Renault C, Lemay SG. Electrochemical Collisions of Individual Graphene Oxide Sheets: An Analytical and Fundamental Study.
ChemElectroChem 2020;
7:69-73. [PMID:
31998598 PMCID:
PMC6973065 DOI:
10.1002/celc.201901606]
[Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/25/2019] [Indexed: 11/12/2022]
Abstract
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.
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