Experimental study on thermal conductivity of free-standing fluorinated single-layer graphene
Experimental study on thermal conductivity of free-standing fluorinated single-layer graphene
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DOI：
10.1063/1.5001169
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发表时间：
2017-08
影响因子：
4
通讯作者：
M. Narasaki;Haidong Wang;T. Nishiyama;T. Ikuta;Koji Takahashi
中科院分区：
文献类型：
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作者：
M. Narasaki;Haidong Wang;T. Nishiyama;T. Ikuta;Koji Takahashi
我们使用精确的T型方法测量了自支撑氟化单层石墨烯（FSLG）的热导率。使用二氟化氙气体将原始石墨烯氟化并悬浮在衬底上方。与先前通过相同的T型方法针对相同的原始单层石墨烯（SLG）测量的原始单层石墨烯（SLG）的热导率（2000 W/mK）相比，FSLG表现出低得多的热导率（2080 W/mK）并且热导率对纳米孔缺陷的弱依赖性。实验结果表明，FSLG中的氟原子和sp3键对声子散射有很强的贡献。声子散射的氟原子和sp3键的热导率下降的影响占主导地位的纳米孔缺陷的声子散射。该研究为二维氟化材料的热测量奠定了基础，有利于氟化石墨烯的未来应用。
We measured the thermal conductivity of free-standing fluorinated single-layer graphene (FSLG) using a precise T-type method. Pristine graphene was fluorinated and suspended above the substrate using xenon difluoride gas. Compared with the thermal conductivity of pristine single-layer graphene (SLG) (∼2000 W/mK) previously measured by the same T-type method for the same original SLG, the FSLG exhibited a much lower thermal conductivity (∼80 W/mK) and a weak dependence of the thermal conductivity on nanohole defects. The experimental results suggest that the fluorine atoms and sp3 bonding in the FSLG strongly contributed to phonon scattering. The phonon scattering by the fluorine atoms and sp3 bonding has a dominant effect on the thermal conductivity decrease over the phonon scattering by nanohole defects. This study lays a foundation for the thermal measurement of 2D fluorinated materials and benefits future applications of fluorinated graphene.