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      Controlling the photoconductivity: graphene oxide and polyaniline self assembled intercalation

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      Author(s)
      Vempati S.
      Ozcan, S.
      Uyar, Tamer
      Date
      2015
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      American Institute of Physics Inc.
      Volume
      106
      Issue
      5
      Pages
      051106-1 - 051106-4
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We report on controlling the optoelectronic properties of self-assembled intercalating compound of graphene oxide (GO) and HCl doped polyaniline (PANI). Optical emission and X-ray diffraction studies revealed a secondary doping phenomenon of PANI with -OH and -COOH groups of GO, which essentially arbitrate the intercalation. A control on the polarity and the magnitude of the photoresponse (PR) is harnessed by manipulating the weight ratios of PANI to GO (viz., 1:1.5 and 1:2.2 are abbreviated as PG1.5 and PG2.2, respectively), where ±PR = 100(RDark - RUV-Vis)/RDark and R corresponds to the resistance of the device in dark or UV-Vis illumination. To be precise, the PR from GO, PANI, PG1.5, and PG2.2 are +34%, -111%, -51%, and +58%, respectively.
      Keywords
      Doping (additives)
      Intercalation
      Polyaniline
      X ray diffraction
      Doped polyaniline
      Graphene oxides
      Optical emissions
      Optoelectronic properties
      Photoresponses
      Self-assembled
      Weight ratios
      X-ray diffraction studies
      Graphene
      Permalink
      http://hdl.handle.net/11693/22536
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.4907260
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
      • Nanotechnology Research Center (NANOTAM) 1125
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