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      Reversible electrical reduction and oxidation of graphene oxide

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      Author(s)
      Ekiz, O. O.
      Ürel, M.
      Güner, H.
      Mizrak, A. K.
      Dâna, A.
      Date
      2011
      Source Title
      Graphene
      Print ISSN
      1936-0851
      Publisher
      American Chemical Society
      Volume
      5
      Issue
      4
      Pages
      2475 - 2482
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We demonstrate that graphene oxide can be reversibly reduced and oxidized using electrical stimulus. Controlled reduction and oxidation in two-terminal devices containing multilayer graphene oxide films are shown to result in switching between partially reduced graphene oxide and graphene, a process which modifies the electronic and optical properties. High-resolution tunneling current and electrostatic force imaging reveal that graphene oxide islands are formed on multilayer graphene, turning graphene into a self-assembled heterostructure random nanomesh. Charge storage and resistive switching behavior is observed in two-terminal devices made of multilayer graphene oxide films, correlated with electrochromic effects. Tip-induced reduction and oxidation are also demonstrated. Results are discussed in terms of thermodynamics of oxidation and reduction reactions. © 2011 American Chemical Society.
      Keywords
      Graphene oxide
      Electrochemistry
      Electrochromism
      Electrostatic force microscopy
      Resistive switching
      Tip-induced oxidation
      Oxide films
      Permalink
      http://hdl.handle.net/11693/21953
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/nn1014215
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      • Institute of Materials Science and Nanotechnology (UNAM) 2098
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