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

• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 이크발 샤자드(Shahzad Iqbal) 시예드 아딜 살다르(Syed Adil Sardar) 아시프 알리(Asif Ali) 엄두승(Doo-Seung Um) 김우영(Woo Young Kim)
• 간행물 정보: 『한국응용과학기술학회지』제42권 제2호, 161~171쪽, 전체 11쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2025.04.30

국문 초록

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.

영문 초록

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

목차

1. Introduction

2. Research method

3. Results and Discussion

4. Conclusion

Acknowledgement

References

키워드

금속-유기골격 그린 합성 습도센서 정전용량 감지 metal-organic frameworks (MOFs) green synthesis humidity sensor capacitive sensing