Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 304, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.127337
Keywords
Gas sensors; SAW sensors; Polypyrrole
Funding
- Czech Science Foundation (GACR) [17-16531S]
- Spanish Ministry of Economy and Competitiveness [TEC2015-74329-JIN, TEC2016-79898-C6-1-R]
- Universidad Nacional Autonoma de Mexico [DGAPA-UNAM-PAPIIT TA100118]
- Internal Grant Agency (IGA) [STI-J-18-5559]
- MINECO
- MEYS
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This work presents the fabrication and gas sensing properties of Love wave sensors based on non-modified and gold nanoparticle-modified polypyrrole. Results demonstrate the integration of uniform polypyrrole layers with smooth granular surface and the incorporation of dispersed crystalline gold nanoparticles within the modified layers. Gas sensing tests of the sensors in dry conditions show enhanced sensing performance to ethylene and ammonia for the modified systems as compared to those without modification and those reported in the literature. The effect of humidity proves significant in both systems with the results showing a decrease of sensitivity in humid conditions. Despite this weakness, the relatively facile and scalable fabrication of these sensors, as well as their sensing response at room temperature may be attractive in gas detection systems, in which high humidity levels can be restricted by the use of filter or preconditioning elements.
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