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

摘要

The present work reports the new characteristics of the immersion-angledependence of the resonant-frequency shift ((DELTA)F) 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 X 10~(-2)g cm~(-2)(centre dot)s~(-1/2), the (DELTA)F values are dependent on the immersion angles in all solutions. However, we have found that the transition phenomenon of (DELTA)F occurs between 1.78 X 10~(-2) and 4.80 X 10~(-2)g(centre dot)cm~(-2)(centre dot)s~(-1/2) in the sucrose solution, between 1.75 X 10~(-2) and 4.34 X 10~(-2)g (centre dot)cm~(-2)(centre dot)s~(-1/2) in the glucose solution and between 1.83 X 10~(-2) and 3.03 X 10~(-2)g(centre dot)cm~(-2)(centre dot)s~(-1/2) in the glycerol solution, respectively. Moreover, above the concentrations of the end points of the transition phenomenon, the (DELTA)F values of the sucrose solution are equal to those of 90 deg at all immersion angles. On the other hand, those of the glucose and the glycerol solutions are the same as those of 30 deg. This difference may be caused by inherent characteristics of adsorption to the surface of the QCM electrode.