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Title: Vacuum-ultraviolet photoreduction of graphene oxide: Electrical conductivity of entirely reduced single sheets and reduced micro line patterns
Authors: Tu, Yudi
Ichii, Takashi  kyouindb  KAKEN_id  orcid (unconfirmed)
Utsunomiya, Toru  kyouindb  KAKEN_id  orcid (unconfirmed)
Sugimura, Hiroyuki  kyouindb  KAKEN_id
Author's alias: 杉村, 博之
Issue Date: 1-Apr-2015
Publisher: AIP Publishing
Journal title: Applied Physics Letters
Volume: 106
Issue: 13
Thesis number: 133105
Abstract: We here report a scanning probe method to locally and directly research the electrical properties of vacuum-ultraviolet (VUV) reduced graphene oxide. The measured electrical conductivity of individual VUV-reduced GO (VUV-rGO) sheets by using conductive atomic force microscopy (CAFM) reached 0.20 S·m[−1] after 64 min irradiation, which was clearly enhanced compared with the pristine GO. According to the X-ray photoelectron spectroscopy results, the recovered conductivity of VUV-rGO could be ascribed to the partial elimination of oxygen-containing functional groups and the rapid reconstruction of the C=C bonds. Heterogeneously distributed low- and high-conductivity domains (with a diameter of tens of nanometer to ca. 500 nm) were found from current mapping of the VUV-rGO sheet. By applying photomask lithography, rGO regions were drawn into single GO sheet and were researched by CAFM. The in-plane lateral conductivity of rGO regions increased obviously compared with pristine GO regions.
Rights: © 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
DOI(Published Version): 10.1063/1.4916813
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