scholarly journals Portable Low-Cost Electronic Nose Based on Surface Acoustic Wave Sensors for the Detection of BTX Vapors in Air

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5406 ◽  
Author(s):  
Daniel Matatagui ◽  
Fabio Andrés Bahos ◽  
Isabel Gràcia ◽  
María del Carmen Horrillo
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Electronic Nose ◽  
Low Cost ◽  
Excellent Performance ◽  
Low Concentrations ◽  
Acoustic Wave Sensors ◽  
Benzene Toluene ◽  
Wave Sensors ◽  
First Time

A portable electronic nose based on surface acoustic wave (SAW) sensors is proposed in this work to detect toxic chemicals, which have a great potential to threaten the surrounding natural environment or adversely affect the health of people. We want to emphasize that ferrite nanoparticles, decorated (Au, Pt, Pd) and undecorated, have been used as sensitive coatings for the first time in these types of sensors. Furthermore, the proposed electronic nose incorporates signal conditioning and acquisition and transmission modules. The electronic nose was tested to low concentrations of benzene, toluene, and xylene, exhibiting excellent performance in terms of sensitivity, selectivity, and response time, indicating its potential as a monitoring system that can contribute to the detection of toxic compounds.

scholarly journals Fabrication of Low Cost Surface Acoustic Wave Sensors Using Direct Printing by Aerosol Inkjet

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 20907-20915 ◽  
Author(s):  
Marissa E. Morales-Rodriguez ◽  
Pooran C. Joshi ◽  
James R. Humphries ◽  
Peter L. Fuhr ◽  
Timothy J. Mcintyre
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Low Cost ◽  
Direct Printing ◽  
Acoustic Wave Sensors ◽  
Cost Surface ◽  
Wave Sensors

scholarly journals Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2367
Author(s):  
Benedict Scheiner ◽  
Florian Probst ◽  
Fabian Michler ◽  
Robert Weigel ◽  
Alexander Koelpin ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Phase Measurement ◽  
Low Cost ◽  
Harsh Environments ◽  
Contactless Measurement ◽  
Torque Measurements ◽  
Acoustic Wave Sensors ◽  
Wear And Tear ◽  
Wave Sensors

Due to higher automation and predictive maintenance, it becomes more and more important to acquire as many data as possible during industrial processes. However, many scenarios require remote sensing since either moving parts would result in wear and tear of cables or harsh environments prevent a wired connection. In the last few years, resonant surface acoustic wave (SAW) sensors have promised the possibility to be interrogable wirelessly which showed very good results in first studies. Therefore, the sensor’s resonance frequency shifts due to a changed measurand and thus has to be determined. However, up to now frequency reader systems showed several drawbacks like high costs or insufficient accuracy that blocked the way for a widespread usage of this approach in the mass market. Hence, this article presents a miniaturized and low cost six-port based frequency reader for SAW resonators in the 2.45 GHz ISM band that does not require an external calculation unit. It is shown that it can be either used to evaluate the scenario or measure the frequency directly with an amplitude or phase measurement, respectively. The performance of the system, including the hardware and embedded software, is finally shown by wired and contactless torque measurements.

Aluminum Nitride Thin Film Based Surface Acoustic Wave Sensors

2008 ◽  
Author(s):  
A. Kabulski ◽  
V. R. Pagán ◽  
D. Cortes ◽  
R. Burda ◽  
O. M. Mukdadi ◽  
...  
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Aluminum Nitride ◽  
Surface Acoustic Wave ◽  
Acoustic Wave Sensors ◽  
Wave Sensors

scholarly journals Surface Acoustic Wave Biosensor with Laser-Deposited Gold Layer Having Controlled Porosity

Chemosensors ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 173
Author(s):  
Dana Miu ◽  
Izabela Constantinoiu ◽  
Valentina Dinca ◽  
Cristian Viespe
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Gold Film ◽  
Good Control ◽  
Gold Layer ◽  
Porous Gold ◽  
Deposition Parameters ◽  
Acoustic Wave Sensors ◽  
Controlled Porosity ◽  
Wave Sensors

Laser-deposited gold immobilization layers having different porosities were incorporated into love wave surface acoustic wave sensors (LW-SAWs). Variation of pulsed laser deposition parameters allows good control of the gold film morphology. Biosensors with various gold film porosities were tested using the biotin–avidin reaction. Control of the Au layer morphology is important since the biotin and avidin layer morphologies closely follow that of the gold. The response of the sensors to biotin/avidin, which is a good indicator of biosensor performance, is improved when the gold layer has increased porosity. Given the sizes of the proteins, the laser-deposited porous gold interfaces have optimal pore dimensions to ensure protein stability.

Implications of Ergonomic and Environmental Factors in the Design of Surface Acoustic Wave Sensors

2003 ◽  
Author(s):  
Reginald Parker ◽  
Alisha M. Elmore ◽  
Zuri Farngalo ◽  
Deirdra R. Johnson ◽  
Louis V. Nelson ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Acoustic Wave Sensors ◽  
Wave Sensors

scholarly journals Surface acoustic wave devices for chemical sensing and microfluidics: a review and perspective

2017 ◽  
Vol 9 (28) ◽  
pp. 4112-4134 ◽  
Author(s):  
David B. Go ◽  
Massood Z. Atashbar ◽  
Zeinab Ramshani ◽  
Hsueh-Chia Chang
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Chemical Sensing ◽  
Chemical Detection ◽  
Microfluidic Platforms ◽  
Acoustic Wave Sensors ◽  
Acoustic Wave Devices ◽  
Wave Sensors

Surface acoustic wave sensors and microfluidic platforms enable effective chemical detection and sample manipulation.

Evaluation of an Equivalent Circuit Model for Simulation of Surface Acoustic Wave Sensors

2021 ◽  
Author(s):  
Raphael C. O. Jesus ◽  
Elyson A. N. Carvalho ◽  
Ollivier Tamarin ◽  
Raimundo C. S. Freire ◽  
Corinne Dejous
Keyword(s):  
Acoustic Wave ◽  
Equivalent Circuit ◽  
Surface Acoustic Wave ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Acoustic Wave Sensors ◽  
Wave Sensors

Response selectivity of etched surface acoustic wave sensors

1991 ◽  
Vol 248 (1) ◽  
pp. 143-153 ◽  
Author(s):  
Michael Thompson ◽  
David C. Stone ◽  
Rozalia Nisman
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Acoustic Wave Sensors ◽  
Wave Sensors ◽  
Etched Surface
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