Electroactive carbon nanotube actuators: Soft-lithographic fabrication and electro-chemical modelling |
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Authors: | Alberto Mazzoldi Mario Tesconi Alessandro Tognetti Walter Rocchia Giovanni Vozzi Giovanni Pioggia Arti Ahluwalia Danilo De Rossi |
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Affiliation: | 1. Interdepartmental Research Center “E. Piaggio”, Faculty Of Engineering, University of Pisa, Pisa, Italy;2. NEST, IIT and Scuola Normale Superiore of Pisa, Piazza dei Cavalieri, 7, I-56126, Pisa, Italy |
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Abstract: | Carbon nanotube (NT) actuators were fabricated using the micromolding method. In order to prevent the nanotubes from aggregating, they were enclosed in a partially cross-linked polyvinylalcohol–polyallylamine matrix. A unimorph matrix bender in the form of a small multi-layered strip, 5 mm × 15 mm was fabricated. The resulting composite system: NT/PVA, solid polymer electrolyte and metal contact, was characterised using impedance analysis and cyclic voltammetry. Initial measurements on electro-mechanical transduction show a conversion efficiency of 0.2 μm/mV. An electrochemical model of the impedance of the system was then developed, with which the experimental results agree fairly well. |
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