Open AccessReview
Optical and Electronic NOx Sensors for Applications in Mechatronics
by
Cinzia Di Franco, Angela Elia, Vincenzo Spagnolo, Gaetano Scamarcio, Pietro Mario Lugarà, Eliana Ieva, Nicola Cioffi, Luisa Torsi, Giovanni Bruno, Maria Losurdo, Michael A. Garcia, Scott D. Wolter, April Brown and Mario Ricco
Cited by 26 | Viewed by 15568
Abstract
Current production and emerging NOx sensors based on optical and nanomaterials technologies are reviewed. In view of their potential applications in mechatronics, we compared the performance of: i) Quantum cascade lasers (QCL) based photoacoustic (PA) systems; ii) gold nanoparticles as catalytically active materials
[...] Read more.
Current production and emerging NOx sensors based on optical and nanomaterials technologies are reviewed. In view of their potential applications in mechatronics, we compared the performance of: i) Quantum cascade lasers (QCL) based photoacoustic (PA) systems; ii) gold nanoparticles as catalytically active materials in field-effect transistor (FET) sensors, and iii) functionalized III-V semiconductor based devices. QCL-based PA sensors for NOx show a detection limit in the sub part-per-million range and are characterized by high selectivity and compact set-up. Electrochemically synthesized gold-nanoparticle FET sensors are able to monitor NOx in a concentration range from 50 to 200 parts per million and are suitable for miniaturization. Porphyrin-functionalized III-V semiconductor materials can be used for the fabrication of a reliable NOx sensor platform characterized by high conductivity, corrosion resistance, and strong surface state coupling.
Full article
►▼
Show Figures