Smoluchowski ripening of Ag islands on Ag(100)

dc.contributor.author Thiel, Patricia
dc.contributor.author Stoldt, C.
dc.contributor.author Jenks, Cynthia
dc.contributor.author Thiel, Patricia
dc.contributor.author Cadilhe, A.
dc.contributor.author Evans, James
dc.contributor.author Evans, James
dc.contributor.department Ames Laboratory
dc.contributor.department Mathematics
dc.contributor.department Chemistry
dc.date 2018-02-13T12:55:48.000
dc.date.accessioned 2020-06-30T01:21:34Z
dc.date.available 2020-06-30T01:21:34Z
dc.date.copyright Fri Jan 01 00:00:00 UTC 1999
dc.date.embargo 2013-06-27
dc.date.issued 1999
dc.description.abstract <p>Using scanning tunneling microscopy, we study the post-deposition coarsening of distributions of large, two-dimensional Ag islands on a perfect Ag(100) surface at 295 K. The coarsening process is dominated by diffusion, and subsequent collision and coalescence of these islands. To obtain a comprehensive characterization of the coarsening kinetics, we perform <em>tailored families</em> of experiments, systematically varying the initial value of the average island size by adjusting the amount of Ag deposited (up to 0.25 ML). Results unambiguously indicate a strong decrease in island diffusivity with increasing island size. An estimate of the size scaling exponent follows from a mean-field Smoluchowski rate equation analysis of experimental data. These rate equations also predict a <em>rapid</em> depletion in the initial population of smaller islands. This leads to narrowing of the size distribution scaling function from its initial form, which is determined by the process of island nucleation and growth during deposition. However, for later times, a steady increase in the width of this scaling function is predicted, consistent with observed behavior. Finally, we examine the evolution of Ag adlayers on a strained Ag(100) surface, and find significantly enhanced rates for island diffusion and coarsening.</p>
dc.description.comments <p>The following article appeared in <em>The Journal of Chemical Physics</em> 111, no. 11 (1999): 5157–5166, doi:<a href="http://dx.doi.org/10.1063/1.479770" target="_blank">10.1063/1.479770</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/chem_pubs/62/
dc.identifier.articleid 1067
dc.identifier.contextkey 4263644
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/62
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/15096
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/62/1999_ThielPA_SmoluchowskiRipeningAg.pdf|||Sat Jan 15 01:17:45 UTC 2022
dc.source.uri 10.1063/1.479770
dc.subject.disciplines Mathematics
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Institute of Physical Research and Technology
dc.subject.keywords scanning tunnelling microsopy
dc.subject.keywords nucleation
dc.subject.keywords adsorbed layers
dc.subject.keywords silver
dc.subject.keywords deposition
dc.subject.keywords surface properties
dc.subject.keywords islands
dc.subject.keywords roughness
dc.subject.keywords adsorbents
dc.subject.keywords diffusion
dc.subject.keywords scanning electron microscopy
dc.subject.keywords thin films
dc.title Smoluchowski ripening of Ag islands on Ag(100)
dc.type article
dc.type.genre article
dspace.entity.type Publication
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