About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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Presentation Title |
G-19: Surface Film-induced Reversible Electrochemical Actuation in Nanoporous Metals Investigated using In Situ Small- and Wide-angle X-ray Scattering. |
Author(s) |
Alexander Ng, Eric Detsi |
On-Site Speaker (Planned) |
Alexander Ng |
Abstract Scope |
Nanoporous metal actuators, also known as metallic muscles, are strong and stiff like conventional piezoelectric actuators. However, unlike piezoelectric actuators that usually operate at very high voltages (> 100 V), nanoporous metals actuators operate at less than 2 V. The actuation mechanism in nanoporous metals with high surface-to-volume ratios arise from changes in surface stress. The common way to change the surface stress of nanoporous metals is via capacitive and faradaic redox reactions at the metal/electrolyte interface. In this talk, I will show that electrochemically growing/stripping a film onto/from a nanoporous metal electrode in aqueous media results in reversible dimensional changes of the nanoporous metal. We will use small- and wide-angle x-ray scattering (SAXS, WAXS) to probe changes in the dimension (SAXS) and changes in the crystal structure of the materials (WAXS) in situ during film deposition/stripping. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Nanotechnology, Energy Conversion and Storage |