Mechanical Control of Graphene on Engineered Pyramidal Strain Arrays

Stephen T. Gill, John H. Hinnefeld, Shuze Zhu, William J. Swanson, Teng Li, Nadya Mason

Research output: Contribution to journalArticle

Abstract

Strain can tune desirable electronic behavior in graphene, but there has been limited progress in controlling strain in graphene devices. In this paper, we study the mechanical response of graphene on substrates patterned with arrays of mesoscale pyramids. Using atomic force microscopy, we demonstrate that the morphology of graphene can be controlled from conformal to suspended depending on the arrangement of pyramids and the aspect ratio of the array. Nonuniform strains in graphene suspended across pyramids are revealed by Raman spectroscopy and supported by atomistic modeling, which also indicates strong pseudomagnetic fields in the graphene. Our results suggest that incorporating mesoscale pyramids in graphene devices is a viable route to achieving strain-engineering of graphene.

Original languageEnglish (US)
Pages (from-to)5799-5806
Number of pages8
JournalACS Nano
Volume9
Issue number6
DOIs
StatePublished - Jun 23 2015

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Keywords

  • Raman spectroscopy
  • graphene
  • pseudomagnetic fields
  • strain
  • strain-engineering

ASJC Scopus subject areas

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

Cite this

Gill, S. T., Hinnefeld, J. H., Zhu, S., Swanson, W. J., Li, T., & Mason, N. (2015). Mechanical Control of Graphene on Engineered Pyramidal Strain Arrays. ACS Nano, 9(6), 5799-5806. https://doi.org/10.1021/acsnano.5b00335