title: Simple and clear evidence for positive feedback limitation by bipolar behavior during scanning electrochemical microscopy of unbiased conductors.
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.
authors: Département de Chimie, UMR 8640, Ecole Normale Supérieure, 24 Rue Lhomond, F-75231 Paris Cedex 5, France.
authors: Alexander I
authors: AI
authors: Oleinick
authors: Dario
authors: D
authors: Battistel
authors: Salvatore
authors: S
authors: Daniele
authors: Irina
authors: I
authors: Svir
authors: Christian
authors: C
authors: Amatore