Electrical and thermal conductivity of low temperature CVD graphene: the effect of disorder
- 25 May 2011
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 22 (27), 275716
- https://doi.org/10.1088/0957-4484/22/27/275716
Abstract
In this paper we present a study of graphene produced by chemical vapor deposition (CVD) under different conditions with the main emphasis on correlating the thermal and electrical properties with the degree of disorder. Graphene grown by CVD on Cu and Ni catalysts demonstrates the increasing extent of disorder at low deposition temperatures as revealed by the Raman peak ratio, IG/ID. We relate this ratio to the characteristic domain size, La, and investigate the electrical and thermal conductivity of graphene as a function of La. The electrical resistivity, ρ, measured on graphene samples transferred onto SiO2/Si substrates shows linear correlation with La(-1). The thermal conductivity, K, measured on the same graphene samples suspended on silicon pillars, on the other hand, appears to have a much weaker dependence on La, close to K∼La1/3. It results in an apparent ρ∼K3 correlation between them. Despite the progressively increasing structural disorder in graphene grown at lower temperatures, it shows remarkably high thermal conductivity (10(2)-10(3) W K(-1) m(-1)) and low electrical (10(3)-3×10(5) Ω) resistivities suitable for various applications.This publication has 50 references indexed in Scilit:
- Graphene: Electronic and Photonic Properties and DevicesNano Letters, 2010
- Graphene and Graphene Oxide: Synthesis, Properties, and ApplicationsAdvanced Materials, 2010
- Roll-to-roll production of 30-inch graphene films for transparent electrodesNature Nanotechnology, 2010
- Direct exfoliation of natural graphite into micrometre size few layers graphene sheets using ionic liquidsChemical Communications, 2010
- Wafer-Scale Synthesis and Transfer of Graphene FilmsNano Letters, 2010
- Transfer of Large-Area Graphene Films for High-Performance Transparent Conductive ElectrodesNano Letters, 2009
- Graphene: Status and ProspectsScience, 2009
- Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper FoilsScience, 2009
- The rise of grapheneNature Materials, 2007
- Electric Field Effect in Atomically Thin Carbon FilmsScience, 2004