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Article Dans Une Revue Carbon Année : 2021

Delamination of multilayer graphene stacks from its substrate through wrinkle formation under high pressures

Résumé

There is a need to find new paths for van der Waals 2D-systems detachment and transfer or to control their adhesion state in different environments. We have observed that supported multilayer graphene immersed in a fluid can be detached from a substrate through pressure application. The process is based on the development of wrinkles originated by the difference of in-plane-compressibility between the graphene stacks and the substrate. Graphene stacks comprised between 9 and 110 layers and immersed in various fluids allowed to investigate the growth and evolution of wrinkles with increasing pressure. The detachment from the substrate stops at the pressure-induced fluid solidification. Methanol, ethanol or their mixtures favor the pressure-induced wrinkle formation in SiO 2 /Si substrates. In these cases, the pressure evolution of the delamination process follows a universal behavior independently of the number of graphene layers with a complete delamination at /sim4GPa. The quantitative analysis of the wrinkle geometry evolution can be consistently interpreted as due to a pressure-induced increase of the bending stiffness of the graphene stacks, or a reduction of the adhesion forces between the sample and the substrate, or both. These results should also be of practical use in high-pressure experiments of van der Waals systems.
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Dates et versions

hal-03355812 , version 1 (27-09-2021)

Identifiants

Citer

I.R. R Amaral, A. Forestier, A. Piednoir, R. Galafassi, Colin Bousige, et al.. Delamination of multilayer graphene stacks from its substrate through wrinkle formation under high pressures. Carbon, 2021, 185, pp.242-251. ⟨10.1016/j.carbon.2021.09.029⟩. ⟨hal-03355812⟩
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