Spacing between graphene and metal substrates studied with total-reflection high-energy positron diffraction
Spacing between graphene and metal substrates studied with total-reflection high-energy positron diffraction
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DOI：
10.1016/j.carbon.2016.03.006
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发表时间：
2016-07-01
期刊：
影响因子：
10.9
通讯作者：
Shamoto, Shin-ichi
中科院分区：
文献类型：
--
作者：
Fukaya, Yuki;Entani, Shiro;Shamoto, Shin-ichi
利用全反射高能正电子衍射（TRHEPD）研究了石墨烯与金属衬底之间的间距。基于动态衍射理论的摇摆曲线分析表明，石墨烯层与Cu（111）衬底之间的间距为3.34埃，与Co（0001）衬底之间的间距为2.06埃。前者接近石墨中的层间间距，表明与衬底材料的相互作用较弱，而后者的值通过实验验证，在Co（0001）上的石墨烯中，与衬底存在强相互作用。(C) 2016 Elsevier Ltd.版权所有。
The spacing between graphene and metal substrates has been investigated using total-reflection high-energy positron diffraction (TRHEPD). The rocking curve analysis performed, based on the dynamical diffraction theory, shows that the spacing between the graphene layer and a substrate of Cu(111) and that between graphene and a Co(0001) substrate are 3.34 angstrom and 2.06 angstrom, respectively. The former is close to the interlayer spacing in graphite, suggesting a weak interaction with the substrate material, whereas the latter value experimentally verifies that, in the case of graphene on Co(0001), there is a strong interaction with the substrate. (C) 2016 Elsevier Ltd. All rights reserved.