Nanoparticle Shape Selection by Repulsive Interactions: Metal Islands on Few-Layer Graphene

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dc.contributor.authorSomers, Luke A
dc.contributor.authorJohnson, Charlie
dc.contributor.authorMele, Eugene J
dc.contributor.authorZimbovskaya, Natalya A
dc.date2023-05-17T05:27:40.000
dc.date.accessioned2023-05-23T00:28:00Z
dc.date.available2023-05-23T00:28:00Z
dc.date.issued2010-01-01
dc.date.submitted2010-10-13T07:56:46-07:00
dc.description.abstractMetal atoms adsorbed on few-layer graphenes condense to form nanometer-size droplets whose growth is size limited by a competition between the surface tension and repulsive electrostatic interactions from charge transfer between the metal droplet and the graphene. For situations where the work-function mismatch is large and the droplet surface tension is small, a growing droplet can be unstable to a family of shape instabilities. We observe this phenomenon for Yb deposited and annealed on few-layer graphenes and develop a theoretical model to describe it by studying the renormalization of the line tension of a two-dimensional droplet by repulsive interparticle interactions. Our model describes the onset of shape instabilities for nanoparticles where the growth is size limited by a generic repulsive potential and provides a good account of the experimentally observed structures for Yb on graphene.
dc.description.commentsSuggested Citation: Somers, L.A., N.A. Zimbovskaya, A.T. Johnson and E.J. Mele. (2010). Nanoparticle shape selection by repulsive interactions: Metal islands on few-layer graphene. Physical Review B. 82, 115430. Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physical Review B and may be found at http://dx.doi.org/10.1103/PhysRevB.82.115430.
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/43412
dc.legacy.articleid1011
dc.legacy.fieldstrue
dc.legacy.fulltexturlhttps://repository.upenn.edu/cgi/viewcontent.cgi?article=1011&context=physics_papers&unstamped=1
dc.source.issue7
dc.source.journalDepartment of Physics Papers
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.subject.otherPhysical Sciences and Mathematics
dc.subject.otherPhysics
dc.titleNanoparticle Shape Selection by Repulsive Interactions: Metal Islands on Few-Layer Graphene
dc.typeArticle
digcom.contributor.authorisAuthorOfPublication|email:lsomers@sas.upenn.edu|institution:University of Pennsylvania|Somers, Luke A
digcom.contributor.authorZimbovskaya, Natalya A
digcom.contributor.authorisAuthorOfPublication|email:cjohnson@physics.upenn.edu|institution:University of Pennsylvania|Johnson, Charlie
digcom.contributor.authorisAuthorOfPublication|email:mele@physics.upenn.edu|institution:University of Pennsylvania|Mele, Eugene J
digcom.identifierphysics_papers/7
digcom.identifier.contextkey1602749
digcom.identifier.submissionpathphysics_papers/7
digcom.typearticle
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery52e97daf-aea0-4c58-b553-abfb30ad570b
upenn.schoolDepartmentCenterDepartment of Physics Papers
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