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

C. Favazza; J. Trice; H. Krishna; R. Kalyanaraman; R. Sureshkumar

doi:10.1063/1.2195113

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

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

Research output: Contribution to journal › Article › peer-review

69 Scopus citations

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 language	English (US)
Article number	153118
Journal	Applied Physics Letters
Volume	88
Issue number	15
DOIs	https://doi.org/10.1063/1.2195113
State	Published - Apr 10 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2195113

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title = "Laser-induced short- and long-range orderings of Co nanoparticles on SiO 2 ",

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.",

author = "C. Favazza and J. Trice and H. Krishna and R. Kalyanaraman and R. Sureshkumar",

note = "Funding Information: One of the authors (R.K.) acknowledges support by the National Science Foundation through a CAREER Grant No. DMI-0449258 and to the center for materials innovation for student support. ",

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T1 - Laser-induced short- and long-range orderings of Co nanoparticles on SiO 2

AU - Favazza, C.

AU - Trice, J.

AU - Krishna, H.

AU - Kalyanaraman, R.

AU - Sureshkumar, R.

N1 - Funding Information: One of the authors (R.K.) acknowledges support by the National Science Foundation through a CAREER Grant No. DMI-0449258 and to the center for materials innovation for student support.

PY - 2006/4/10

Y1 - 2006/4/10

N2 - 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.

AB - 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.

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

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