氧化石墨烯膜是一类新型的层状材料。本文报道了氧化石墨烯膜的面内和垂直于面方向的热扩散率和热导率，发现垂直于面方向的热导率比面内热导率低一个数量级，展示了明显的各向异性特征。氧化石墨烯膜的导热系数远低于单层石墨烯的导热系数，其原因主要是由于氧化石墨烯膜间的接触热租和氧化石墨烯膜本身导热系数较低造成的。
Graphene oxide film is a new kind of layered material. In this work, the anisotropic thermal transport in graphene oxide films is reported. The real thermal diffusivity along cross-plane direction is about one order of magnitude below that along in-plane direction, illustrating the strong anisotropic thermal transport at different directions. The thermal conductivity of graphene oxide film is far below than that of single layer graphene. The thermal contact resistance between the adjacent graphene oxide and the low thermal conductivity of graphene oxide may be the major factors influencing the heat transport in graphene oxide film.
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