Smoluchowski ripening of Ag islands on Ag(100) Thiel, Patricia Jenks, Cynthia Thiel, Patricia Cadilhe, A. Evans, James Evans, James
dc.contributor.department Ames National Laboratory
dc.contributor.department Mathematics
dc.contributor.department Chemistry 2018-02-13T12:55:48.000 2020-06-30T01:21:34Z 2020-06-30T01:21:34Z Fri Jan 01 00:00:00 UTC 1999 2013-06-27 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="" target="_blank">10.1063/1.479770</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1067
dc.identifier.contextkey 4263644
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/62
dc.language.iso en
dc.source.bitstream archive/|||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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