A High-Q Quartz Crystal Microbalance with Mass Sensitivity up to 1017 Hz/kg

2019 ◽  
Vol 36 (12) ◽  
pp. 120702 ◽  
Author(s):  
Qiao Chen ◽  
Xian-He Huang ◽  
Wei Pan ◽  
Yao Yao
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Mass Sensitivity ◽  
High Q

Analysis and Improvement of the Mass Sensitivity for Piezoelectric Immunosensor

2013 ◽  
Vol 378 ◽  
pp. 435-439
Author(s):  
Yan Chen ◽  
Xian He Huang ◽  
Hua Shan Shi ◽  
Hong Chen
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Amplitude Equation ◽  
Maximum Mass ◽  
Vibration Displacement ◽  
Mass Sensitivity ◽  
Surface Electrodes ◽  
Sensitivity Distribution ◽  
Piezoelectric Immunosensor ◽  
Thickness Shear

The objective of this study was to improve the low repeatability in quartz crystal microbalance (QCM) measurements. The constitutive equations for the thickness-shear vibrations of an AT-cut quartz crystal with surface electrodes were used to obtain the particle vibration displacement amplitude equation. Then the mass sensitivity of piezoelectric immunosensor was analyzed and the approach to improve low repeatability was proposed. A 10MHz modified-electrode AT-cut QCM with a maximum mass sensitivity of was designed to verify uniform mass sensitivity distribution in the fully electrode region. Analysis results show that in order to improve the accuracy in QCM immunosensor measurements, it is feasible to improve its mass sensitivity.

scholarly journals Investigation on Mass Sensitivity of N-M Type Electrode Quartz Crystal Microbalance

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2125 ◽  
Author(s):  
Qiao Chen ◽  
Xianhe Huang ◽  
Wei Pan ◽  
Yuan Xu ◽  
Zhichao Fan
Keyword(s):  
Quantitative Analysis ◽  
Quartz Crystal Microbalance ◽  
Crucial Role ◽  
Quartz Crystal ◽  
Practical Application ◽  
Mass Sensitivity ◽  
Electrode Mass ◽  
Maximum Value ◽  
Quartz Crystal Microbalances ◽  
The Relationship

Mass sensitivity plays a crucial role in the practical application of quartz crystal microbalances (QCMs)-based quantitative analysis. n-m type QCMs have many applications, so it is necessary to clarify the relationship between the mass sensitivity and the electrode of the n-m type QCM. The performance of gold-plated films with different electrodes was studied by theoretical calculation and experiment. The results show that the mass sensitivity on the surface of the n electrode and the surface of the m electrode are essentially the same. Meanwhile, the mass sensitivity of n-m type QCMs varies with the diameter of the n and m electrodes. When the diameter of the n electrode is close to half the diameter of the m electrode, mass sensitivity is at maximum value. These results are important for the further designs and applications of n-m type QCMs.

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