Functionalization mediates heat transport in graphene nanoflakes

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Han, Haoxue Zhang, Yong Wang, Nan Samani, Majid Kabiri Ni, Yuxiang Mijbil, Zainelabideen Y. Edwards, Michael Xiong, Shiyun Sääskilahti, Kimmo Murugesan, Murali Fu, Yifeng Ye, Lilei Sadeghi, Hatef Bailey, Steven Kosevich, Yuriy A. Lambert, Colin J. Liu, Johan Volz, Sebastian 2017-01-19T11:14:24Z 2016-04-29
dc.identifier.citation Han , H , Zhang , Y , Wang , N , Samani , M K , Ni , Y , Mijbil , Z Y , Edwards , M , Xiong , S , Sääskilahti , K , Murugesan , M , Fu , Y , Ye , L , Sadeghi , H , Bailey , S , Kosevich , Y A , Lambert , C J , Liu , J & Volz , S 2016 , ' Functionalization mediates heat transport in graphene nanoflakes ' NATURE COMMUNICATIONS , vol 7 , 11281 . DOI: 10.1038/ncomms11281 en
dc.identifier.issn 2041-1723
dc.identifier.other PURE UUID: d09b16a2-d9f5-40c6-8eef-3ed6a76a9743
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract The high thermal conductivity of graphene and few-layer graphene undergoes severe degradations through contact with the substrate. Here we show experimentally that the thermal management of a micro heater is substantially improved by introducing alternative heat-escaping channels into a graphene-based film bonded to functionalized graphene oxide through amino-silane molecules. Using a resistance temperature probe for in situ monitoring we demonstrate that the hotspot temperature was lowered by ∼28°C for a chip operating at 1,300 W cm-2. Thermal resistance probed by pulsed photothermal reflectance measurements demonstrated an improved thermal coupling due to functionalization on the graphene-graphene oxide interface. Three functionalization molecules manifest distinct interfacial thermal transport behaviour, corroborating our atomistic calculations in unveiling the role of molecular chain length and functional groups. Molecular dynamics simulations reveal that the functionalization constrains the cross-plane phonon scattering, which in turn enhances in-plane heat conduction of the bonded graphene film by recovering the long flexural phonon lifetime. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries NATURE COMMUNICATIONS en
dc.relation.ispartofseries Volume 7 en
dc.rights openAccess en
dc.subject.other Biochemistry, Genetics and Molecular Biology(all) en
dc.subject.other Chemistry(all) en
dc.subject.other Physics and Astronomy(all) en
dc.subject.other 1182 Biochemistry, cell and molecular biology en
dc.title Functionalization mediates heat transport in graphene nanoflakes en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Inria Université Paris-Saclay
dc.contributor.department Chalmers University of Technology
dc.contributor.department University of Minnesota
dc.contributor.department Al-Qasim Green University
dc.contributor.department Max Planck Institute for Polymer Research
dc.contributor.department Department of Neuroscience and Biomedical Engineering
dc.contributor.department SHT Smart High Tech AB
dc.contributor.department Lancaster University
dc.contributor.department RAS - N.N. Semenov Institute of Chemical Physics
dc.subject.keyword Biochemistry, Genetics and Molecular Biology(all)
dc.subject.keyword Chemistry(all)
dc.subject.keyword Physics and Astronomy(all)
dc.subject.keyword 1182 Biochemistry, cell and molecular biology
dc.identifier.urn URN:NBN:fi:aalto-201701191286
dc.identifier.doi 10.1038/ncomms11281
dc.type.version publishedVersion

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