Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials

Serhii Shafraniuk

• Publisher: Elsevier
• Year: 2017
• Print ISBN: 9780323443975
• eBook ISBN: 9780323444903
• Topic: Physical Sciences
• Subtopic: Physical & Theoretical Chemistry

Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials describes thermoelectric phenomena and thermal transport in graphene and other 2-dimentional nanomaterials and devices. Graphene, which is an example of an atomic monolayered material, has become the most important growth area in materials science research, stimulating an interest in other atomic monolayeric materials.The book analyses flow management, measurement of the local temperature at the nanoscale level and thermoelectric transducers, with reference to both graphene and other 2D nanomaterials. The book covers in detail the mechanisms of thermoelectricity, thermal transport, interface phenomena, quantum dots, non-equilibrium states, scattering and dissipation, as well as coherent transport in low-dimensional junctions in graphene and its allotropes, transition metal dichalcogenides and boron nitride.This book aims to show readers how to improve thermoelectric transducer efficiency in graphene and other nanomaterials. The book describes basic ingredients of such activity, allowing readers to gain a greater understanding of fundamental issues related to the heat transport and the thermoelectric phenomena of nanomaterials. It contains a thorough analysis and comparison between theory and experiments, complemented with a variety of practical examples.- Shows readers how to improve the efficiency of heat transfer in graphene and other nanomaterials with analysis of different methodologies- Includes fundamental information on the thermoelectric properties of graphene and other atomic monolayers, providing a valuable reference source for materials scientists and engineers- Covers the important models of thermoelectric phenomena and thermal transport in the 2D nanomaterials and nanodevices, allowing readers to gain a greater understanding of the factors behind the efficiency of heat transport in a variety of nanomaterials

Chapter 1

Thermal transport in graphene and its allotropes

Abstract

In this chapter, using a simplest model, we introduce the figure of merit, characterizing the overall efficiency of thermoelectric transducers. Then we describe different components of the thermal flux. Among the components of the heat transport we briefly discuss the mechanisms of the heat transfer due do conduction, the convective heat transfer, transient heat transfer, the real bodies versus the Kirchhoff’s law, radiation heat transfer between planar surfaces and the Matthiessen’s rule. Furthermore, we briefly discuss the emission and absorption of phonons, electron–electron scattering, mechanisms of the electric and thermal conductivity of semiconductors, determining the phonon and electron fractions of the heat flow in graphene. Basic scenario of the thermal transport in graphene depends on the spectrum of the crystal lattice oscillations, phonons and on the spectrum of electron excitations. Therefore, we consider details of electronic spectrum of graphene at the end of this chapter.

Keywords

figure of merit

thermoelectric transducer

thermal flux

convective heat transfer

transient heat transfer

Matthiessen’s rule

phonon spectrum

1.1. Thermoelectric transducer

This chapter conside...

Table of contents

• Cover
• Title page
• Table of Contents
• Copyright
• Preface
• Introduction
• Chapter 1: Thermal transport in graphene and its allotropes
• Chapter 2: Lattice dynamics and thermal flux
• Chapter 3: Graphene thermoelectric transducers
• Chapter 4: Experimental study of thermoelectricity in carbon nanotubes and graphene
• Chapter 5: Role of structural defects and imperfections
• Chapter 6: Contribution of many-body effects into thermoelectricity and heat transport in graphene
• Chapter 7: Principles of thermoelectric transport on nanoscale
• Chapter 8: THz-induced thermoelectric and thermal transport in atomic monolayers
• Index