Local charge transport properties of hydrazine reduced monolayer graphene oxide sheets prepared under pressure condition

Sou Ryuzaki*, Jakob Abild Stengaard Meyer, Søren Vermehren Petersen, Kasper Nørgaard, Tue Hassenkam, Bo Wegge Laursen

*Corresponding author for this work

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Abstract

Charge transport properties of chemically reduced graphene oxide (RGO) sheets prepared by treatment with hydrazine were examined using conductive atomic force microscopy. The current-voltage (I-V) characteristics of monolayer RGO sheets prepared under atmospheric pressure followed an exponentially increase due to 2D variable-range hopping conduction through small graphene domains in an RGO sheet containing defect regions of residual sp3carbon clusters bonded to oxygen groups, whereas RGO sheets prepared in a closed container under moderate pressure showed linear I-V characteristics with a conductivity of 267.2-537.5S/m. It was found that the chemical reduction under pressure results in larger graphene domains (sp2networks) in the RGO sheets when compared to that prepared under atmospheric pressure, indicating that the present reduction of GO sheets under the pressure is one of the effective methods to make well-reduced GO sheets.

Original languageEnglish
Article number093109
JournalApplied Physics Letters
Volume105
ISSN0003-6951
DOIs
Publication statusPublished - 2014

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