Fundamentals of Au(111) Surface Dynamics: Coarsening of 2D Au Islands

dc.contributor.author Thiel, Patricia
dc.contributor.author Spurgeon, Peter
dc.contributor.author Lai, King
dc.contributor.author Han, Yong
dc.contributor.author Evans, James
dc.contributor.author Thiel, Patricia
dc.contributor.author Evans, James
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.contributor.department Materials Science and Engineering
dc.contributor.department Chemistry
dc.date 2020-04-22T04:16:00.000
dc.date.accessioned 2020-06-30T01:17:29Z
dc.date.available 2020-06-30T01:17:29Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2020
dc.date.issued 2020-02-20
dc.description.abstract <p>Au(111) surfaces play a central role in many applications, yet studies of fundamental aspects of their dynamics are limited. Thus, using Scanning Tunneling Microscopy (STM) at 300 K, we analyze the coarsening of first-layer 2D Au islands directly on the Au(111) substrate, and also of second-layer 2D Au islands. Specifically, we monitor the decay of Au first-layer islands with areas of about 100-500 nm^2 in the vicinity of larger islands or extended step edges over a period of approximately 40 hours - the relevant time scale for this process. Experimentally observed behavior is captured by analytic theory for terrace-diffusion-limited decay incorporating DFT results for the Au terrace diffusion barrier and the adatom formation energy. Experimental observations of second layer island decay were also compared with appropriate analytic theory and stochastic simulations, thereby determining the effective Ehrlich-Schwoebel barrier for Au on Au(111).</p>
dc.description.comments <p>This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in <em>The Journal of Physical Chemistry C</em>, copyright © American Chemical Society after peer review. To access the final edited and published work see DOI:<a href="http://dx.doi.org/10.1021/acs.jpcc.9b12056" target="_blank">10.1021/acs.jpcc.9b12056</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/chem_pubs/1211/
dc.identifier.articleid 2215
dc.identifier.contextkey 16662341
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/1211
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/14522
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/1211/2020_ThielPatricia_FundamentalsAu_111_.pdf|||Fri Jan 14 19:13:17 UTC 2022
dc.source.uri 10.1021/acs.jpcc.9b12056
dc.subject.disciplines Biological and Chemical Physics
dc.subject.disciplines Materials Chemistry
dc.subject.disciplines Physical Chemistry
dc.title Fundamentals of Au(111) Surface Dynamics: Coarsening of 2D Au Islands
dc.type article
dc.type.genre article
dspace.entity.type Publication
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