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Surface-chemistry-driven actuation in nanoporous gold.
- Source :
-
Nature Materials . Jan2009, Vol. 8 Issue 1, p47-51. 5p. 1 Diagram, 2 Graphs. - Publication Year :
- 2009
-
Abstract
- Although actuation in biological systems is exclusively powered by chemical energy, this concept has not been realized in man-made actuator technologies, as these rely on generating heat or electricity first. Here, we demonstrate that surface-chemistry-driven actuation can be realized in high-surface-area materials such as nanoporous gold. For example, we achieve reversible strain amplitudes of the order of a few tenths of a per cent by alternating exposure of nanoporous Au to ozone and carbon monoxide. The effect can be explained by adsorbate-induced changes of the surface stress, and can be used to convert chemical energy directly into a mechanical response, thus opening the door to surface-chemistry-driven actuator and sensor technologies. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHEMISTRY
*ELECTRICITY
*GOLD
*CARBON monoxide
*DETECTORS
*SURFACE analysis
Subjects
Details
- Language :
- English
- ISSN :
- 14761122
- Volume :
- 8
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Nature Materials
- Publication Type :
- Academic Journal
- Accession number :
- 35775053
- Full Text :
- https://doi.org/10.1038/nmat2335