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首页> 外文期刊>Nanotechnology >Nonlocal laser annealing to improve thermal contacts between multi-layer graphene and metals
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Nonlocal laser annealing to improve thermal contacts between multi-layer graphene and metals

机译：非局部激光退火以改善多层石墨烯与金属之间的热接触

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摘要

The accuracy of thermal conductivity measurements by the micro-Raman technique for suspended multi-layer graphene flakes has been shown to depend critically on the quality of the thermal contacts between the flakes and the metal electrodes used as the heat sink. The quality of the contacts can be improved by nonlocal laser annealing at increased power. The improvement of the thermal contacts to initially rough metal electrodes is attributed to local melting of the metal surface under laser heating, and increased area of real metal-graphene contact. Improvement of the thermal contacts between multi-layer graphene and a silicon oxide surface was also observed, with more efficient heat transfer from graphene as compared with the graphene-metal case.
机译：通过微拉曼技术对悬浮的多层石墨烯薄片的导热系数测量的精度已显示出关键取决于薄片与用作散热片的金属电极之间的热接触质量。可以通过增加功率的非局部激光退火来改善触点的质量。与最初的粗糙金属电极的热接触的改善归因于在激光加热下金属表面的局部熔化，以及实际金属-石墨烯接触的面积增加。还观察到了多层石墨烯与氧化硅表面之间的热接触的改善，与石墨烯-金属的情况相比，来自石墨烯的传热效率更高。

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