Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/134991
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dc.titleHEAT TRANSPORT BY PHONONS AND ELECTRONS ACROSS GRAPHENE INTERFACES AND GRAPHENE-BASED NANOSTRUCTURES
dc.contributor.authorHUANG BIN
dc.date.accessioned2017-03-07T18:00:15Z
dc.date.available2017-03-07T18:00:15Z
dc.date.issued2016-08-15
dc.identifier.citationHUANG BIN (2016-08-15). HEAT TRANSPORT BY PHONONS AND ELECTRONS ACROSS GRAPHENE INTERFACES AND GRAPHENE-BASED NANOSTRUCTURES. ScholarBank@NUS Repository.
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/134991
dc.description.abstractDue 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 (<I>G</I>) of Al/trG/Cu and Al/grG/Cu to investigation which of the following factors: roughness, residues, oxides, conformity and voids could reduce the <I>G</I> of graphene interfaces. Second, we measured the <I>G</I> 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 Λ<SUB>ph</SUB> / Λ<SUB>e</SUB> ≈1 at room temperature, despite the ultralow thermal conductivity of ≈0.1 W m<SUP>-1</SUP> K<SUP>-1</SUP>.
dc.language.isoen
dc.subjectGraphene, nanoscale heat transfer, interfaces, phonons, time-domain thermoreflectance
dc.typeThesis
dc.contributor.departmentMECHANICAL ENGINEERING
dc.contributor.supervisorKOH YEE KAN
dc.description.degreePh.D
dc.description.degreeconferredDOCTOR OF PHILOSOPHY
dc.identifier.isiutNOT_IN_WOS
Appears in Collections:Ph.D Theses (Open)

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