In-plane lattice thermal conductivities of multilayer graphene films
In-plane lattice thermal conductivities of multilayer graphene films
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DOI：
10.1016/j.carbon.2011.02.051
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发表时间：
2011-07
期刊：
影响因子：
10.9
通讯作者：
Zhiyong Wei;Z. Ni;Kedong Bi;Minhua Chen;Yunfei Chen
中科院分区：
文献类型：
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作者：
Zhiyong Wei;Z. Ni;Kedong Bi;Minhua Chen;Yunfei Chen
采用非平衡态分子动力学模拟方法研究了单层和多层石墨烯薄膜的面内晶格热导率。结果表明，单层石墨烯的热导率高于多层石墨烯。增加相邻层之间的结合强度将降低多层石墨烯膜的面内热导率。来自相邻层的约束起着阻碍多层石墨烯膜中声子沿面内方向沿着传输的作用。这一观察结果意味着单层石墨烯的热导率在实际应用中一旦被键合到衬底上就会降低。
The in-plane lattice thermal conductivities of a single layer and multilayer graphene films are investigated using nonequilibrium molecular dynamics simulations. It is found the thermal conductivity of a single layer graphene is higher than that of multilayer graphene. Increasing the bonding strength between neighboring layers will reduce the in-plane thermal conductivity for multilayer graphene films. The constraints from the neighboring layer play the role of impeding phonon transport along the in-plane direction in multilayer graphene films. This observation implies the thermal conductivity of a single layer graphene will be reduced in practical applications once it is bonded on a substrate.