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Electrochemical characterization of ionogel actuators

Authors:
N. Gil González, T. Akyazi, E. Castaño Carmona, F. Benito López, M. C. Morant Miñana
Year:
2017
Communication in congress:
IEEE Explore: 11th Spanish Conference of Electron Devices
Volume:
8-10 February, 2017, Barcelona, Spain
Initial page - Ending page:
1 - 4
Description:

Ionogels (IOs) have been characterized by Electrochemical Impedance Spectroscopy (EIS) using gold interdigitated electrodes (Au-IDEs). Poly(N-isopropylacrylamide) (pNIPAAm) was photopolymerized in the presence of two ionic liquids (ILs), 1-ethyl-3-methylimidazolium ethyl sulfate [C2mIm][EtSO2] (1) or trihexyltetradecyl-phosphonium dicyanamide [P6,6,6,14][DCA] (2). The properties of the ILs are directly transferred to the IO and differences in Charge Transfer Resistance (Rct) were measured between the swelling and drying states. It was observed that IO-2 traps water molecules in a stronger way than IO-1, therefore its swollen state is more stable. Additionally, the resulting porosity was analyzed and related with their ability to accommodate water. These studies ensure a better understanding of the actuator behavior of the IOs.

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