Presentation Information
[9a-B12-7]Nonlinear Electrical Properties of Proton Conductive Liquid Crystalline Azobenzene Polymers for Photoresponsive Reservoir Materials
〇Shunnosuke Tanaka1, Yuya Ishizaki2, Shusaku Nagano1 (1.Grad. Sch. of Sci., Rikkyo Univ., 2.Fac. of Eng., Shinshu Univ.)
Keywords:
Liquid crystalline polymer,Proton conductivity,Neuromorphic Device
Proton-conductive liquid crystalline (LC) acrylamide copolymers, P(AzAAm-co-ATBS), with azobenzene (AzAAm) and sulfonic acid (ATBS) side chains were synthesized via free-radical copolymerization. P(AzAAm-co-ATBS) exhibited the thermotropic LC nature and formed heterosmectic lamellar structures in which each side chain phase-separated via polymer main chains. The in-plane proton conductivity and nonlinear responses in thin films were investigated using electrochemical impedance spectroscopy and time-domain voltage–time measurements under varying relative humidity and temperature conditions. Reversible changes in proton conductivity and nonlinear electrical characteristics were observed with sequential on/off switching of UV light irradiation under 90% RH and 60 ºC conditions. Reservoir performance of thin films was evaluated by waveform generation tasks using multi-electrode devices.