Nanoporous au-pt alloys as large strain electrochemical actuators

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

doi:10.1021/nl903262b

Nanoporous au-pt alloys as large strain electrochemical actuators

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

Materials Characterization Lab

Research output: Contribution to journal › Article › peer-review

303 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 language	English (US)
Pages (from-to)	187-194
Number of pages	8
Journal	Nano letters
Volume	10
Issue number	1
DOIs	https://doi.org/10.1021/nl903262b
State	Published - Jan 13 2010

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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AU - Wang, Xiao Lan

AU - Parida, Smrutiranjan

AU - Wang, Ke

AU - Seo, Masahiro

AU - Weissmüller, Jörg

PY - 2010/1/13

Y1 - 2010/1/13

N2 - 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.

AB - 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.

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Nanoporous au-pt alloys as large strain electrochemical actuators

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