Self-organized metal nanostructures through laser-interference driven thermocapillary convection

C. Favazza, J. Trice, R. Kalyanaraman, R. Sureshkumar

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

Here the authors investigate self-organization and the ensuing length scales when Co films (1-8 nm thick) on Si O2 surfaces are repeatedly and rapidly melted by nonuniform (interference) laser irradiation. Pattern evolution produces periodic nanowires, which eventually breakup into nanoparticles exhibiting spatial order in the nearest-neighbor (NN) spacing λNN2. For films of thickness h0 >2 nm, λNN2 h0 12 while the particle radius varies as rp2 h0 12. This scaling behavior is consistent with pattern formation by a thermocapillary flow and a Rayleigh-like instability. For h0 ≤2 nm, a hydrodynamic instability of a spinodally unstable film leads to the formation of nanoparticles.

Original languageEnglish (US)
Article number043105
JournalApplied Physics Letters
Volume91
Issue number4
DOIs
StatePublished - Aug 3 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Self-organized metal nanostructures through laser-interference driven thermocapillary convection'. Together they form a unique fingerprint.

  • Cite this