Stiffness, strength, and ductility of nanoscale thin films and membranes: A combined wrinkling-cracking methodology

Jun Young Chung, Jung Hyun Lee, Kathryn L. Beers, Christopher M. Stafford

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

We establish and validate a measurement method based on wrinkling-cracking phenomena that allows unambiguous measurements of three fundamental mechanical properties in nanoscale thin film geometries, including elastic modulus, strength, and fracture strain. In addition to polymer and metal thin films, the method is applied to the active nanolayers of a composite reverse osmosis membrane before and after chlorination, illustrating the ability to detect a ductile-to-brittle transition in these materials indicative of "embrittlement", a behavior that impairs long-term durability and is detrimental to membrane performance.

Original languageEnglish
Pages (from-to)3361-3365
Number of pages5
JournalNano Letters
Volume11
Issue number8
DOIs
Publication statusPublished - 2011 Aug 10

Keywords

  • Mechanical properties
  • membranes
  • nanometrology
  • nanoscale materials
  • surface wrinkling
  • thin-film cracking

ASJC Scopus subject areas

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

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