ABSTRACT
Contents 5.1 Introduction................................................................................................. 108 5.2 High-Field Electronic Transport in Graphene ....................................... 113
5.2.1 Practical Device Operation and High-Field Transport ........... 113 5.2.2 High-Field Transport in Graphene ............................................. 115
5.3 ermal Transport in Graphene .............................................................. 122 5.3.1 Intrinsic ermal Conductivity of Graphene ........................... 122 5.3.2 Extrinsic ermal Conductivity of Graphene ........................... 124
5.3.2.1 Isotope Eects ................................................................ 124 5.3.2.2 Structural Defect Eects .............................................. 125 5.3.2.3 Substrate Eects in Supported Graphene .................. 126 5.3.2.4 Size Eects and Boundary Scattering ........................ 126 5.3.2.5 Interlayer Eects in Few-Layer Graphene.................. 128 5.3.2.6 Cross-Plane ermal Conduction .............................. 129
References ............................................................................................................... 131
5.1 Introduction e rise of interest in two-dimensional (2D) materials started with graphene (Geim and Novoselov, 2007), a one-atomic layer of carbon atoms arranged into a honeycomb lattice with an interatomic distance of 1.42 Å, as shown in Figure 5.1. Carbon atoms in graphene are bonded through orbitals with sp2 hybridisation, which leads to a strong bond and excellent mechanical strength. A single atomic layer (monolayer) of graphene is nearly 98% transparent to visible light, enabling the design of graphene-based transparent electrodes (Kim et al., 2009a). Graphene is exible and shows great electrical characteristics under mechanical strain, which also enables the design of exible electronic applications (Lee et al., 2008). In addition to outstanding mechanical, electrical and thermal properties, which we will cover later, graphene-based technology benets from the abundance, nontoxicity and biocompatibility of carbon.
