Статья

Functionalization mediates heat transport in graphene nanoflakes

Haoxue HanCentraleSupélecYong ZhangElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenNan WangElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenMajid Kabiri SamaniElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenYuxiang NiDepartment of Mechanical Engineering, University of Minnesota, 111 Church Street SE, Minneapolis, Minnesota 55455, USAZainelabideen Y. MijbilQuantum Technology Center, Physics Department, Lancaster University, Lancaster LA1 4YB, UKMichael EdwardsElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenShiyun XiongMax Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, GermanyK. SääskilahtiDepartment of Biomedical Engineering and Computational Science, Aalto University, FI-00076 Aalto, FinlandMurali MurugesanElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenYifeng FuElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenLilei YeSHT Smart High Tech AB, Ascherbergsgatan 46, SE-411 33 Gothenburg, SwedenHatef SadeghiQuantum Technology Center, Physics Department, Lancaster University, Lancaster LA1 4YB, UKSteven BaileyQuantum Technology Center, Physics Department, Lancaster University, Lancaster LA1 4YB, UKYuriy A. KosevichDepartment of Polymers and Composite Materials, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin Street 4, 119991 Moscow, RussiaColin J. LambertQuantum Technology Center, Physics Department, Lancaster University, Lancaster LA1 4YB, UKJohan LiuElectronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, SE-412 96 Gothenburg, SwedenSébastian VolzLaboratoire EM2C, CNRS, CentraleSupélec, Université Paris-Saclay, Grande Voie des Vignes, 92295 Châtenay-Malabry, France

2016en

ABI

Аннотация

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.

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Идентификаторы

DOI: 10.1038/ncomms11281

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar