Nanomanufacturing via fast laser-induced self-organization in thin metal films

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Robust nanomanufacturing methodologies are crucial towards realizing simple and cost-effective products. Here we discuss nanofabrication of ordered metal nanoparticles through pulsed-laser-induced self-organization. When ultrathin metal films are exposed to short laser pulses, spontaneous pattern formation results under appropriate conditions. Under uniform laser irradiation two competing modes of self-organization are observed. One, a thin film hydrodynamic dewetting instability due to the competition between surface tension and attractive van der Waals interactions, results in nanoparticles with well-defined and predictable interparticle spacings and sizes with short range spatial order. The second, thermocapillary flow due to interference between the incident beam and a scattered surface wave, results in laser induced periodic surface structures. Non-uniform laser irradiation, such as by 2-beam laser interference irradiation, initiates atunable thermocapillary effect in the film giving rise to nanowires, and continued laser irradiation leads to a Rayleigh-like breakup of the nanowires producing nanoparticles with spatial long-range and short-range order. These self-organizing approaches appear to be applicable to a variety of metal films, including Co, Cu, Ag, Fe, Ni, Pt, Zn, Ti, V and Mn. These results suggest that laser-induced self-organization in thin films could be an attractive route to nanomanufacture well-defined nanoparticle arrangements for applications in optical information processing, sensing and solar energy harvesting.

Original languageEnglish (US)
Title of host publicationInstrumentation, Metrology, and Standards for Nanomanufacturing
DOIs
StatePublished - Dec 1 2007
Externally publishedYes
EventInstrumentation, Metrology, and Standards for Nanomanufacturing - San Diego, CA, United States
Duration: Aug 29 2007Aug 30 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6648
ISSN (Print)0277-786X

Other

OtherInstrumentation, Metrology, and Standards for Nanomanufacturing
CountryUnited States
CitySan Diego, CA
Period8/29/078/30/07

Keywords

  • Laser
  • Metal
  • Nanostructure
  • Self-organization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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