The development of simple microcontroller-based QCM with some treatment on the crystal oscillator surface
The development of simple microcontroller-based QCM with some treatment on the crystal oscillator surface
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DOI：
10.1088/1742-6596/2376/1/012013
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
F. Faizal;Mochamad Irfan Maulana;I. Wuled Lenggoro;C. Panatarani;I. Made Joni
中科院分区：
文献类型：
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作者：
F. Faizal;Mochamad Irfan Maulana;I. Wuled Lenggoro;C. Panatarani;I. Made Joni
以单片机作为频率计数器嵌入式系统的基础，实现了低成本的石英晶体微天平(QCM)仪器。该系统使用来自晶体振荡器组件的石英晶体换能器。结合一些实验测试，对频移进行了观察和分析。进行了乙醇蒸发、湿箱内水蒸气、二氧化钛粒子包覆等实验。研制的QCM仪器已显示出测量频率的能力，以响应晶体振荡器表面质量的增加或减少。这些响应是由蒸发、潮湿条件和石英晶体表面沉积的颗粒引起的。QCM被改变为两个初始频率，即5 MHz和10 MHz。5 MHz系统代表了适当的“范围内”频率计数器，在微控制器高达5.6 MHz的计数限制内。另一方面，10 MHz是一个实验性的开发系统。这两种类型都使用了D触发器分频器，构成了一个基于微控制器的频率计数器，可以计算出极限频率的两倍。更稳定的10 MHz显示出与其他材料的表面相互作用有关的潜在应用前景，并且可以在其表面保持更厚的沉积，比低频对应的具有更好的稳定响应。
The low-cost quartz crystal microbalance (QCM) instrument with the microcontroller as the basis of the embedded system of the frequency counter was implemented. The system uses a quartz crystal transducer from the crystal oscillator component. The frequency shifting was observed and analysed in association with some experimental tests. The experiments such as ethanol evaporation, water vapor in the humidity chamber, and coating the surface with TiO2 particles had been conducted. The developed QCM instrument has shown the ability to measure the frequencies in response to the addition or reduction of mass on the surface of the crystal oscillator. These responses are caused by evaporation, humid condition, and deposited particle on the quartz crystal surface. The QCM was varied into two initial frequencies, 5 and 10 MHz. The 5 MHz system represents the proper “in range” frequency counters, inside a counting limit of the microcontroller up to 5.6 MHz. On the other side, the 10 MHz is an experimental development system. Both types utilise a D flip-flop frequency divider that made a microcontroller-based frequency counter and can count the frequency twice the limit. The more stable 10 MHz have shown promising potential application related to the surface interaction with other material and can hold thicker deposition on its surface with a better stability response than the lower frequency counterpart.