ELECTRICAL AND STRUCTURAL CHARACTERIZATION OF FEW-LAYER GRAPHENE SHEETS ON QUARTZ
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Date
2022
Authors
Aimaganbetov, Kazybek
Almas, Nurlan
Kurbanova, Bayan
Muratov, Dauren
Serikkanov, Abay
Insepov, Zinetula
Tokmoldin, Nurlan
Journal Title
Journal ISSN
Volume Title
Publisher
Materials
Abstract
Despite the impressive performance and incredible promise for a variety of applications,
the wide-scale commercialization of graphene is still behind its full potential. One of the main
challenges is related to preserving graphene’s unique properties upon transfer onto practically
desirable substrates. In this work, few-layer graphene sheets deposited via liquid-phase transfer from
copper onto a quartz substrate have been studied using a suite of experimental techniques, including
scanning electron microscopy (SEM), Raman spectroscopy, admittance spectroscopy, and four-point
probe electrical measurements. SEM measurements suggest that the transfer of graphene from copper
foil to quartz using the aqueous solution of ammonium persulfate was accompanied by unintentional
etching of the entire surface of the quartz substrate and, as a result, the formation of microscopic
facet structures covering the etched surface of the substrate. As revealed by Raman spectroscopy
and the electrical measurements, the transfer process involving the etching of the copper foil in a
0.1Msolution of (NH4)2S2O8 resulted in its p-type doping. This was accompanied by the appearance
of an electronic gap of 0.022 eV, as evidenced by the Arrhenius analysis. The observed increase in
the conductance of the samples with temperature can be explained by thermally activated carrier
transport, dominating the scattering processes.
Description
Keywords
Type of access: Open Access, few-layer graphene, Raman spectroscopy, Hall effect, admittance, scanning electron microscopy
Citation
Aimaganbetov, K., Almas, N., Kurbanova, B. A., Muratov, D., Serikkanov, A. S., Insepov, Z., & Tokmoldin, N. (2022). Electrical and Structural Characterization of Few-Layer Graphene Sheets on Quartz. Materials, 15(15), 5330. https://doi.org/10.3390/ma15155330