Publications by authors named "Lennon Yao Ting Lee"
Article Synopsis
- Researchers improved CO gas sensors by increasing the doping concentration of Sc in ScAlN from 12% to 20% and reducing the gas channel size from 10 cm to 4 cm in length, significantly minimizing the sensor's overall volume.
- The newly developed 20% ScAlN-based pyroelectric detectors exhibit a higher pyroelectric coefficient and maintain an effective response time of about 5 seconds, detecting CO concentrations as low as 100 ppm, which is relevant for practical use given that the outdoor CO level averages around 400 ppm.
- Additionally, the sensors demonstrate strong selectivity against interference gases like nitrogen and sulfur hexafluoride, showing minimal signal changes, thereby indicating their reliability for CO detection in varied atmospheric conditions
Infrared gas sensors hold great promise in the internet of things and artificial intelligence. Making infrared light sources with miniaturized size, reliable and tunable emission is essential but remains challenging. Herein, we present the tailorability of radiant power and the emergence of new emission wavelength of microelectromechanical system (MEMS)-based thermal emitters with nickel oxide (NiO) films.
View Article and Find Full Text PDFInfrared gas sensors have been proven promising for broad applications in Internet of Things and Industrial Internet of Things. However, the lack of miniaturized light sources with good compatibility and tunable spectral features hinders their widespread utilization. Herein, a strategy is proposed to increase the radiated power from microelectromechanical-based thermal emitters by coating with graphene oxide (GO).
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