新型宽频自适应石英晶体微天平测量方法  

A New Quartz Crystal Microbalance Measuring Method with Expansive Frequency Range and Broadband Adaptive Response Capacity

作　　者：周俊鹏[1] 包宇[2] 林青[1] 逄仁山 王连明[1] 牛利[2] 

机构地区：[1]东北师范大学应用电子技术研究所,长春130021 [2]中国科学院长春应用化学研究所现代分析技术工程实验室,长春130022

出　　处：《分析化学》2014年第5期773-778,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金科学仪器基础研究专项(No.21227008)资助~~

摘　　要：针对目前石英晶体微天平（ Quartz crystal microbalance,QCM）仪器所存在的对晶体切割工艺要求过高,测量参数不够全面等问题,在正交解调法的基础上,提出了一种在较宽频率范围内具有自适应功能,测量频率分辨率高,并且可同时连续获取谐振频率和耗散因子D的测试方法。实验表明：室温下,频率测量自适应范围在1~9 MHz且频率分辨率小于1 Hz；随着工作电极聚丙烯酸（ Poly acrylic acid,PAA）膜厚度的均匀叠加,测得范围内各晶体频率偏移呈线性变化；随着不同溶剂挥发,D因子测量结果在时间轴上连续有效。与传统方法相比,本方法具有耗材成本低,获取参数丰富等优点。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.

关 键 词：石英晶体微天平 宽频自适应 正交解调 耗散因子 

分 类 号：TH715.11[机械工程—测试计量技术及仪器]