Ultrasensitive Humidity Sensor using Metal-Organic Framework Synthesized by Hydrothermal Reaction

본 연구는 습도센서에서 Zn-MOF (금속-유기구조)의 개발과 응용에 대해 다루며, 친환경적합성과 우수한 전기적 특성을 보고한다. 그린 화학의 원리를 이용하여 제작된 Zn-MOF를 유연한 폴리에틸렌테레프탈레이트 기판 상에 형성된 깍지낀 구조의 전극과 통합하였다. 상대습도가 10%부터 90%까지증가할 때, 전기적 특성은 42.49 pF에서 370 nF까지 정전용량의 급격한 상승(약 939,322%)을 나타냈다. 또한, 임피던스는 47 MΩ에서 0.072 MΩ까지 약 99.81% 감소하였다. 제작된 습도센서는 반응시간 5초, 복구시간 약 0.7에서 0.9초로 동적으로 반응하였다. 이러한 결과는 Zn-MOF가 고도로 민감하고 반응성이뛰어난 습도 모니터링할 수 있는 가능성과, 특히 다양한 환경 조건에서 센서의 정전용량성 반응성을 강조하고자 한다.

This research details the development and application of Zn-MOF (metal−organic frameworks) in humidity sensors, emphasizing eco-friendly synthesis methods and outstanding electrical performance. Employing principles of green chemistry, Zn-MOFs were crafted and integrated onto interdigitated electrodes set upon a flexible polyethylene terephthalate substrate. Electrical characterization highlighted a remarkable increase in capacitance, soaring from 42.49 pF to 370 nF— an approximate 939,322% rise—as relative humidity escalated from 10% to 90%. Additionally, impedance markedly decreased from 37 MΩ to 0.072 MΩ, a reduction of 99.81%. The sensors showcased exceptional dynamics, with both capacitance and impedance exhibiting rapid response and recovery times of 5 seconds and 0.7 to 0.9 seconds, respectively. These results emphasize the Zn-MOFs' capability for highly sensitive and responsive humidity monitoring, particularly highlighting the sensors' capacitive response under varying environmental conditions. This research details the development and application of Zn-MOF (metal−organic frameworks) in humidity sensors, emphasizing eco-friendly synthesis methods and outstanding electrical performance. Employing principles of green chemistry, Zn-MOFs were crafted and integrated onto interdigitated electrodes set upon a flexible polyethylene terephthalate substrate. Electrical characterization highlighted a remarkable increase in capacitance, soaring from 42.49 pF to 370 nF— an approximate 939,322% rise—as relative humidity escalated from 10% to 90%. Additionally, impedance markedly decreased from 37 MΩ to 0.072 MΩ, a reduction of 99.81%. The sensors showcased exceptional dynamics, with both capacitance and impedance exhibiting rapid response and recovery times of 5 seconds and 0.7 to 0.9 seconds, respectively. These results emphasize the Zn-MOFs' capability for highly sensitive and responsive humidity monitoring, particularly highlighting the sensors' capacitive response under varying environmental conditions