A New Quartz Crystal Microbalance Measuring Method with Expansive Frequency Range and Broadband Adaptive Response Capacity
10.3724/SP.J.1096.2014.40061
- VernacularTitle:新型宽频自适应石英晶体微天平测量方法
- Author:
Junpeng ZHOU
;
Yu BAO
;
Qing LIN
;
Renshan PANG
;
Lianming WANG
;
Li NIU
- Publication Type:Journal Article
- Keywords:
Quartz crystal microbalance;
Broadband adaptive;
Quadrature demodulation;
Dissipation factor
- From:
Chinese Journal of Analytical Chemistry
2014;(5):773-778
- CountryChina
- Language:Chinese
-
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.
