Obtaining the state of matter inside graphene nanobubble from its shape

ES Iakovlev and PA Zhilyaev and IS Akhatov, XXXIII INTERNATIONAL CONFERENCE ON EQUATIONS OF STATE FOR MATTER, 1147, 012006 (2019).

DOI: 10.1088/1742-6596/1147/1/012006

Graphene nanobubble (GN) is a system consisting of the substrate, the graphene sheet and the substance trapped between them. Radius of GN regulates the pressure inside the bubble and for small GN with radius of several nanometers extreme pressures up to 1 GPa due to the van der Waals interaction can be observed. Therefore trapped substances inside GN can exist in a number of different states of matter. In this study we theoretically establish the connection between the shape of GN and the state of the trapped material inside. Both atomistic and continuum models are used to describe mechanical and thermodynamic properties of GN. Atomistic approach is applied to calculate the elastic constants and the adhesion energies. These parameters are used as inputs for the following analyses in terms of continuum media.

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