Journal article

Nonlinear friction characteristics between silica surfaces in high pH solution

Elena Taran, Yoichi Kanda, Ivan U Vakarelski, Ko Higashitani

Journal of Colloid and Interface Science | ACADEMIC PRESS INC ELSEVIER SCIENCE | Published : 2007

Abstract

Molecular-scale characteristics of friction forces between silica particles and silica wafers in aqueous solutions of the normal (pH 5.6) and high pH (pH 10.6) are investigated, using the lateral force measuring procedure of the atomic force microscope (AFM). Various significant differences of friction characteristics between solutions of normal and high pH's are found. In the case of solutions of normal pH, the friction force increases linearly with increasing loading force, as the Amonton's law for solid bodies indicates. However, in the case of high pH solutions, the increasing rate with the loading force is considerably reduced in the low loading region, but the value increases abruptly ..

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University of Melbourne Researchers