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Repulsive van der W...
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Boström, MathiasLinköpings universitet,Teoretisk Fysik,Tekniska högskolan
(author)
Repulsive van der Waals forces due to hydrogen exposure on bilayer graphene
- Article/chapterEnglish2012
Publisher, publication year, extent ...
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American Physical Society,2012
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:liu-74639
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-74639URI
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https://doi.org/10.1103/PhysRevA.85.012508DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Funding Agencies|VR Contract|70529001|
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We consider the effect of atomic hydrogen exposure to a system of two undoped sheets of graphene grown near a silica surface (the first adsorbed to the surface and the second freestanding near the surface). In the absence of atomic hydrogen, the van der Waals force between the sheets is attractive at all separations, causing the sheets to come closer together. However, with the addition of atomic hydrogen between the sheets, the long-range van der Waals interaction turns repulsive at a critical concentration. The underlying triple layer structure (SiO(2)-atomic hydrogen gas-air) gives rise to a long-range repulsion that at large-enough separations dominates over the more rapidly decaying attraction between the two-dimensional undoped graphene sheets (and between the outer graphene sheet and SiO(2)). This may be an avenue to tune the separation between two graphene sheets with the gas concentration. The doping of the graphene layers increases the attractive part of the interaction and hence reduces the net repulsive interaction.
Subject headings and genre
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TECHNOLOGY
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TEKNIKVETENSKAP
Added entries (persons, corporate bodies, meetings, titles ...)
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Sernelius, BoLinköpings universitet,Teoretisk Fysik,Tekniska högskolan(Swepub:liu)bose02
(author)
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Linköpings universitetTeoretisk Fysik
(creator_code:org_t)
Related titles
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In:Physical Review A. Atomic, Molecular, and Optical Physics: American Physical Society85:1, s. 012508-1050-29471094-1622
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