| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Research Abstract |
In this project, my aim is the investigation of the mechanism of the immersion-angle dependence of the resonant frequency shift (AF) of the quartz crystal microbalance. For this aim, I have systematically investigated the immersion-angle dependence of AF in a Newtonian liquid and electrolytic solutions using the impedance analyze. Therefore, I prepared a Newtonian liquid using sucrose and electrolyte solutions using NaCl, KCl, NaNO_3, KNO_3 and CH_3COONa as monovalent electrolytes and MgCl_2, Na_2SO_4, MgO_4, CaCl_2 as divalent electrolytes. In electrolyte solutions, especially, I focused on the effect of the ionic valence and species for AF. As results, the following points have become clear.
1. Only when the x-z surface of the QCM is not parallel to the gravity direction, the immersion angle dependence of AF appears in a Newtonian liquid.
2. In all the electrolyte solutions, the AF values vary linearly with an increase in the square root of the density-viscosity product of the solutions, and the immersion angle dependence of AF appears. Moreover, it has become clear that the intercept values of AF dependent only on the cation species emerge and that the slope values of AF with the viscosity and density of the solutions are related only to the valence of ions. I have also found that the AF values are independent of anion species, conductivity and permittivity of the solutions.
The above results may indicate the fact that the immersion-angle dependence of AF is caused by the gravity acting on molecule and ion existing on the solid-liquid interface.
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