Journal
IEEE SENSORS JOURNAL
Volume 19, Issue 3, Pages 833-837Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2018.2879826
Keywords
Sensor on paper; humidity sensing; poly(ionic liquid)s; in situ preparation; click chemistry
Funding
- Natural Science Foundation Committee [61773178]
- Projects of Science and Technology Development Plan of Jilin Province [20160520093JH]
- Scientific Research Planning Projects of the Jilin Provincial Education Department [JJKH20180156KJ]
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This paper describes a humidity sensor fabricated by cross-linking poly(ionic liquid)s (PILs) in the cellulose fibers of printing paper via an in situ photoinitiated thiol-ene click reaction. The resultant sensors inherit the strong hydrophilicity and high ionic conductivity of the cellulose and PILs, respectively, which are the most important factors for a highperformance impedance-type humidity sensor. The introduction of PILs improved the sensitivity, hysteresis, response speed, and stability of the paper-based devices. The optimal paper-based device sensitivity increased by a factor of 1.4 after adding PILs, and the response time decreased to 25 s, which is comparable to that of the best reported paper-based humidity sensors.
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