Soft Skin Layers Enable Area-Specific, Multiscale Graphene Wrinkles with Switchable Orientations

Dongjoon Rhee, Jeffrey T. Paci, Shikai Deng, Won Kyu Lee, George C. Schatz, Teri W. Odom

Research output: Contribution to journalArticle

Abstract

This paper reports a method to realize crack-free graphene wrinkles with variable spatial wavelengths and switchable orientations. Graphene supported on a thin fluoropolymer and prestrained elastomer substrate can exhibit conformal wrinkling after strain relief. The wrinkle orientation could be switched beyond the intrinsic fracture limit of graphene for hundreds of cycles of stretching and releasing without forming cracks. Mechanical modeling revealed that the fluoropolymer layer mediated the structural evolution of the graphene wrinkles without crack formation or delamination. Patterned fluoropolymer layers with different thicknesses produced wrinkles with controlled wavelengths and orientations while maintaining the mechanical integrity of graphene under high tensile strain.

Original languageEnglish
JournalACS nano
DOIs
Publication statusAccepted/In press - Jan 1 2019

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Keywords

  • graphene
  • mechanical modeling
  • plastic deformation
  • responsive patterns
  • wrinkles

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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