Pencil-on-Paper Humidity Sensor Treated with NaCl Solution for Health Monitoring and Skin Characterization

Although flexible humidity sensors are essential for human health monitoring, it is still challenging to achieve high sensitivity and easy disposal with simple, low-cost fabrication processes. This study presents the design and fabrication of highly reliable hand-drawn interdigital electrodes from pencil-on-paper treated with NaCl solution for highly sensitive hydration sensors working over a wide range of relative humidity (RH) levels from 5.6% to 90%. The applications of the resulting flexible humidity sensor go beyond the monitoring of respiratory rate and proximity to characterizations of human skin types and evaluations of skin barrier functions through insensible sweat measurements. The sensor array can also be integrated with a diaper to result in smart diapers to alert for an early diaper change. The design and fabrication strategies presented in this work could also be leveraged for the development of wearable, self-powered, and recyclable sensors and actuators in the future.

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Work Title Pencil-on-Paper Humidity Sensor Treated with NaCl Solution for Health Monitoring and Skin Characterization
Access
Open Access
Creators
  1. Guangyu Niu
  2. Zihan Wang
  3. Ye Xue
  4. Jiayi Yan
  5. Ankan Dutta
  6. Xue Chen
  7. Ya Wang
  8. Chaosai Liu
  9. Shuaijie Du
  10. Langang Guo
  11. Peng Zhou
  12. Huanyu Cheng
  13. Li Yang
Keyword
  1. Flexible humidity sensors and sensing systems
  2. Pencil-on-paper
  3. Characterizations of skin types and barrier functions
  4. Monitoring of sensible and insensible sweat rate
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Nano Letters
Publication Date December 30, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1021/acs.nanolett.2c04384
Deposited January 29, 2024

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Work History

Version 1
published

  • Created
  • Added Revised_manuscript.docx
  • Added Creator Guangyu Niu
  • Added Creator Zihan Wang
  • Added Creator Ye Xue
  • Added Creator Jiayi Yan
  • Added Creator Ankan Dutta
  • Added Creator Xue Chen
  • Added Creator Ya Wang
  • Added Creator Chaosai Liu
  • Added Creator Shuaijie Du
  • Added Creator Langang Guo
  • Added Creator Peng Zhou
  • Added Creator Huanyu Cheng
  • Added Creator Li Yang
  • Published
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • Flexible humidity sensors and sensing systems, Pencil-on-paper, Characterizations of skin types and barrier functions, Monitoring of sensible and insensible sweat rate
    Publication Date
    • 2023-02-22
    • 2022-12-30
  • Updated