scholarly journals Advances in Electromagnetic Piezoelectric Acoustic Sensor Technology for Biosensor-Based Detection

Chemosensors ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 58
Author(s):  
Gábor Mészáros ◽  
Sanaz Akbarzadeh ◽  
Brian De La Franier ◽  
Zsófia Keresztes ◽  
Michael Thompson
Keyword(s):  
Sensor Technology ◽  
Shear Mode ◽  
Biological Macromolecules ◽  
Analytical Sensitivity ◽  
Acoustic Sensor ◽  
Sensing Applications ◽  
Sensor Device ◽  
Acoustic Quality ◽  
Quartz Disc ◽  
Thickness Shear

The ultra-high frequency EMPAS (electromagnetic piezoelectric acoustic sensor) device is composed of an electrode-less quartz disc in which shear oscillation is induced by an AC-powered magnetic coil located 30 μm below the substrate. This configuration allows the instigation of high acoustic harmonics (in the region of 49th–53rd), with the resulting enhanced analytical sensitivity for biosensor purposes compared to the conventional thickness-shear mode device. In this paper, we introduce significant improvements to the operation of the system with respect to sensing applications. This includes a new interface program and the capability to measure the acoustic quality factor not available in the prototype version. The enhanced configuration is subject to testing through biosensor detection of surface adsorption of biological macromolecules, which include β-casein, and a gelsolin-actin complex.

FEM Simulation of Quartz Thickness Shear Mode Resonator for Gas Sensing Applications

2014 ◽  
Vol 605 ◽  
pp. 569-572
Author(s):  
Pavel Kulha ◽  
Igor Laposa ◽  
Alexandr Laposa ◽  
Miroslav Husák
Keyword(s):  
Finite Element ◽  
Shear Mode ◽  
Mems Devices ◽  
Sensitive Layer ◽  
Adsorption Effect ◽  
Selective Layer ◽  
Thickness Shear Mode ◽  
Sensing Applications ◽  
Simulation Results ◽  
Thickness Shear

The objective of this paper is to present simulation results of the Thickness Shear Mode (TSM) resonator based on quartz using finite element simulation method. 3D model of quartz resonator and simulations were completed using finite element method in CoventorWare software suite for design and simulation of MEMS devices. Different techniques for simulation of adsorption effect on selective layer were studied: influence of change in mass of the sensitive layer and influence of change in density of the sensitive layer. Analyses of resonant modes were performed for both cases and displacement profiles in selected modes were determined for the resonator under study. Impedance and phase characteristics were calculated and measured for clean sample and sample with selective layer coated. The adsorption model calculates the frequency shift in basic resonant frequency with adsorbed amount of sensed gas. The simulation results were used in design of gas sensors for dangerous substances detection.

Mimicking the olfactory system by a thickness-shear-mode acoustic sensor array

1996 ◽  
Vol 335 (1-2) ◽  
pp. 117-125 ◽  
Author(s):  
Zhong Cao ◽  
Dan Xu ◽  
Jian-Hui Jiang ◽  
Ji-Hong Wang ◽  
Hui-Gai Lin ◽  
...  
Keyword(s):  
Olfactory System ◽  
Sensor Array ◽  
Shear Mode ◽  
Acoustic Sensor ◽  
Thickness Shear Mode ◽  
Thickness Shear
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