By monitoring the thermal noise of a vertically oriented micromechanical force sensor, we detect the viscoelastic response to shear for water in a subnanometer confinement. Measurements in pure water as well as under acidic and high-ionic-strength conditions relate this response to the effect of surface-adsorbed cations, which, because of their hydration, act as pinning centers restricting the mobility of the confined water molecules.
Ulcinas A., Valdre G., Snitka V., Miles M.J., Claesson P.M., Antognozzi M. (2011). Shear response of nanoconfined water on muscovite mica: role of cations. LANGMUIR, 27(17), 10351-10355 [10.1021/la2021897].
Shear response of nanoconfined water on muscovite mica: role of cations
VALDRE', GIOVANNI;
2011
Abstract
By monitoring the thermal noise of a vertically oriented micromechanical force sensor, we detect the viscoelastic response to shear for water in a subnanometer confinement. Measurements in pure water as well as under acidic and high-ionic-strength conditions relate this response to the effect of surface-adsorbed cations, which, because of their hydration, act as pinning centers restricting the mobility of the confined water molecules.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
