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Probing the shape of a graphene nanobubble
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 3
2017 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 19, no 11, 7465-7470 p.Article in journal (Refereed) Published
Abstract [en]

Gas molecules trapped between graphene and various substrates in the form of bubbles are observed experimentally. The study of these bubbles is useful in determining the elastic and mechanical properties of graphene and adhesion energy between graphene and the substrate, and manipulating the electronic properties via strain engineering. In our numerical simulations, we use a simple description of the elastic potential and adhesion energy to show that for small gas bubbles (similar to 10 nm) the van derWaals pressure is in the order of 1 GPa. These bubbles show universal shape behavior irrespective of their size, as observed in recent experiments. With our results, the shape and volume of the trapped gas can be determined via the vibrational density of states (VDOS) using experimental techniques such as inelastic electron tunneling and inelastic neutron scattering. The elastic energy distribution in the graphene layer which traps the nanobubble is homogeneous apart from its edge, but the strain depends on the bubble size; thus variation in bubble size allows control of the electronic and optical properties.

Place, publisher, year, edition, pages
2017. Vol. 19, no 11, 7465-7470 p.
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-142413DOI: 10.1039/c6cp08535kISI: 000397569900003PubMedID: 28256643OAI: oai:DiVA.org:su-142413DiVA: diva2:1092657
Available from: 2017-05-03 Created: 2017-05-03 Last updated: 2017-05-03Bibliographically approved

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Juricic, Vladimir
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