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Laser-induced patterning of Co nanostructures under ambient conditions

Published online by Cambridge University Press:  01 February 2011

C. Favazza ,
Justin Trice ,
Hare Krishna  and
Ramki Kalyanaraman
C. Favazza*
Affiliation:
cfavazza@physics.wustl.edu, Washington University, Physics, United States
Justin Trice
Affiliation:
jtrice@physics.wustl.edu, Washington University, Physics, United States
Hare Krishna
Affiliation:
harek@physics.wustl.edu, Washington University, Physics, United States
Ramki Kalyanaraman
Affiliation:
ramkik@wustl.edu, Washington University, Physics, United States
*
*Contact author at cfavazza@physics.wustl.edu
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Abstract

Increasing the efficiency and the relative ease of creating ordered nanostructures is essential to the advancement of nanotechnology. The practical benefits from ambient processing of nanostructures, like reduced complexity and increased efficiency, makes it an important avenue for investigation as nanomanufacturing processes. We have recently shown that pulsed laser melting of ultrathin metal films in vacuum leads to nanostructure ordering presumably due to metal dewetting. Here we show that UV pulsed laser irradiation (10 ns pulse width) of ultrathin Co films on SiO2 substrates under ambient conditions with a two-beam laser interference pattern generates Co nanoparticles with both long- and short-range order (LRO and SRO) and are qualitatively comparable to those created in vacuum. Furthermore, preferential etching of the metal shows that there is minimal interaction of the Co with the substrate. These results show that the presence of oxygen in the ambient does not substantially influence the resulting nanostructure formation. Therefore, ns pulsed laser processing under ambient conditions may be a practical way to realize ordered metal nanostructures.

Keywords

nanostructuremetallaser
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 890: Symposium Y – Surface Engineering for Manufacturing Applications , 2005 , 0890-Y04-06
Copyright
Copyright © Materials Research Society 2006

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References

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