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Article Dans Une Revue Sensors and Actuators B: Chemical Année : 2023

Behavior of conducting polymer-based micro-actuators under a DC voltage

Résumé

Conducting polymer-based micro-actuators are of great interest in soft MEMS as they exhibit large strains and forces in response to electrical stimulation. To date, these micro-actuators have very often been characterized by applying low frequency voltage to extract the electromechanical characteristics. However, many applications require maintaining the actuator’s position for several minutes. A micro-camera tracking the displacements of an object, the actuation of a cochlear implant during surgery, or closing micro-tweezers to manipulate objects are potential applications for which actuation is achieved by applying a direct current (DC) voltage. Knowledge of the behavior of micro-actuators under and after a DC voltage is crucial for modeling and future control. Consequently, the kinetics to reach the maximum strain followed by back-relaxation are identified. It is shown that it is the result of competition between an elastic restoring force and the backflow of the ions inside the actuator. A residual strain is observed after a short circuit and studied as a function of the DC voltage applied. It is demonstrated that the voltage and the chronology of the power-ups affect the actuator position and strain amplitude. The interpretation of the experimental results linked directly to the intrinsic operation of micro-actuators is presented.
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Dates et versions

hal-03951435 , version 1 (07-02-2023)

Identifiants

Citer

L. Seurre, H. Aréna, Sofiane Ghenna, Caroline Soyer, Sébastien Grondel, et al.. Behavior of conducting polymer-based micro-actuators under a DC voltage. Sensors and Actuators B: Chemical, 2023, 380, pp.133338. ⟨10.1016/j.snb.2023.133338⟩. ⟨hal-03951435⟩
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