期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 6, 页码 6483-6490出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b18904
关键词
polyelectrolyte humidity sensors; in situ preparation; click reaction; ultrafast response; breath monitoring
资金
- National Natural Science Foundation of China [61773178]
- Jilin Provincial Science and Technology Development Planning Project [20160520093JH]
- Scientific Research Planning Projects of Jilin Provincial Education Department [JJKH20180156KJ]
Respiration monitoring is important for evaluating human health. Humidity sensing is a promising way to establish a relationship between human respiration and electrical signal. This work describes polymer humidity sensors with ultrafast response for respiration monitoring. The humidity-sensitive polyelectrolyte is in situ cross-linked on the substrate printed with interdigitated electrodes by a thiol ene click reaction. The polyelectrolyte humidity sensor shows rapid water adsorption/desorption ability, excellent stability, and repeatability. The sensor with ultrafast response and recovery (0.29/0.47 s) when changing humidity between 33 and 95% shows good application prospects in breath monitoring and touchless sensing. Different respiration patterns can be distinguished, and the breath rate/depth of detection subjects can also be determined by the sensor. In addition, the obtained sensor can sense the skin evaporation in a noncontact way.
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