Steering liquid Pt-Si nanodroplets on Si(100) by interactions with surface steps

P. Sutter, Peter Bennett, J. I. Flege, E. Sutter

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Liquid eutectic Pt-Si droplets, migrating across a Si(100) surface due to an applied temperature gradient, interact measurably with surface steps. An analysis of the interaction yields a critical size of hundreds of nanometers below which droplets are constrained to move parallel to monolayer steps. Bunches of closely spaced steps are capable of guiding larger, micron-sized droplets. This steering by steps or step bunches may be used for the controlled manipulation of liquid droplets on patterned surfaces, and affects fundamental surface processes such as coarsening.

Original languageEnglish (US)
Article number125504
JournalPhysical Review Letters
Volume99
Issue number12
DOIs
StatePublished - Sep 20 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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