Temperature dependent electrical transport of disordered reduced graphene oxide

Baleeswaraiah Muchharla, T. N. Narayanan, Kaushik Balakrishnan, Pulickel M. Ajayan, Saikat Talapatra

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

We report on the simple route for the synthesis of chemically reduced graphene oxide (rGO) using ascorbic acid (a green chemical) as a reducing agent. Temperature- dependent electrical transport properties of rGO thin films have been studied in a wide range (50 K < T < 400 K) of temperature. Electrical conduction in rGO thin films was displayed in two different temperature regimes. At higher temperatures, Arrhenius-like temperature dependence of resistance was observed indicating a band gap dominating transport behavior. At lower temperatures, the rGO sample showed a conduction mechanism consistent with Mott's two-dimensional variable range hopping (2D-VRH). An unsaturated negative magnetoresistance (MR) was observed up to 3 T field. A decrease in negative MR at high temperatures is attributed to the phonon scattering of charge carriers.

Original languageEnglish (US)
Article number011008
Journal2D Materials
Volume1
Issue number1
DOIs
StatePublished - Jun 1 2014
Externally publishedYes

Keywords

  • Carbon
  • Electrical transport
  • Graphene
  • rGO

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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