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

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

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.

OriginalsprogEngelsk
Artikelnummer093109
TidsskriftApplied Physics Letters
Vol/bind105
ISSN0003-6951
DOI
StatusUdgivet - 2014

ID: 130944316