Journal article

Specific effects of divalent cation nitrates on the nanotribology of silica surfaces

Bogdan C Donose, Ivan U Vakarelski, Elena Taran, Hiroyuki Shinto, Ko Higashitani

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | AMER CHEMICAL SOC | Published : 2006

Abstract

Recent investigations have shown that hydrated layers of monovalent cations adsorbed on silica (Donose, B. C.; Vakarelski, I. U.; Higashitani, K. Silica surfaces lubrication by hydrated cations adsorption from electrolyte solutions. Langmuir 2005, 21, 1834) or mica (Raviv, U.; Klein, J. Fluidity of bound hydration layers. Science 2002, 297, 1540) surfaces can act as highly efficient boundary lubricants. Here, by using the lateral force microscopy (LFM) mode of atomic force microscopy (AFM), we extended these investigations to the case of divalent cations, measuring the frictional force between a completely hydrophilic silica particle and a silica wafer in Ba2+, Sr 2+, Ca2+, and Mg2+ nitrate ..

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