Ripening of monolayer vacancy pits on metal surfaces: Pathways, energetics, and size-scaling for Ag(111) versus Ag(100) Thiel, Patricia Shen, Mingmin Wen, J.-M. Jenks, Cynthia Thiel, Patricia Liu, Da-Jiang Evans, James Evans, James
dc.contributor.department Ames Laboratory
dc.contributor.department Mathematics
dc.contributor.department Chemistry 2018-02-13T12:50:51.000 2020-06-30T01:19:21Z 2020-06-30T01:19:21Z Mon Jan 01 00:00:00 UTC 2007 2013-06-25 2007-01-01
dc.description.abstract <p>Scanning tunneling microscopy studies have revealed that monolayer-deep vacancy pits typically coarsen at 300 K via Smoluchowski ripening (SR) on Ag(111) surfaces and via Ostwald ripening (OR) on Ag(100) surfaces. We elucidate the underlying atomistic processes, the relevant energetics with some input from density functional theory analysis, and also the scaling of the ripening rate with mean pit size. Size scaling for SR reflects the size dependence of the pit diffusion coefficient, so we also discuss observed deviations from classical theories. SR dominates OR for pits on Ag(111) primarily due to its significantly lower effective energy barrier. However, the effective barrier for OR is not lower than that for SR for pits on Ag(100), and one must also account for the distinct size scaling of these pathways to explain the dominance of OR. We also briefly discuss the dependence on temperature of the dominant ripening pathway and the ripening behavior for adatom islands.</p>
dc.description.comments <p>This article is from <em>Physical Review B</em> 75, no. 24 (2007): 245409, doi:<a href="" target="_blank">10.1103/PhysRevB.75.245409</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1032
dc.identifier.contextkey 4258013
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/33
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:37:18 UTC 2022
dc.source.uri 10.1103/PhysRevB.75.245409
dc.subject.disciplines Mathematics
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Ames Laboratory
dc.subject.keywords Mathematics
dc.title Ripening of monolayer vacancy pits on metal surfaces: Pathways, energetics, and size-scaling for Ag(111) versus Ag(100)
dc.type article
dc.type.genre article
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