Solvation-Driven Electrochemical Actuation

Alain Boldini; Youngsu Cha; Maurizio Porfiri

doi:10.1103/PhysRevLett.126.046001

Solvation-Driven Electrochemical Actuation

Alain Boldini, Youngsu Cha, Maurizio Porfiri

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Article number	046001
Journal	Physical Review Letters
Volume	126
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.126.046001
State	Published - Jan 27 2021

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.126.046001

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title = "Solvation-Driven Electrochemical Actuation",

abstract = "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.",

author = "Alain Boldini and Youngsu Cha and Maurizio Porfiri",

note = "Funding Information: The authors acknowledge financial support from the National Science Foundation under Grant No. OISE-1545857 and National Research Foundation of Korea (NRF) funded by the Korea government (MSIT) under Grant No. 2020R1A2C2005252. The authors are grateful to Roni Barak Ventura and Agnieszka Truszkowska for their help with experiments and useful discussion. Publisher Copyright: {\textcopyright} 2021 American Physical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Porfiri, Maurizio

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Y1 - 2021/1/27

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AB - 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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Solvation-Driven Electrochemical Actuation

Abstract

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