Thin film versus paper-like reduced graphene oxide: Comparative study of structural, electrical, and thermoelectrical properties
authors Okhay, O; Goncalves, G; Tkach, A; Dias, C; Ventura, J; da Silva, MFR; Goncalves, LMV; Titus, E
nationality International
journal JOURNAL OF APPLIED PHYSICS
keywords CHEMICAL-REDUCTION; NANOCOMPOSITES; NANOSHEETS; GRAPHITE
abstract We report fabrication of reduced graphene oxide (rGO) films using chemical reduction by hydrazine hydrate and rGO paper-like samples using low temperature treatment reduction. Structural analysis confirms the formation of the rGO structure for both samples. Current-voltage (I-V) measurements of the rGO film reveal semiconductor behavior with the maximum current value of similar to 3 x 10(-4) A. The current for the rGO paper sample is found to be, at least, one order of magnitude higher. Moreover, bipolar resistance switching, corresponding to memristive behavior of type II, is observed in the I-V data of the rGO paper. Although precise values of the rGO film conductivity and the Seebeck coefficient could not be measured, rGO paper shows an electrical conductivity of 6.7 x 10(2)S/m and Seebeck coefficient of -6 mu V/degrees C. Thus, we demonstrate a simplified way for the fabrication of rGO paper that possesses better and easier measurable macroscopic electrical properties than that of rGO thin film. Published by AIP Publishing.
publisher AMER INST PHYSICS
issn 0021-8979
year published 2016
volume 120
issue 5
digital object identifier (doi) 10.1063/1.4958956
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000383091600007
  ciceco authors
  impact metrics
times cited (wos core): 1
journal impact factor (jcr 2016): 2.068
5 year journal impact factor (jcr 2016): 2.103
category normalized journal impact factor percentile (jcr 2016): 60.204
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