Destabilization of Ag nanoislands on Ag(100) by adsorbed sulfur

dc.contributor.author Shen, Mingmin
dc.contributor.author Russell, Selena
dc.contributor.author Thiel, Patricia
dc.contributor.author Liu, Da-Jiang
dc.contributor.author Thiel, Patricia
dc.contributor.department Chemistry
dc.date 2018-02-13T12:46:01.000
dc.date.accessioned 2020-06-30T01:15:51Z
dc.date.available 2020-06-30T01:15:51Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 2011
dc.date.embargo 2013-06-24
dc.date.issued 2011-01-01
dc.description.abstract <p>Sulfur accelerates coarsening of Ag nanoislands on Ag(100) at 300 K, and this effect is enhanced with increasing sulfur coverage over a range spanning a few hundredths of a monolayer, to nearly 0.25 monolayers. We propose that acceleration of coarsening in this system is tied to the formation of AgS<sub>2</sub> clusters primarily at step edges. These clusters can transport Ag more efficiently than can Ag adatoms (due to a lower diffusion barrier and comparable formation energy). The mobility of isolated sulfur on Ag(100) is very low so that formation of the complex is kinetically limited at low sulfur coverages, and thus enhancement is minimal. However, higher sulfur coverages force the population of sites adjacent to step edges, so that formation of the cluster is no longer limited by diffusion of sulfur across terraces. Sulfur exerts a much weaker effect on the rate of coarsening on Ag(100) than it does on Ag(111). This is consistent with theory, which shows that the difference between the total energy barrier for coarsening with and without sulfur is also much smaller on Ag(100) than on Ag(111).</p>
dc.description.comments <p>Reprinted with permission from <em>The Journal of Physical Chemistry C</em> 135, no. 15 (2011): 154701, doi:<a href="http://dx.doi.org/10.1063/1.3635777" target="_blank">10.1063/1.3635777</a>. Copyright 2011 American Chemical Society.</p>
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dc.identifier archive/lib.dr.iastate.edu/chem_pubs/10/
dc.identifier.articleid 1012
dc.identifier.contextkey 4255296
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/10
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/14292
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/10/2011_ShenM_DestabilizationAgNanoislands.pdf|||Fri Jan 14 18:03:51 UTC 2022
dc.source.uri 10.1063/1.3635777
dc.subject.disciplines Biological and Chemical Physics
dc.subject.disciplines Life Sciences
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Ames Laboratory
dc.subject.keywords Materials Science and Engineering
dc.subject.keywords adsorption
dc.subject.keywords diffusion barriers
dc.subject.keywords island structure
dc.subject.keywords monolayers
dc.subject.keywords nanostructured materials
dc.subject.keywords silver
dc.subject.keywords sulphur
dc.title Destabilization of Ag nanoislands on Ag(100) by adsorbed sulfur
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 5e15742e-5866-486b-999c-75a0a6b554e4
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
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