Laser-induced dewetting nanomorphologies in single and bilayer metal films

Hare Krishna, Christopher Favazza, R. Sureshkumar, R. Kalyanaraman

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

1 Scopus citations

Abstract

Spatially ordered patterns result under ns laser-induced dewetting of nanoscopic metallic films like Co and Ag on inert substrates like SiO 2. In both cases, the observed ordering length scale is due to thin film hydrodynamic instability with spinodal-like character. However, the morphological pathway during dewetting is different for the two metals: occurring through development of bicontinuous structures in the case of Ag and by progression of cellular networks for Co. Dewetting in bilayer structures of Ag and Co on SiO2 show that the morphology evolution is dictated by the thicker of the two films in the bilayer structure. We applied linear stability analysis to predict the length scales in single and bilayer metal film. The experimental observations are in good agreement with theoretical predictions from the analysis. An important result was that the length scales for the bilayer film were significantly smaller than a single layer of the same thickness suggesting that further control of patterning length scales may be achieved through multilayer dewetting.

Original languageEnglish (US)
Title of host publicationSelf Assembly of Nanostructures Aided by Ion- or Photon-Beam Irradiation
Subtitle of host publicationFundamentals and Applications
Pages86-92
Number of pages7
StatePublished - Dec 1 2007
Externally publishedYes
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Dec 1 2006

Publication series

NameMaterials Research Society Symposium Proceedings
Volume960
ISSN (Print)0272-9172

Other

Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/27/0612/1/06

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Krishna, H., Favazza, C., Sureshkumar, R., & Kalyanaraman, R. (2007). Laser-induced dewetting nanomorphologies in single and bilayer metal films. In Self Assembly of Nanostructures Aided by Ion- or Photon-Beam Irradiation: Fundamentals and Applications (pp. 86-92). (Materials Research Society Symposium Proceedings; Vol. 960).