Song, Young Geun Jung, Inki Shin, Joonchul Shim, Young-Seok Kim, Gwang Su Ju, Byeong-Kwon Kang, Chong-Yun 2024-01-19T15:03:03Z 2024-01-19T15:03:03Z 2021-09-05 2021-04 0925-4005 https://pubs.kist.re.kr/handle/201004/117205 Semiconducting gas sensors that operated at room-temperature (around 25 degrees C) have been studied to monitor target gases. Furthermore, a self-powered gas sensor with no reliance on a battery or external power source was highly demanded to effectively reduce the power consumption and apply for practical environments. In this study, we designed the self-powered gas sensors by connecting ionic-activated semiconducting sensors, a promising candidate for room-temperature operation, with an oval-shaped piezoelectric generator, and light-emitting diode alarm. The effect of the divided voltage from the energy generator to the sensor on the sensing performance was analyzed. The self-powered sensor has an extremely low detection limit (4.32 ppb NO2) with rapid and constant recovery (6 s) regardless of the NO2 concentration. Additionally, the practical applicability was confirmed by the light-emitting diode alarms according to the NO2 concentration in the atmosphere. English ELSEVIER SCIENCE SA Ionic-activated semiconducting gas sensors operated by piezoelectric generators at room temperature Article 10.1016/j.snb.2021.129481 1 SENSORS AND ACTUATORS B-CHEMICAL, v.332 SENSORS AND ACTUATORS B-CHEMICAL 332 N scie scopus 000618773500003 2-s2.0-85099641792 Chemistry, Analytical Electrochemistry Instruments & Instrumentation Chemistry Electrochemistry Instruments & Instrumentation Article Self-Powered Gas sensor Room temperature Ionic-activated Piezoelectric generator NO2