Jump to main content
Jump to site search


Fast-response ionogel humidity sensor for real-time monitoring of breathing rate

Abstract

Ionogel-based chemoresistive humidity sensors have been successfully fabricated through an ionothermal assembly of ionic liquids into the silica network. Our results demonstrated that the ionogel sensors with different types of anions (Br-, BF4-, and PF6-) exhibited good humidity sensitivity, low humidity hysteresis, and good reproducibility. In particular, the response and recovery times of SiO2/[Bmim]Br based sensor could reach 3 s and 10 s, respectively, which were considerably shorter than that of other types of SiO2-based humidity sensors. The improved sensitivity characteristics for SiO2/[Bmim]Br can be attributed to its high conductivity and hydrophility, resulting in fast ion transfer empolying Br- and H3O+ as charge carriers under humidity conditions. Moreover, this ionogel sensor also can confirm fast substantial impedance changes with the change in humidity for real-time monitoring human breath. It is highly expected that our findings would provide opportunities for design and fabrication of high-performance sensor for online monitoring humidity.

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Nov 2018, accepted on 03 Jan 2019 and first published on 09 Jan 2019


Article type: Research Article
DOI: 10.1039/C8QM00596F
Citation: Mater. Chem. Front., 2019, Accepted Manuscript
  •   Request permissions

    Fast-response ionogel humidity sensor for real-time monitoring of breathing rate

    S. Xiao, J. Nie, R. Tan, X. Duan, J. Ma, Q. Li and T. Wang, Mater. Chem. Front., 2019, Accepted Manuscript , DOI: 10.1039/C8QM00596F

Search articles by author

Spotlight

Advertisements