Imaging Concentration Profiles of Redox‐Active Species with Nanometric Amperometric Probes: Effect of Natural Convection on Transport at Microdisk Electrodes | Zendy

Baltes Norman | Zendy; Thouin Laurent | Zendy; Amatore Christian | Zendy; Heinze Jürgen | Zendy

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Imaging Concentration Profiles of Redox‐Active Species with Nanometric Amperometric Probes: Effect of Natural Convection on Transport at Microdisk Electrodes

Author(s) -

Baltes Norman,

Thouin Laurent,

Amatore Christian,

Heinze Jürgen

Publication year - 2004

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200352662

Subject(s) - microelectrode , amperometry , diffusion , electrode , natural convection , redox , convection , materials science , analytical chemistry (journal) , diffusion layer , resolution (logic) , chemistry , chemical physics , electrochemistry , inorganic chemistry , chromatography , thermodynamics , physics , artificial intelligence , computer science

Nanoprobes for diffusion measurements : Nanometric‐sized electrodes ( r =80 nm) have been constructed to map concentration profiles within the diffusion layer of a larger microelectrode ( r =40 μm) at high resolution (see picture). Comparisons with theoretical predictions demonstrate that, contrary to common wisdom, natural convection in the solution does, to some extent, affect diffusion at microelectrodes.

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