Hydrogel-incorporated colorimetric sensors with high humidity tolerance for environmental gases sensing

Jingjing Yu, Francis Tsow, Sabrina Jimena Mora, Vishal Varun Tipparaju, Xiaojun Xian

Research output: Contribution to journalArticlepeer-review

Abstract

Humidity interferes most gas sensors, especially colorimetric sensors. The conventional approaches to minimize the humidity interference in colorimetric gas sensing require using extra components, causing unwanted analytes loss, or limiting the choices of sensing probes to only hydrophobic ones. To explore the possibility of minimizing the humidity interference in a hydrophilic colorimetric sensing system, we have developed a hydrogel-incorporated approach to buffer the humidity influence on the colorimetric gas sensing. The hydrogel-incorporated colorimetric sensors show not only high humidity tolerance but also the improved analytical performance. The accuracy and reliability of the hydrogel-incorporated colorimetric sensors have also been validated in field tests. This hydrogel-incorporated approach will open up an avenue to implement hydrophilic recipes into colorimetric gas sensors and extend the application of colorimetric sensors to humid gases detection.

Original languageEnglish (US)
Article number130404
JournalSensors and Actuators, B: Chemical
Volume345
DOIs
StatePublished - Oct 15 2021

Keywords

  • Colorimetric sensor
  • Environmental gases
  • Gas sensor
  • Humidity interference
  • Hydrogel

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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