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Reversible Tuning of the Electronic Properties of Graphene via Controlled Exposure to Electron Beam Irradiation and Annealing

Published online by Cambridge University Press:  30 August 2011

Desalegne Teweldebrhan ,
Guanxiong Liu  and
Alexander A. Balandin
Desalegne Teweldebrhan
Affiliation:
Nano-Device Laboratory, Bourne College of Engineering, University of California – Riverside, Riverside, CA 92521 U.S.A. Material Science and Engineering Program, University of California – Riverside, Riverside, CA 92521 U.S.A.
Guanxiong Liu
Affiliation:
Nano-Device Laboratory, Bourne College of Engineering, University of California – Riverside, Riverside, CA 92521 U.S.A.
Alexander A. Balandin
Affiliation:
Nano-Device Laboratory, Bourne College of Engineering, University of California – Riverside, Riverside, CA 92521 U.S.A. Material Science and Engineering Program, University of California – Riverside, Riverside, CA 92521 U.S.A.
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Abstract

Graphene reveals many extraordinary properties including extremely high room temperature carrier mobility and intrinsic thermal conductivity. Understanding how to controllably modify graphene’s properties is essential for its proposed applications. Here we report on a method for tuning the electrical properties of graphene via electron beam irradiation. It was observed that single-layer graphene is highly susceptible to the low-energy electron beams. We demonstrated that by controlling the irradiation dose one can change, by desired amount, the carrier mobility, shift the charge neutrality point, increase the resistance at the minimum conduction point, induce the “transport gap” and achieve current saturation in graphene. The change in graphene properties is due to defect formation on the graphene surface and in the graphene lattice. The changes are reversible by annealing until some critical irradiation dose is reached.

Keywords

radiation effectselectrical propertiesthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1344: Symposium Y – Functional Two-Dimensional Layered Materials—From Graphene to Topological Insulators , 2011 , mrss11-1344-y04-04
Copyright
Copyright © Materials Research Society 2011

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