Immersion-Angle Dependence of the Resonant-Frequency Shift of a Quartz Crystal Microbalance in Three Types of Newtonian Liquids

Author： Yoshimoto Minoru

Publisher： Taylor & Francis Ltd

ISSN： 1568-5543

Source： Composite Interfaces, Vol.35, Iss.5, 2007-09, pp. : 495-505

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Abstract

The present work reports the new characteristics of the immersion-angle dependence of the resonant-frequency shift (ΔF) of the one-face sealed quartz crystal microbalance (QCM) in three types of Newtonian liquids, i.e., sucrose, glucose, and glycerol solutions. Below some 1.80×10-2 g cm-2 · s-1/2, the ΔF values are dependent on the immersion angles in all solutions. However, we have found that the transition phenomenon of ΔF occurs between 1.78×10-2 and 4.80×10-2 g · cm-2 · s-1/2 in the sucrose solution, between 1.75×10-2 and 4.34×10-2 g · cm-2 · s-1/2 in the glucose solution and between 1.83×10-2 and 3.03×10-2 g · cm-2 · s-1/2 in the glycerol solution, respectively. Moreover, above the concentrations of the end points of the transition phenomenon, the ΔF values of the sucrose solution are equal to those of 90° at all immersion angles. On the other hand, those of the glucose and the glycerol solutions are the same as those of 30°. This difference may be caused by inherent characteristics of adsorption to the surface of the QCM electrode.