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Thermal transport in MoS2/Graphene hybrid nanosheets

机译:MoS2 /石墨烯杂化纳米片中的热传输

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Heat dissipation is a very critical problem for designing nano-functional devices, including MoS2/graphene heterojunctions. In this paper we investigate thermal transport in MoS2/graphene hybrid nanosheets under various heating conditions, by using molecular dynamics simulation. Diverse transport processes and characteristics, depending on the conducting layers, are found in these structures. The thermal conductivities can be tuned by interlayer coupling, environment temperature, and interlayer overlap. The highest thermal conductivity at room temperature is achieved as more than 5 times of that of single-layer MoS2 when both layers are heated and 100% overlapped. Different transport mechanisms in the hybrid nanosheets are explained by phonon density of states, temperature distribution, and interlayer thermal resistance. Our results could not only provide clues to master the heat transport in functional devices based on MoS2/graphene heterojunctions, but are also useful for analyzing thermal transport in other van der Waals hybrid nanosheets.
机译:对于设计包括MoS2 /石墨烯异质结的纳米功能器件,散热是一个非常关键的问题。在本文中,我们使用分子动力学模拟研究了MoS2 /石墨烯杂化纳米片在各种加热条件下的热传输。在这些结构中发现了不同的传输过程和特性,具体取决于导电层。可以通过层间耦合,环境温度和层间重叠来调节热导率。当两层都加热并且100%重叠时,在室温下获得的最高导热率是单层MoS2的5倍以上。通过状态的声子密度,温度分布和层间热阻解释了杂化纳米片中的不同传输机制。我们的研究结果不仅可以为掌握基于MoS2 /石墨烯异质结的功能器件中的热传递提供线索,而且对于分析其他范德华杂化纳米片中的热传递也很有用。

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