

Journal article published in 2011 by Alexander I. Oleinick, Dario Battistel, Salvatore Daniele, Irina Svir ORCID, Christian Amatore ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

On the basis of an experimentally validated simple theoretical model, it is demonstrated unambiguously that when an unbiased conductor is probed by a scanning electrochemical tip (scanning electrochemical microscopy, SECM), it performs as a bipolar electrode. Though already envisioned in most recent SECM theories, this phenomenon is generally overlooked in SECM experimental investigations. However, as is shown here, this may alter significantly positive feedback measurements when the probed conductor is not much larger than the tip.