A Multi-Parameter Decoupling Method with a Lamb Wave Sensor for Improving the Selectivity of Label-Free Liquid Detection †

Sensors

Lianqun Zhou¹  Yihui Wu¹  Ming Xuan¹  Jean-François Manceau² 

[1] Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China; E-Mails:;Institute FEMTO-ST, CNRS, Université de Franche-Comté, Besançon 25044, France; E-Mails:

关键词: Lamb wave sensor;    density;    sound velocity;    viscosity;    determination of multi-parameters;   

DOI  :  10.3390/s120810369

来源: mdpi

【 摘 要 】

In this paper, a liquid multi-parameter decoupling method with only one Lamb wave sensor is presented. In a Lamb wave sensor, antisymmetric modes (A₀₁ mode for low frequency, A₀₃ mode for high frequency) and symmetric modes (S₀ mode) are used to detect multiple parameters of a liquid, such as its density, sound velocity, and viscosity. We found they can play very different roles in the detections. For example, the A₀₁ mode is very sensitive to the liquid's density but the A₀₃ mode is sensitive to the sound velocity. Here, the A₀ mode is used to identify the density of the detected liquid and with this density value we obtained the viscosity by the amplitude shifts of the S₀ mode. This could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of selectivity of label-free detection on biosensors.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.