Plastic deformation drives wrinkling, saddling, and wedging of annular bilayer nanostructures

Jeong Hyun Cho, Dibakar Datta, Si Young Park, Vivek B. Shenoy, David H. Gracias

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


We describe the spontaneous wrinkling, saddling, and wedging of metallic, annular bilayer nanostructures driven by grain coalescence in one of the layers. Experiments revealed these different outcomes based on the dimensions of the annuli, and we find that the essential features are captured using finite element simulations of the plastic deformation in the metal bilayers. Our results show that the dimensions and nanomechanics associated with the plastic deformation of planar nanostructures can be important in forming complex three-dimensional nanostructures.

Original languageEnglish (US)
Pages (from-to)5098-5102
Number of pages5
JournalNano Letters
Issue number12
StatePublished - Dec 8 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


  • Self-assembly
  • buckling
  • lithography
  • nanomechanics
  • self-folding


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