Multiscale, Hierarchical Patterning of Graphene by Conformal Wrinkling

Won Kyu Lee, Junmo Kang, Kan Sheng Chen, Clifford J. Engel, Woo Bin Jung, Dongjoon Rhee, Mark C Hersam, Teri W Odom

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

This paper describes how delamination-free, hierarchical patterning of graphene can be achieved on prestrained thermoplastic sheets by surface wrinkling. Conformal contact between graphene and the substrate during strain relief was maintained by the presence of a soft skin layer, resulting in the uniform patterning of three-dimensional wrinkles over large areas (>cm2). The graphene wrinkle wavelength was tuned from the microscale to the nanoscale by controlling the thickness of the skin layer with 1 nm accuracy to realize a degree of control not possible by crumpling, which relies on delamination. Hierarchical patterning of the skin layers with varying thicknesses enabled multiscale graphene wrinkles with predetermined orientations to be formed. Significantly, hierarchical graphene wrinkles exhibited tunable mechanical stiffness at the nanoscale without compromising the macroscale electrical conductivity.

Original languageEnglish
Pages (from-to)7121-7127
Number of pages7
JournalNano Letters
Volume16
Issue number11
DOIs
Publication statusPublished - Nov 9 2016

Keywords

  • conductive atomic force microscopy
  • Graphene
  • hierarchical patterning
  • polystyrene
  • texturing
  • wrinkles

ASJC Scopus subject areas

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

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