Achieving finer pores and ligaments in nanoporous palladium-nickel thin films

W. C. Li, T. J. Balk

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Nanoporous palladium nickel (np-PdNi) was produced by dealloying PdNi alloy thin films. The pore and ligament dimensions were reduced by 50% when surfactants were added to the sulfuric acid etching solution. Changes in film composition and biaxial film stress were used to track the dealloying evolution in the surfactant-modified etching solution. Ultrasonic agitation was also used to enhance dealloying and shortened the required time from 5 h to 1 h, while retaining a pore/ligament size of ∼5 nm.

Original languageEnglish
Pages (from-to)167-169
Number of pages3
JournalScripta Materialia
Issue number3
StatePublished - Feb 2010

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.


  • Dealloying
  • Nanoporous
  • Palladium
  • Surfactant

ASJC Scopus subject areas

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


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