Interfacial Effects on Nanoscale Wrinkling in Gold-Covered Polystyrene

Craig T. Chapman, Jeffrey T. Paci, Won Kyu Lee, Clifford J. Engel, Teri W Odom, George C Schatz

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nanoscale wrinkling on the surfaces of polymer-based materials can be precisely controlled by depositing thin metal films of varying thicknesses. The deposition of these films fundamentally alters the mechanical properties of the substrates in ways that are not simply described using traditional continuum mechanical frameworks. In particular, we find, by modeling within a finite element analysis approach, that the very act of depositing a metal film may alter the Young's modulus of the polymer substrate to depths of up to a few hundred nanometers, creating a modified interfacial skin layer. We find that simulated wrinkle patterns reproduce the experimentally observed features only when the modulus of this surface layer varies by more than ∼500 nm and is described using a sigmoidal gradient multiplier.

Original languageEnglish
Pages (from-to)24339-24344
Number of pages6
JournalACS Applied Materials and Interfaces
Volume8
Issue number37
DOIs
Publication statusPublished - Sep 21 2016

Keywords

  • finite element simulations
  • interfaces
  • polystyrene
  • surfaces
  • thin films
  • wrinkles

ASJC Scopus subject areas

  • Materials Science(all)

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