Elucidating the role of the ionic liquid in the actuation behavior of thermo-responsive ionogels

A combination of atomic layer deposition and photolithography is applied to fabricate interdigitated electrodes of aluminum-doped zinc oxide embedded in polyethylene terephthalate substrates. Various designs with different gap to widths ratios are realized and important characteristics of the electrodes, including thickness, surface roughness, and electrical properties with different ZnO:Al 2 O 3 ratios are studied. Oxygen plasma is applied to etch the polyethylene terephthalate surface and to embed the electrodes, a methodology which is a breakthrough toward ultimately thin devices fabrication. Moreover, the influence of oxygen plasma on the electrical properties of aluminum-doped zinc oxide is analyzed in more detail. Electrochemical impedance spectroscopy studies of two different stimuli responsive ionogels are performed using the fabricated electrodes. The results show the suitability of the use of the fabricated electrodes to monitor changes in ion motion and morphology of stimuli responsive materials. These electrodes and the process of characterization of the ionogels presented could be implemented to monitor electrochemical changes in real applications such as protective coatings.

Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 55%

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AZO Embedded Interdigitated Electrodes for Monitoring Stimuli Responsive Materials

Gil-González

Chen

Akyazi

et al. 2018

“…The role of the ILs in the actuation behavior of thermoresponsive ion gels was evaluated using poly( N ‐isopropylacrylamide) as thermo‐responsive gels polymerized in the presence of two ionic liquids: ethyl‐3‐methylimidazolium ethyl sulfate ([EMIM][ESO 4 ]) or trihexyltetradecyl‐phosphonium dicyanamide ([P66614][DCA]). [ 34 ] It was observed that the ion gel with [EMIM][ESO 4 ] requires less time to absorb and release water, being excellent for fast response applications. On the other hand, the [P66614][DCA] IL presents a more robust actuator behavior and a significant potential for long‐term applications due to its stable response.…”

Section: Ionic Liquid‐based Polymer Composites and Their Applicationsmentioning

confidence: 99%

“…On the other hand, the [P66614][DCA] IL presents a more robust actuator behavior and a significant potential for long‐term applications due to its stable response. [ 34 ]…”

Section: Ionic Liquid‐based Polymer Composites and Their Applicationsmentioning

confidence: 99%

Ionic Liquid–Polymer Composites: A New Platform for Multifunctional Applications

Correia

Fernandes

Martins

et al. 2020

223

201

Ionic liquids (ILs) have emerged as a novel class of chemical compounds for the development of advanced (multi)functional materials with outstanding potential in applications of several areas due to their unique properties and functionalities. The combination of ILs with polymers, in a composite, allows for developing smart materials, which synergistically combine the features of specific polymers and ILs. Moreover, ILs can be extensively modified by the incorporation of functional groups with specific properties into the cation, anion, or both. Thus, it is possible to tune the IL, the polymer, or both to obtain a broad spectrum of multifunctional composites and address the specific requirements of many applications. This work focusses on advanced materials and strategies concerning ILs and polymers for the development of smart IL/polymer‐based materials for applications including responsive and sensitive sensors, actuators, environment, batteries, fuel cells, and biomedical applications.

Ionic Liquid‐Based Stimuli‐Responsive Functional Materials

Cui

Chen

et al. 2020

Ionic liquids (ILs) have many attractive properties. For example, their physical and chemical properties can be tuned by a judicious design of the cations and anions, making them ideal candidates for designable building blocks of stimuli-responsive materials. Numerous IL-based stimuli-responsive materials have been developed by chemical modification (covalent, coordination, or ionic functionalization) or physical blending of ILs with other functional materials. The flexible tunability of ILs provides a great opportunity to achieve the desired physicochemical properties for taskspecific applications, such as sensing, display, gas capture, and so on. This review aims to address the recent advances in IL-based stimuli-responsive materials, which are categorized by the type of external stimuli, including gas-responsive, organic solvent-responsive, ion-responsive, pH-responsive, thermo-responsive, photo-responsive, and electro-responsive materials.