Love Wave Sensors with Silver Modified Polypyrrole Nanoparticles for VOCs Monitoring

Sensors
Milena ŠetkaStella Vallejos

Abstract

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.

References

Nov 11, 2011·Journal of Breath Research·Agnieszka UlanowskaBogusław Buszewski
Mar 14, 2017·Sensors·Milena ŠetkaJaromír Hubálek
Apr 12, 2017·Sensors·Jagannath DevkotaDavid W Greve
Aug 22, 2017·Biosensors & Bioelectronics·Zhangliang Xu, Yong J Yuan
Jun 13, 2019·Scientific Reports·Milena ŠetkaStella Vallejos
Sep 5, 2019·Sensors·Shaobin FengHuansheng Ning

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Citations

Jun 4, 2020·Sensors·Vahid AmiriAhmad I Ayesh
Mar 5, 2021·Journal of Colloid and Interface Science·Chong WangGeyu Lu
Mar 7, 2021·Nanomaterials·Milena TomićStella Vallejos

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