Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China.
Sensors (Basel). 2019 Mar 12;19(5):1253. doi: 10.3390/s19051253.
Lateral field excitation quartz crystal microbalance (LFE-QCM) can detect both the electrical properties (conductivity and permittivity) and mechanical properties (viscosity and density) of the liquid. In practical applications for detecting electrical properties, the viscosity and density of the liquid will also change. This research proposed a dual-channel LFE-QCM for reducing the influence of density and viscosity. The sensing layer of one resonant element is almost bare, and the other is covered by a metal film as a reference. Different organic solutions and NaCl solution were used to study the influence of mechanical properties and the temperature on electrical properties. The experimental results demonstrate that the dual-channel LFE-QCM is necessary for properly detecting electrical properties of the liquid.
横向场激励石英晶体微天平（LFE-QCM）可以同时检测液体的电学性质（电导率和介电常数）和力学性质（粘度和密度）。在检测电学性质的实际应用中，液体的粘度和密度也会发生变化。本研究提出了一种双通道 LFE-QCM 来减少密度和粘度的影响。一个共振元件的传感层几乎是裸露的，另一个则覆盖有金属膜作为参考。使用不同的有机溶剂和 NaCl 溶液研究了力学性质和温度对电学性质的影响。实验结果表明，双通道 LFE-QCM 对于正确检测液体的电学性质是必要的。
