title: Three-Dimensional Porous Copper-Graphene Heterostructures with Durability and High Heat Dissipation Performance.
abstract: Porous materials have historically been of interest for a wide range of applications in thermal management, for example, in heat exchangers and thermal barriers. Rapid progress in electronic and optoelectronic technology necessitates more efficient spreading and dissipation of the heat generated in these devices, calling for the development of new thermal management materials. Here, we report an effective technique for the synthesis of porous Cu-graphene heterostructures with pores of about 30 μm and a porosity of 35%. Graphene layers were grown on the surfaces of porous Cu, which was formed via the coalescence of molten Cu microparticles. The surface passivation with graphene layers resulted in a thermal conductivity higher than that of porous Cu, especially at high temperatures (approximately 40% at 1173 K). The improved heat dissipation properties of the porous structures were demonstrated by analysis of the thermal resistance and temperature distribution of LED chips mounted on the structures. The effective combination of the structural and material properties of porous Cu-graphene heterostructures provides a new material for effective thermal management of high-power electronic and optoelectronic devices.
authors.affiliation: 1] Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea [2] Department of Advanced Chemicals &Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Hokyun
authors.initials: H
authors.lastname: Rho
authors.affiliation: Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea.
authors.forename: Seungmin
authors.initials: S
authors.lastname: Lee
authors.affiliation: Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea.
authors.forename: Sukang
authors.initials: S
authors.lastname: Bae
authors.affiliation: 1] Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea [2] Department of Nanomaterials and Nano Science, Korea University of Science and Technology (UST), Daejeon 305-350, Republic of Korea.
authors.forename: Tae-Wook
authors.initials: TW
authors.lastname: Kim
authors.affiliation: 1] Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea [2] Department of Nanomaterials and Nano Science, Korea University of Science and Technology (UST), Daejeon 305-350, Republic of Korea.
authors.forename: Dong Su
authors.initials: DS
authors.lastname: Lee
authors.affiliation: Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea.
authors.forename: Hyun Jung
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea.
authors.forename: Jun Yeon
authors.initials: JY
authors.lastname: Hwang
authors.affiliation: Korea Photonics Technology Institute, Gwangju 500-779, Republic of Korea.
authors.forename: Tak
authors.initials: T
authors.lastname: Jeong
authors.affiliation: School of Polymer Science and Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Sungmin
authors.initials: S
authors.lastname: Kim
authors.affiliation: 1] Department of Advanced Chemicals &Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea [2] Optoelectronics Convergence Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Jun-Seok
authors.initials: JS
authors.lastname: Ha
authors.affiliation: 1] Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Joellabuk-do 565-905, Republic of Korea [2] Department of Nanomaterials and Nano Science, Korea University of Science and Technology (UST), Daejeon 305-350, Republic of Korea.
authors.forename: Sang Hyun
authors.initials: SH
authors.lastname: Lee