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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Measuring quantum conductance and capacitance of graphene using impedance-derived capacitance spectroscopy

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Author(s):
Lopes, Lais C. [1] ; Santos, Adriano [1] ; Bueno, Paulo R. [1]
Total Authors: 3
Affiliation:
[1] Sao Paulo State Univ UNESP, Inst Chem, BR-14800060 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Carbon; v. 184, p. 821-827, OCT 30 2021.
Web of Science Citations: 0
Abstract

Here, we demonstrate that impedance-derived capacitance spectroscopy is a useful method for measuring and analyzing the quantum of conductance and capacitance of a single-layer graphene sheet. Both quantum conductance and capacitance exhibit the expected traditional V-shape when measured as a function of bias potential (with the minima of both parameters being at the Dirac point) in a 1-Butyl-3methylimidazolium tetrafluoroborate ionic liquid environment. Measurements were conducted at a specific low-frequency limit in which the conductance and capacitance were scanned as a function of bias potential to attain the quantum conductive and capacitive V-shapes. The V-shapes agree in terms of magnitude and profile with those reported in the literature using different methodologies and/or techniques. This validates impedance-derived capacitance spectroscopy as a suitable method to acquire key information of graphene and its derivatives. This method represents an alternative for rapid construction of both conductive and capacitive V-shapes of graphene in a single, simple experimental run. (c) 2021 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 18/23577-5 - Nanoelectronics and Nanoscale Electrochemistry: Fundaments and Applications.
Grantee:Lais Cristine Lopes
Support Opportunities: Scholarships in Brazil - Post-Doctoral