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Electrochemical Collisions of Individual Graphene Oxide Sheets: An Analytical and Fundamental Study
Author(s) -
Renault Christophe,
Lemay Serge G.
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901606
Subject(s) - graphene , oxide , collision , materials science , suspension (topology) , electrolyte , electrochemistry , chemical physics , aqueous suspension , aqueous solution , nanotechnology , computer science , electrode , chemistry , mathematics , metallurgy , computer security , homotopy , pure mathematics
We propose an analytical method based on electrochemical collisions to detect individual graphene oxide (GO) sheets in an aqueous suspension. The collision rate is found to exhibit a complex dependence on redox mediator and supporting electrolyte concentrations. The analysis of multiple collision events in conjunction with numerical simulations allows quantitative information to be extracted, such as the molar concentration of GO sheets in suspension and an estimate of the size of individual sheets. We also evidence by numerical simulation the existence of edge effects on a 2D blocking object.