Effects of substrate curvature on dealloying of nanoporous thin films

Wen Chung Li, T. John Balk

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.

Original languageEnglish
Pages (from-to)1125-1128
Number of pages4
JournalScripta Materialia
Issue number12
StatePublished - Dec 2009

Bibliographical note

Funding Information:
This material is based upon work supported by the National Science Foundation under Grant No. DMR-0847693 . Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund (Grant No. 43324-G10 ), for support of this research. T.J.B. thanks the National Center for Electron Microscopy for the NCEM Visiting Scientist Fellowship that allowed some of the SEM work to be carried out.


  • AuPd
  • Dealloying
  • Nanoporous
  • Substrate curvature

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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