Graphene-based electronic textile sheet for highly sensitive detection of NO2 and NH3

Sang Won Lee, Hyo Gi Jung, Jae Won Jang, Dongsung Park, Dongtak Lee, Insu Kim, Yonghwan Kim, Da Yeon Cheong, Kyo Seon Hwang, Gyudo Lee, Dae Sung Yoon

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Graphene-based electronic textiles (e-textiles) have generally fabricated with one-dimensional (1D) textile (e.g., yarn) to serve as wearable devices or smart textiles for detecting hazardous gases. For an improved sensing performance, flexible 1D e-textile yarns can be woven and patterned to form two-dimensional (2D) sheets; however, these sheets suffer from batch-to-batch variations while manufacturing by hand. To address these issues, we fabricated a graphene-based electronic sheet (GES) on a polyester sheet with a uniform grid fishnet pattern. The 2D GES exhibited high conductance (∼7 μS) and sensitivity toward NO2 (0.34 μA/ppm) and NH3 (0.16 μA/ppm), which are indicative of a significantly improved performance as compared to that of the 1D e-textile yarn. Furthermore, the 2D GES not only exhibited an improved NO2 sensing response that was approximately three times higher than that of the 1D e-textile yarn but also showed other advantages, such as being 19 times lighter and 5 times thinner per unit area. Moreover, we confirmed that the GES enabled the detection of not only NO2, which is emitted from vehicle exhausts but also the NH3 present in the atmosphere and artificial breath. We also found that the GES possessed high mechanical flexibility to endure a 1,000-cycle bending test. These results suggest that the GES could be a next-generation 2D wearable gas sensor for detecting toxic environmental gases and monitoring health by exhalation.

Original languageEnglish
Article number130361
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2021 Oct 15

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) (No., NRF-2018M3C1B7020722 , NRF-2019R1A2B5B01070617 , NRF-2020R1A6A3A01096477 , and NRF-2020R1A2C2102262 ). This study was also supported by the BK21 FOUR (Fostering Outstanding Universities for Research) .

Publisher Copyright:
© 2021 Elsevier B.V.


  • Ammonia
  • Electronic textile sheet
  • Flexible gas sensor
  • Graphene
  • Nitrogen dioxide
  • Polyester sheet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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