A New Quartz Crystal Microbalance Measuring Method with Expansive Frequency Range and Broadband Adaptive Response Capacity / 分析化学
Chinese Journal of Analytical Chemistry
;
(12): 773-778, 2014.
Article
in Chinese
| WPRIM
| ID: wpr-446349
ABSTRACT
In order to solve the problems of present quartz crystal microbalance ( QCM ) measuring instruments, such as high demand for crystal cutting technology and uncomprehensive measurements for crystal parameters, a modified quadrature demodulation-based method was proposed with broadband adaptive response capacity and high frequency resolution. Moreover, it is also capable of measuring both resonant frequencies and dissipation factor D synchronously and continuously. Experimental results at room temperature indicated that the adaptive frequency range was 1-9 MHz while the frequency resolution was less than 1 Hz, measured resonance frequency shifts of crystals in the range scale linearly with the equal thickness increments of poly acrylic acid ( PAA) membrane on the working electrode, and with the volatilization of different solvent factor D is measured continuously and effectively along the time axis. To sum up, compared with traditional ones, this new method has lower material cost and more obtained parameters.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Analytical Chemistry
Year:
2014
Type:
Article
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