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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 4329–4339

Self assembled nanoparticle aggregates from line focused femtosecond laser ablation

Craig A. Zuhlke, Dennis R. Alexander, John C. Bruce, III, Natale J. Ianno, Chad A. Kamler, and Weiqing Yang  »View Author Affiliations

Optics Express, Vol. 18, Issue 5, pp. 4329-4339 (2010)

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In this paper we present the use of a line focused femtosecond laser beam that is rastered across a 2024 T3 aluminum surface to produce nanoparticles that self assemble into 5-60 micron diameter domed and in some cases sphere-shaped aggregate structures. Each time the laser is rastered over initial aggregates their diameter increases as new layers of nanoparticles self assemble on the surface. The aggregates are thus composed of layers of particles forming discrete layered shells inside of them. When micron size aggregates are removed, using an ultrasonic bath, rings are revealed that have been permanently formed in the sample surface. These rings appear underneath, and extend beyond the physical boundary of the aggregates. The surface is blackened by the formation of these structures and exhibits high light absorption.

© 2010 OSA

OCIS Codes
(240.6700) Optics at surfaces : Surfaces
(290.5850) Scattering : Scattering, particles
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Laser Micromachining

Original Manuscript: December 17, 2009
Revised Manuscript: January 25, 2010
Manuscript Accepted: February 2, 2010
Published: February 17, 2010

Craig A. Zuhlke, Dennis R. Alexander, John C. Bruce III, Natale J. Ianno, Chad A. Kamler, and Weiqing Yang, "Self assembled nanoparticle aggregates from line focused femtosecond laser ablation," Opt. Express 18, 4329-4339 (2010)

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