Theory of Liquid Film Growth and Wetting Instabilities on Graphene.
Theory of Liquid Film Growth and Wetting Instabilities on Graphene.
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石墨烯液膜生长和润湿不稳定性理论
DOI:
10.1103/physrevlett.120.236802
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发表时间:
2018
影响因子:
8.6
通讯作者:
Valeri N. Kotov
中科院分区:
文献类型:
--
作者:
Sanghita Sengupta;Nathan S. Nichols;Adrian Del Maestro;Valeri N. Kotov
We investigate wetting phenomena near graphene within the Dzyaloshinskii-Lifshitz-Pitaevskii theory for light gases of hydrogen, helium, and nitrogen in three different geometries where graphene is either affixed to an insulating substrate, submerged or suspended. We find that the presence of graphene has a significant effect in all configurations. When placed on a substrate, the polarizability of graphene can increase the strength of the total van der Waals force by a factor of 2 near the surface, enhancing the propensity towards wetting. In a suspended geometry unique to two-dimensional materials, where graphene is able to wet on only one side, liquid film growth becomes arrested at a critical thickness, which may trigger surface instabilities and pattern formation analogous to spinodal dewetting. The existence of a mesoscopic critical film with a tunable thickness provides a platform for the study of a continuous wetting transition, as well as the engineering of custom liquid coatings. These phenomena are robust to some mechanical deformations and are also universally present in doped graphene and other two-dimensional materials, such as monolayer dichalcogenides.
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DOI:
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