Paper-Based Wearable Ammonia Gas Sensor Using Organic–Inorganic Composite PEDOT:PSS with Iron(III) Compounds

Hajime Fujita, Meiting Hao, Shinji Takeoka, Yuji Miyahara, Tatsuro Goda, Toshinori Fujie*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Paper electronics are expected to be a game-changer in next-generation flexible electronics that could replace conventional plastic electronics. Paper electronics are disposable and cost-effective, two distinct advantages for the development of broadly accessible devices, but their poor performance has limited their practical implementation so far. Here, a high-sensitivity, high-performance, paper-based, wearable ammonia sensor comprising composite poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and iron(III) compounds is reported. The sensor achieves 10-times smaller size than the conventional sensor on Kapton film and high tolerance for humidity without losing practical sensor response. The utility of the device is demonstrated for wearable ammonia sensing in a facial mask and a nasal filter; wireless monitoring of food spoilage; and wireless monitoring of the ammonia level in a diaper. The approach of this study may open the door to advanced healthcare based on ubiquitous wearable sensing.

Original languageEnglish
Article number2101486
JournalAdvanced Materials Technologies
Issue number8
Publication statusPublished - 2022 Aug


  • LED sensor
  • amperometry
  • humidity tolerance
  • inkjet printing

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering


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