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Love Wave Sensors with Silver Modified Polypyrrole Nanoparticles for VOCs Monitoring

AuthorsŠetka, Milena; Bahos, Fabio A.; Matatagui, Daniel; Gràcia, Isabel; Figueras Costa, Eduard; Drbohlavová, Jana; Vallejos, Stella
Gas sensors
Love wave sensors
Volatile organic compounds
Issue Date2020
PublisherMultidisciplinary Digital Publishing Institute
CitationSensors 20(5): 1432 (2020)
AbstractLove 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.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/s20051432
Appears in Collections:(IMB-CNM) Artículos
(ITEFI) Artículos
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