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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
Utsunomiya, Toru  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-0023-7812 (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.
URI: http://hdl.handle.net/2433/198886
DOI(Published Version): 10.1063/1.4916813
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