Intrinsically Breathable and Flexible NO2 Gas Sensors Produced by Laser Direct Writing of Self-Assembled Block Copolymers

The surge in air pollution and respiratory diseases across the globe has spurred significant interest in the development of flexible gas sensors prepared by low-cost and scalable fabrication methods. However, the limited breathability in the commonly used substrate materials reduces the exchange of air and moisture to result in irritation and a low level of comfort. This study presents the design and demonstration of a breathable, flexible, and highly sensitive NO2 gas sensor based on the silver (Ag)-decorated laser-induced graphene (LIG) foam. The scalable laser direct writing transforms the self-assembled block copolymer and resin mixture with different mass ratios into highly porous LIG with varying pore sizes. Decoration of Ag nanoparticles on the porous LIG further increases the specific surface area and conductivity to result in a highly sensitive and selective composite to detect nitrogen oxides. The as-fabricated Ag/LIG gas sensor on a flexible polyethylene substrate exhibits a large response of -12‰, a fast response/recovery of 40/291 s, and a low detection limit of a few parts per billion at room temperature. Integrating the Ag/LIG composite on diverse fabric substrates further results in breathable gas sensors and intelligent clothing, which allows permeation of air and moisture to provide long-term practical use with an improved level of comfort.

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Work Title Intrinsically Breathable and Flexible NO2 Gas Sensors Produced by Laser Direct Writing of Self-Assembled Block Copolymers
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Open Access
Creators
  1. Li Yang
  2. Huadong Ji
  3. Chuizhou Meng
  4. Yuhang Li
  5. Guanghao Zheng
  6. Xue Chen
  7. Guangyu Niu
  8. Jiayi Yan
  9. Ye Xue
  10. Shijie Guo
  11. Huanyu Cheng
Keyword
  1. Scalable laser direct writing
  2. Self-assembled BCP/resin
  3. Ag/LIG composites
  4. Intrinsically breathable and flexible gas sensors
  5. Intelligent clothing for gas sensing
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. ACS Applied Materials & Interfaces
Publication Date April 8, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1021/acsami.2c02061
Deposited July 19, 2022

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Work History

Version 1
published

  • Created
  • Added am-2022-020613.pdf
  • Added Creator Li Yang
  • Added Creator Huadong Ji
  • Added Creator Chuizhou Meng
  • Added Creator Yuhang Li
  • Added Creator Guanghao Zheng
  • Added Creator Xue Chen
  • Added Creator Guangyu Niu
  • Added Creator Jiayi Yan
  • Added Creator Ye Xue
  • Added Creator Shijie Guo
  • Added Creator Huanyu Cheng
  • Published
  • Updated Work Title, Keyword, Publisher, and 1 more Show Changes
    Work Title
    • Intrinsically Breathable and Flexible NO<sub>2</sub>Gas Sensors Produced by Laser Direct Writing of Self-Assembled Block Copolymers
    • Intrinsically Breathable and Flexible NO2 Gas Sensors Produced by Laser Direct Writing of Self-Assembled Block Copolymers
    Keyword
    • Scalable laser direct writing, Self-assembled BCP/resin, Ag/LIG composites, Intrinsically breathable and flexible gas sensors, Intelligent clothing for gas sensing
    Publisher
    • ACS applied materials &amp; interfaces
    • ACS Applied Materials &amp; Interfaces
    Publication Date
    • 2022-04-20
    • 2022-04-08
  • Updated