Laser-induced short- and long-range orderings of Co nanoparticles on SiO 2

C. Favazza, J. Trice, H. Krishna, R. Kalyanaraman, Radhakrishna Sureshkumar

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Abstract

Laser irradiation of ultrathin Co films leads to pattern formation by dewetting with short-range order (SRO) as well as long-range order (LRO). When a 1.5 nm thick Co film is irradiated by a single laser beam, a monomodal size distribution of particles with average diameter of 31±10 nm and nearest-neighbor spacing of 75 nm is observed. Moreover, melting by two-beam interference irradiation produces LRO as well as SRO giving a quasi-two-dimensional arrangement of nanoparticles. The SRO is attributed to spinodal dewetting while the LRO is conjectured to be induced by in-plane interfacial tension gradients. Laser-induced dewetting of metals could be a simple technique to fabricate ordered metal nanoarrays.

Original languageEnglish (US)
Article number153118
JournalApplied Physics Letters
Volume88
Issue number15
DOIs
StatePublished - Apr 10 2006
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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