Nanoporous au-pt alloys as large strain electrochemical actuators

Hai Jun Jin, Xiao Lan Wang, Smrutiranjan Parida, Ke Wang, Masahiro Seo, Jörg Weissmüller

Research output: Contribution to journalArticlepeer-review

231 Scopus citations

Abstract

Nanoporous Au-Pt alloys with pore- and ligament size down to few nanometers were fabricated by dealloying Ag-Au-Pt. Owing to the small structure size and large specific surface area, the surface stress and its variation give rise to significant stress and strain in the bulk of these materials. In fact, dilatometry experiments find electrochemical actuation with large reversible strain amplitude. The linear strain reaches ∼1.3 % and strain energy density is up to 6.0 MJ/m3. The associated stresses may approach the elastic limit of the alloy.

Original languageEnglish (US)
Pages (from-to)187-194
Number of pages8
JournalNano letters
Volume10
Issue number1
DOIs
StatePublished - Jan 13 2010

All Science Journal Classification (ASJC) codes

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

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