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Publisher DOI: 10.1016/j.snb.2017.04.025
Title: A nanoporous gold-polypyrrole hybrid nanomaterial for actuation
Language: English
Authors: Wang, Ke 
Stenner, Charlotte 
Weissmüller, Jörg 
Keywords: actuation;hybrid;nanoporous gold;polypyrrole
Issue Date: 6-Apr-2017
Publisher: Elsevier
Source: Sensors and Actuators B: Chemical (248): 622-629 (2017)
Journal or Series Name: Sensors and Actuators / B: Chemical 
Abstract (english): 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.
DOI: 10.15480/882.1689
ISSN: 0925-4005
Institute: Keramische Hochleistungswerkstoffe M-9 
Werkstoffphysik und -technologie M-22 
Type: (wissenschaftlicher) Artikel
Project: SFB 986: Teilprojekt B2 - Feste und leichte Hybridwerkstoffe auf Basis nanoporöser Metalle 
License: In Copyright In Copyright
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