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

TY - JOUR

T1 - Local charge transport properties of hydrazine reduced monolayer graphene oxide sheets prepared under pressure condition

AU - Ryuzaki, Sou

AU - Meyer, Jakob Abild Stengaard

AU - Petersen, Søren Vermehren

AU - Nørgaard, Kasper

AU - Hassenkam, Tue

AU - Laursen, Bo Wegge

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

U2 - 10.1063/1.4895072

DO - 10.1063/1.4895072

M3 - Journal article

AN - SCOPUS:84907007256

SN - 0003-6951

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 093109

ER -