Extraordinary suppression of carrier scattering in large area graphene oxide films

Journal Article · Mon Dec 22 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905087· OSTI ID:22395592

Kobayashi, Y. ^[1]

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1. Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)

In this study, we find that thermal treatment in ethanol vapor has a remarkable suppression effect of carrier scattering occurring between reduced graphene oxide (rGO) flakes in large area films. We observe excellent electrical properties such as high carrier mobility (∼5 cm{sup 2}/Vs) and low sheet resistance (∼40 KΩ/□) for the rGO films. From the electrical conductivity analysis of large area rGO films using two-dimensional variable range hopping model and structural analysis using Raman spectra measured from the rGO films, we reveal that the significant effect is caused by the expansion of conjugated π-electron system in rGO flake due to the efficient restoration of graphitic structure.

• OSTI ID: 22395592
• Journal Information: Applied Physics Letters, Vol. 105, Issue 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARRIER MOBILITY
CHARGE CARRIERS
ELECTRIC CONDUCTIVITY
ELECTRONS
ETHANOL
FILMS
GRAPHENE
GRAPHITE
HEAT TREATMENTS
RAMAN SPECTRA
SCATTERING
TWO-DIMENSIONAL SYSTEMS
VAPORS