A nanoporous gold-polypyrrole hybrid nanomaterial for actuation

SENSORS AND ACTUATORS B-CHEMICAL

卷:248

Article

Wang, Ke¹  Stenner, Charlotte¹  Weissmller, Joerg^1,2 

[1] Hamburg Univ Technol, Inst Mat Phys & Technol, Hamburg, Germany

[2] Helmholtz Zentrum Geesthacht, Inst Mat Res, Mat Mech, Geesthacht, Germany

关键词: Actuation;    Hybrid;    Nanoporous gold;    Polypyrrole;   

DOI  :  10.1016/j.snb.2017.04.025

来源: Elsevier

【 摘 要 】

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. (C) 2017 The Authors. Published by Elsevier B.V.

【 授权许可】

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