title: Shear response of nanoconfined water on muscovite mica: role of cations.
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.
authors.affiliation: Research Centre for Microsystems and Nanotechnologies, Kaunas University of Technology, LT-51369 Kaunas, Lithuania. aulcinas@gmail.com
authors.forename: Arturas
authors.initials: A
authors.lastname: Ulcinas
authors.forename: Giovanni
authors.initials: G
authors.lastname: Valdre
authors.forename: Valentinas
authors.initials: V
authors.lastname: Snitka
authors.forename: Mervyn J
authors.initials: MJ
authors.lastname: Miles
authors.forename: Per M
authors.initials: PM
authors.lastname: Claesson
authors.forename: Massimo
authors.initials: M
authors.lastname: Antognozzi
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D049329:Nanostructures / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D002412:Cations; D014867:Water; D012965:Sodium Chloride; C011934:mica