Experimental study on Love-wave sensors with SiO2/LiTaO3 structures

2008 ◽  
Author(s):  
Feng-mei Zhou ◽  
Zhe Li ◽  
Tao Zhang ◽  
Wei Lin ◽  
Li Fan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Love Wave ◽  
Wave Sensors

Design and fabrication of Love-wave sensors: An experimental study

2011 ◽  
Author(s):  
D. Matatagui ◽  
J. Fontecha ◽  
M. J. Fernandez ◽  
M. C. Horrillo ◽  
I. Gracia ◽  
...  
Keyword(s):  
Experimental Study ◽  
Love Wave ◽  
Wave Sensors

scholarly journals Love Wave Sensors with Silver Modified Polypyrrole Nanoparticles for VOCs Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1432 ◽  
Author(s):  
Milena Šetka ◽  
Fabio A. Bahos ◽  
Daniel Matatagui ◽  
Isabel Gràcia ◽  
Eduard Figueras ◽  
...  
Keyword(s):  
Quality Control ◽  
Love Wave ◽  
Active Sites ◽  
Disease Diagnosis ◽  
Exhaled Breath ◽  
Limits Of Detection ◽  
Sensor Structure ◽  
Control Food ◽  
Polypyrrole Nanoparticles ◽  
Wave Sensors

Love wave sensors with silver-modified polypyrrole nanoparticles are developed in this work. These systems prove functional at room temperature with enhanced response, sensitivity and response time, as compared to other state-of-the-art surface acoustic wave (SAW) sensors, towards volatile organic compounds (VOCs). Results demonstrate the monitoring of hundreds of ppb of compounds such as acetone, ethanol and toluene with low estimated limits of detection (~3 ppb for acetone). These results are attributed to the use of silver-modified polypyrrole as a second guiding/sensitive layer in the Love wave sensor structure, which provides further chemically active sites for the gas-solid interactions. The sensing of low VOCs concentrations by micro sensing elements as those presented here could be beneficial in future systems for air quality control, food quality control or disease diagnosis via exhaled breath as the limits of detection obtained are within those required in these applications.

scholarly journals Love wave sensors based on gold nanoparticle-modified polypyrrole and their properties to ammonia and ethylene

2020 ◽  
Vol 304 ◽  
pp. 127337 ◽  
Author(s):  
M. Šetka ◽  
F.A. Bahos ◽  
D. Matatagui ◽  
M. Potoček ◽  
Z. Kral ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Love Wave ◽  
Wave Sensors

scholarly journals Monitoring bio-molecular vesicle interactions in liquid using Love-wave sensors

2009 ◽  
Vol 1 (1) ◽  
pp. 1075-1078
Author(s):  
V. Blondeau-Patissier ◽  
C. Elie-Caille ◽  
L. El Fissi ◽  
J.M. Friedt ◽  
S. Ballandras
Keyword(s):  
Love Wave ◽  
Wave Sensors

Finite element simulation of Love wave sensor for the detection of volatile organic gases

2021 ◽  
Author(s):  
Yan Wang ◽  
Su-Peng Liang ◽  
Shu-Lin Shang ◽  
Yong-Bing Xiao ◽  
Yu-Xin Yuan
Keyword(s):  
Finite Element ◽  
Love Wave ◽  
Gas Sensing ◽  
Resonance Effect ◽  
Acoustic Properties ◽  
Sensitive Material ◽  
Mass Sensitivity ◽  
Sensing Applications ◽  
Wave Sensors ◽  
Organic Gases

Abstract The 3D finite element (3D-FE) simulation and analysis of Love wave sensors based on PIB layers/SiO2/ST-90°X quartz structure, as well as the investigation of coupled resonance effect on the acoustic properties of the devices, are presented in this paper. The mass sensitivity of the basic Love wave device with SiO2 guiding layers solved analytically. And the highest mass sensitivity of 128 m2/kg is obtained as h s/λ =0.175. The sensitivity of the Love wave sensors for sensing VOCs is greatly improved due to the presence of coupled resonance induced by the PIB nanorods on the device surface. The frequency shifts of the sensor corresponding to CH2Cl2, CHCl3, CCl4, C2Cl4, CH3Cl and C2HCl3 with the concentration of 100 ppm are 1.431 kHz, 5.507 kHz, 13.437 kHz, 85.948 kHz, 0.127 kHz and 17.879 kHz, respectively. The viscoelasticity influence of sensitive material on the characteristics of SAW sensors is also studied. Taking account of the viscoelasticity of PIB layers, the sensitivities of SAW sensors with the PIB film and PIB nanorods decay in different degree. The gas sensing property of Love wave sensor with PIB nanorods is superior to that of the PIB films. Meanwhile, the Love wave sensors with PIB sensitive layers show good selectivity to C2Cl4, making it an ideal selection for gas sensing applications.

Love Wave Propagation in a Layered Piezoelectric Structure Immersed in a Viscous Fluid

2006 ◽  
Vol 306-308 ◽  
pp. 1211-1216 ◽  
Author(s):  
Fei Peng ◽  
Hua Rui Liu ◽  
S.Y. Hu
Keyword(s):  
Wave Propagation ◽  
Viscous Fluid ◽  
Love Wave ◽  
Mass Density ◽  
Transversely Isotropic ◽  
Love Waves ◽  
Perturbation Approach ◽  
Isotropic Layer ◽  
Piezoelectric Structure ◽  
Wave Sensors

This paper is addressed to the Love wave propagation in a layered piezoelectric structure immersed in a viscous fluid. The layered piezoelectric structure consists of an isotropic layer and a relatively thicker transversely isotropic piezoelectric substrate. The velocity of the Love waves changes due to the presence of the viscous fluid. The exact theory is accurate but not convenient to apply because it is generally difficult to get an explicit relation between the quantities we interest. In this paper, the perturbation approach is applied to obtain the explicit relations for the phase velocity and attenuation of Love waves. The result is useful for the measurement of the viscosity and mass density in Love wave sensors.

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