Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/134991
Title: HEAT TRANSPORT BY PHONONS AND ELECTRONS ACROSS GRAPHENE INTERFACES AND GRAPHENE-BASED NANOSTRUCTURES
Authors: HUANG BIN
Keywords: Graphene, nanoscale heat transfer, interfaces, phonons, time-domain thermoreflectance
Issue Date: 15-Aug-2016
Citation: HUANG BIN (2016-08-15). HEAT TRANSPORT BY PHONONS AND ELECTRONS ACROSS GRAPHENE INTERFACES AND GRAPHENE-BASED NANOSTRUCTURES. ScholarBank@NUS Repository.
Abstract: Due to high in-plane thermal conductivity of graphene, heat dissipation in graphene devices is primarily governed by the thermal resistance of metal/graphene interface. First, we compared the thermal conductance (G) of Al/trG/Cu and Al/grG/Cu to investigation which of the following factors: roughness, residues, oxides, conformity and voids could reduce the G of graphene interfaces. Second, we measured the G of Al/trG/Cu, Al/grG/Cu, Au/trG/Au, Ag/trG/Ag, and Pd/trG/Pd, and demonstrated that electrons do not play a crucial role in heat transfer across graphene interfaces, regardless of whether the metals are physisorbed or chemisorbed. We also demonstrate a convenient approach to enhance electronic heat transfer across metal/graphene interfaces by depositing the top Pd layer of Pd/trG/Pd interfaces using rf magnetron sputtering. Finally, we prepared metal/graphene heterostructures with the ratio of phononic and electronic thermal conductivity Λph / Λe ≈1 at room temperature, despite the ultralow thermal conductivity of ≈0.1 W m-1 K-1.
URI: http://scholarbank.nus.edu.sg/handle/10635/134991
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
HuangB.pdf19.32 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

51
checked on Jul 10, 2020

Download(s)

21
checked on Jul 10, 2020

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.