| Project/Area Number |
04555194
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
工業物理化学・複合材料
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
OYAMA Noboru Tokyo Univ.of Agri.and Tech., Faculty of Technolgy, Professor, 工学部, 教授 (40134845)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIMOTO Eiji Technical Center, Technical Manager, 取締役技師長
直井 勝彦 東京農工大学, 工学部, 講師 (70192664)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥17,100,000 (Direct Cost: ¥17,100,000)
Fiscal Year 1993: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1992: ¥12,100,000 (Direct Cost: ¥12,100,000)
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| Keywords | Quarts Crystal / Microbalance / Mass Change / Viscoelasticity / Impedance-Frequency / Network Analyzer / Oscillating / Mass Transfer |
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| Research Abstract |
Analytical techniques using the quartz crystal electrodes are most suitable for examining the electrode reaction dynamics. The techniques can be divided into active method and passive method. In the active method, which is known as quartz crystal microbalance(QCM) technique, a quartz crystal itself is made to oscillate spontaneously and an oscillation frequency is counted using a frequency counter. On the other hand, in the passive method, which we call quartz crystal impedance(QCI) method herein, ac voltage is applied to a quartz crystal and an impedance-frequency spectrum is obtained. In this research, the in situ measurement systems of the both methods have been established. From the piezoelectric admittance measurements, it was found that the electrical equivalent circuit parameters(i.e., resistance R, inductance L and capacitance C components) on electrode surfaces can be evaluated and mean the mass, viscoelasticity and/or mechanical stress changes of thin films on electrodes during the redox reactions. The measurement method of the equivalent circuit parameters and the series resonant frequency of the electrode-separated piezoelectric quartz crystal was also established. It was demonstrated that this device can be a powerful tool for detecting changes in liquid properties.
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