Ordered growth of nanocrystals via a morphological instability

J. J. Eggleston, P. W. Voorhees

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

Nanocrystal formation on patterned substrates during heteroepitaxy is studied. Deposition on a substrate with a mesa induces a qualitatively new morphological instability that is driven solely by capillarity. If the film possesses a lattice parameter misfit with the substrate, this instability then propagates as a traveling wave along the substrate. This traveling wave yields large regions of highly ordered nanocrystals. Strongly anisotropic surface energy greatly increases the growth rate of the instability of a planar film and, thus, decreases the distance over which the traveling wave propagates. Even in this case, however, deposition on a substrate with a periodic arrangement of mesas can yield highly ordered arrays of nanocrystals.

Original languageEnglish (US)
Pages (from-to)306-308
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number2
DOIs
StatePublished - Jan 14 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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