Investigation of electrochemical actuation by polyaniline nanoﬁbers
Mehraeen, Shayan and Alkan Gürsel, Selmiye and Papila, Melih and Cebeci, Fevzi Çakmak (2017) Investigation of electrochemical actuation by polyaniline nanoﬁbers. Smart Materials and Structures, 26 (9). ISSN 0964-1726 (Print) 1361-665X (Online)
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Official URL: http://dx.doi.org/10.1088/1361-665X/aa7718
Polyaniline nanoﬁbers have shown promising electrical and electrochemical properties which make them prominent candidates in the development of smart systems employing sensors and actuators. Their electrochemical actuation potential is demonstrated in this study. A trilayer composite actuator based on polyaniline nanoﬁbers was designed and fabricated. Cross-linked polyvinyl alcohol was sandwiched between two polyaniline nanoﬁbrous electrodes as ion-containing electrolyte gel. First, electrochemical behavior of a single electrode was studied, showing reversible redox peak pairs in 1 M HCl using a cyclic voltammetry technique. High aspect ratio polyaniline nanoﬁbers create a porous network which facilitates ion diffusion and thus accelerates redox reactions. Bending displacement of the prepared trilayer actuator was then tested and reported under an AC potential stimulation as low as 0.5 V in a variety of frequencies from 50 to 1000 mHz, both inside 1 M HCl solution and in air. Decay of performance of the composite actuator in air is investigated and it is reported that tip displacement in a solution was stable and repeatable for 1000 s in all selected frequencies.
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