Solvation-Driven Electrochemical Actuation
- Solvation-Driven Electrochemical Actuation
- 차영수; Alain Boldini; Maurizio Porfiri
- Issue Date
- Physical review letters
- VOL 126, NO 4, 046001
- We demonstrate a novel principle of contactless actuation for ionic membranes in salt solution based on solvation. Actuation is driven by differential swelling of the sides of the membrane, due to comigrating
water in the solvation shells of mobile ions. We validate our theory through a series of experiments, which unravel a strong dependence of membrane deflection on the hydration numbers of mobile ions in the
external solution and membrane. Our study suggests a critical role of solvation in the chemoelectromechanics of natural and artificial selectively permeable membranes.
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