Phase transition driven discontinuity in thermodynamic size selection

R. van Gastel, D. Kaminski, E. Vlieg, B. Poelsema

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5 Citations (Scopus)
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Abstract

We show how an order-disorder phase transition in a two-dimensional system can discontinuously alter the shape and size of stress-stabilized self-assembled nanostructures. Low energy electron microscopy was used to study the dealloying of the Cu(111)-√3×√3-R30°-Bi surface alloy. The gradual expulsion of embedded bismuth from the alloy with increasing temperature induces a hard-hexagon-type order-disorder transition in the surface alloy. Our low energy electron microscopy results demonstrate how the loss of long-range order induces enormous changes in the domain patterns that the alloy forms with a Bi overlayer phase. We propose that the occurrence of phase transitions in one of the two surface phases that constitute a self-assembled domain pattern, provides a general, largely unexplored, mechanism that can be used to influence the morphological details of two-dimensional nanostructures
Original languageEnglish
Article number195501
Number of pages5
JournalPhysical review letters
Volume109
Issue number19
DOIs
Publication statusPublished - 2012

Keywords

  • IR-84700
  • METIS-288997
  • Optics (see also 3311)Solid state physics (see also 2307)Niet in een andere rubriek onder te brengen

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