期刊
SENSORS
卷 18, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/s18030921
关键词
flexible humidity sensor; hydrophilic polytetrafluoroethylene (H-PTFE); real-time monitoring
资金
- Ministry of Trade, Industry, and Energy (MOTIE)
- Ministry of Trade, Industry, and Energy (MOTIF)
- Korea Evaluation Industrial Technology (KEIT) through the Industrial Strategic Technology Development Program [10079571, 10080348]
- GRRC program of Gyeonggi province (GRRC Sungkyunkwan) [2017-B06]
- Commercializations Promotion Agency for R&D Outcomes (COMPA) - Ministry of Science, ICT and Future Planning (MISP)
- Korea Evaluation Institute of Industrial Technology (KEIT) [10079571, 10080348] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Flexible sensors connected to cell phones are a promising technology that can aid in continuously monitoring signals in our daily lives, such as an individual's health status and information from buildings, farms, and industry. Among such signals, real-time humidity monitoring is crucial to a comfortable life, as human bodies, plants, and industrial environments require appropriate humidity to be maintained. We propose a hydrophilic polytetrafluoroethylene (H-PTFE)-based flexible humidity sensor integrated with readout circuitry, wireless communication, and a mobile battery. To enhance its sensitivity, linearity, and reliability, treatment with sodium hydroxide implements additional hydroxyl (OH) groups, which further enhance the sensitivity, create a strong linearity with respect to variations in relative humidity, and produce a relatively free hysteresis. Furthermore, to create robust mechanical stability, cyclic upward bending was performed for up to 3000 cycles. The overall electrical and mechanical results demonstrate that the flexible real-time H-PTFE humidity sensor system is suitable for applications such as wearable smart devices.
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