Laser-induced short- and long-range orderings of Co nanoparticles on SiO{sub 2}
- Department of Physics, Washington University in St. Louis, Missouri 63130 (United States) and Center for Materials Innovation, Washington University in St. Louis, Missouri 63130 (United States)
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.
- OSTI ID:
- 20778907
- Journal Information:
- Applied Physics Letters, Vol. 88, Issue 15; Other Information: DOI: 10.1063/1.2195113; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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