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A nanoporous gold-polypyrrole hybrid nanomaterial for actuation
Citation Link: https://doi.org/10.15480/882.1689
Publikationstyp
Journal Article
Date Issued
2017-04-06
Sprache
English
Author(s)
TORE-DOI
Volume
248
Start Page
622
End Page
629
Citation
Sensors and Actuators B: Chemical (248): 622-629 (2017)
Publisher DOI
Scopus ID
Publisher
Elsevier
We discuss actuation with a hybrid nanomaterial that is made by electro-polymerizing pyrrole on the internal surfaces of dealloying-derived nanoporous gold and then letting aqueous electrolyte be imbibed in the remaining pore space. In this way, active polypyrrole films are contacted by two separate but individually contiguous conduction paths, providing efficient transport of ions in the electrolyte channels and of electrons in the metal skeleton. The metal skeleton also serves to enhance the mechanical behavior of the actuator. Actuation exploits the dimension changes of the polymer when ions are exchanged with the electrolyte in a pseudo-capacitive way, at potentials negative of the classic oxidation/reduction of polypyrrole. Our experiments with millimeter-size bulk samples indicate fast switching and substantially larger strain amplitude than nanoporous metal actuators.
Subjects
actuation
hybrid
nanoporous gold
polypyrrole
DDC Class
620: Ingenieurwissenschaften
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