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Recessed Nanoelectrodes for Nanogap Voltammetry
Author(s) -
Bae Je Hyun,
Yu Yun,
Mirkin Michael V.
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600463
Subject(s) - cyclic voltammetry , voltammetry , substrate (aquarium) , etching (microfabrication) , materials science , electrochemistry , electrolyte , biasing , nanotechnology , supporting electrolyte , electrode , analytical chemistry (journal) , optoelectronics , layer (electronics) , voltage , chemistry , oceanography , physics , quantum mechanics , chromatography , geology
Exploration of electrochemical properties of nanoconfined species is an area of active interest. In this Communication, recessed Pt nanoelectrodes were prepared by controlled electrochemical etching and evaluated by combination of voltammetry and atomic force microscopy. The effects of ac frequency and ac voltage on the etching process are discussed. Voltammetry was carried out in the nanogap between the etched nanoelectrode and the planar substrate surface. Peak‐shaped steady‐state voltammograms were obtained with a low concentration of supporting electrolyte and fitted to the theory, pointing to the influence of the electrical double layer on transport of a charged redox species within the confined space.