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Mechanisms of doping graphene

Lookup NU author(s): Dr Jon Goss, Professor Patrick Briddon

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Abstract

We distinguish three mechanisms of doping graphene. Density functional theory is used to show that electronegative molecules like tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) and electropositive metals like K dope graphene p- and n-type, respectively. These dopants are expected to lead to a decrease in carrier mobility arising from Coulomb scattering but without any hysteresis effects. Secondly, a novel doping mechanism is exhibited by Au which dopes bilayer graphene but not single layer. Thirdly, electrochemical doping is effected by redox reactions and can result in p-doping by humid atmospheres and n-doping by NH3 and toluene. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


Publication metadata

Author(s): Pinto H, Jones R, Goss JP, Briddon PR

Publication type: Article

Publication status: Published

Journal: Physica Status Solidi. A: Applications and Materials Science

Year: 2010

Volume: 207

Issue: 9

Pages: 2131-2136

Print publication date: 24/08/2010

ISSN (print): 1862-6300

ISSN (electronic): 1862-6319

Publisher: Wiley - VCH Verlag GmbH & Co. KGaA

URL: http://dx.doi.org/10.1002/pssa.201000009

DOI: 10.1002/pssa.201000009


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