Anisotropic, hierarchical surface patterns via surface wrinkling of nanopatterned polymer films

Jung Hyun Lee, Hyun Wook Ro, Rui Huang, Paul Lemaillet, Thomas A. Germer, Christopher L. Soles, Christopher M. Stafford

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

By combining surface wrinkling and nanopatterned polymer films, we create anisotropic, hierarchical surfaces whose larger length-scale (wrinkling wavelength) depends intimately on the geometry and orientation of the smaller length-scale (nanopattern). We systematically vary the pattern pitch, pattern height, and residual layer thickness to ascertain the dependence of the wrinkling wavelength on the nanopattern geometry. We apply a composite mechanics model to gain a quantitative understanding of the relationship between the geometric parameters and the anisotropy in wrinkling wavelength. Additionally, these results shed light on the effect of surface roughness, as represented by the nanopattern, on the metrology of thin films via surface wrinkling.

Original languageEnglish
Pages (from-to)5995-5999
Number of pages5
JournalNano Letters
Volume12
Issue number11
DOIs
Publication statusPublished - 2012 Nov 14

Keywords

  • Polymeric materials
  • hierarchical structures
  • metrology
  • nanostructures
  • patterning
  • thin films

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Lee, J. H., Ro, H. W., Huang, R., Lemaillet, P., Germer, T. A., Soles, C. L., & Stafford, C. M. (2012). Anisotropic, hierarchical surface patterns via surface wrinkling of nanopatterned polymer films. Nano Letters, 12(11), 5995-5999. https://doi.org/10.1021/nl303512d