Electrostatic interactions between graphene layers and their environment
Electrostatic interactions between graphene layers and their environment
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DOI：
10.1103/physrevb.77.195409
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发表时间：
2008-05-01
影响因子：
3.7
通讯作者：
Sols, F.
中科院分区：
文献类型：
--
作者：
Sabio, J.;Seoanez, C.;Sols, F.
我们分析了单个石墨烯与SiO_2衬底之间的静电相互作用，以及可能存在于其环境中的其他材料。我们得到先导效应来自于SiO_2表面的极性模和可能在石墨烯片层和衬底之间形成层的水分子。相互作用的强度意味着石墨烯被钉扎到衬底上的距离大于几个晶格间距。对于石墨烯纳米机电系统，以及石墨烯和扫描隧道显微镜针尖之间的相互作用，也进行了讨论。
We analyze the electrostatic interactions between a single graphene layer and a SiO2 substrate, and other materials which may exist in its environment. We obtain that the leading effects arise from the polar modes at the SiO2 surface, and water molecules, which may form layers between the graphene sheet and the substrate. The strength of the interactions implies that graphene is pinned to the substrate at distances greater than a few lattice spacings. The implications for graphene nanoelectromechanical systems, and for the interaction between graphene and a scanning tunneling microscopy tip, are also considered.