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Austrian Model Shows Water Entropy Drives Lithium-Cesium Adsorption, Refutes Memory

5/19/2026

Summary

Story summary

Austrian researchers led by Markus Valtiner of TU Wien announced a model that predicts ion adsorption using electrostatic forces and water-structure entropy.
They imaged ion-water interfaces using atomic force microscopy.
Molecular dynamics simulations and spectroscopy revealed lithium forms hydration shells that lower entropy and reduce surface attachment.
The same methods showed cesium creates weaker water ordering, giving it higher entropy and a stronger tendency to bind surfaces, refuting water-memory claims.

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Story summary

Austrian researchers led by Markus Valtiner of TU Wien announced a model that predicts ion adsorption using electrostatic forces and water-structure entropy.
They imaged ion-water interfaces using atomic force microscopy.
Molecular dynamics simulations and spectroscopy revealed lithium forms hydration shells that lower entropy and reduce surface attachment.
The same methods showed cesium creates weaker water ordering, giving it higher entropy and a stronger tendency to bind surfaces, refuting water-memory claims.