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Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface

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Electrically Switchable Molecular Adhesion via Self-Assembled Monolayer-Mediated Hydration and Ion Structuring.

Valentina Wieser¹, Yoyo Cheng-Ting Yu^2,3,4, Andrea Valencia Ramirez^1,5,6

¹Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.

Journal of the American Chemical Society

|November 7, 2025

Summary

Researchers demonstrated an electromechanical adhesion switch by controlling molecular surface modifications and potential. This work reveals how ion and hydration structuring impacts solid-solid interactions for tunable surface forces.

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Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

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Published on: April 19, 2021

Area of Science:

Surface Science
Colloid and Interface Science
Nanotechnology

Background:

Intermolecular and intersurface forces at solid-liquid interfaces are crucial for surface-mediated functions in biological and technological systems.
Ion and hydration structuring at interfaces are influenced by surface properties like potential, adsorbents, and electrolyte composition.
Understanding these interactions is key to controlling adhesion and repulsion.

Purpose of the Study:

To disclose an electromechanical adhesion switch mechanism.
To demonstrate the impact of molecular surface modification and potential modulation on adhesive and repulsive forces.
To analyze the role of ion ordering in shaping solid-solid interactions.

Main Methods:

Utilizing an electrochemical surface forces apparatus.
Performing molecular dynamics simulations.
Measuring intermolecular forces between mica and modified metal surfaces (mercaptobenzimidazole, cysteamine films).

Main Results:

Demonstrated an operational electromechanical adhesion switch.
Showcased the ability to tailor surface interactions via ion adsorption manipulation.
Provided a comprehensive analysis of forces and ion ordering under electrochemical modulation.

Conclusions:

Hydration and ion adsorption significantly influence solid-solid interactions involving organic thin films.
These interactions offer a flexible route for developing electromechanical adhesion switches.
The findings offer novel insights into controlling interfacial forces.