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Related Experiment Video

Updated: Jan 12, 2026

Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform
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Scalable Photoactive NO2-Sensing Framework for Plant Health Monitoring.

Yun-Haeng Cho1, Kootak Hong2, Jung Hwan Seo3

  • 1School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan, 31253, Republic of Korea.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 7, 2025
PubMed
Summary

Researchers developed a novel, thermally passive nitrogen dioxide (NO2) sensor using light-activated titanium dioxide (TiO2) nanoarchitectures. This flexible, energy-efficient sensor enables real-time plant health monitoring in smart agriculture and bio-integrated electronics.

Keywords:
3D nanoarchitecturesNO2 sensorsTiO2photoactivationplant monitoringroom temperaturewireless microcontrollers

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Area of Science:

  • Materials Science
  • Environmental Science
  • Sensor Technology

Background:

  • Conventional plant health sensors face limitations like high operating temperatures and rigidity.
  • These constraints impede integration into smart agriculture and bio-integrated electronics requiring flexibility and low power.

Purpose of the Study:

  • To report a scalable, thermally passive nitrogen dioxide (NO2) sensor.
  • To demonstrate its application in real-time plant physiological stress monitoring.

Main Methods:

  • Fabrication of 3D titanium dioxide (TiO2) nanoarchitectures using sequential glancing angle deposition.
  • Integration with a wireless microcontroller and mobile application for autonomous monitoring.
  • Field deployment on Mentha suaveolens plants for gas-induced stress tracking.

Main Results:

  • The nanoarchitectures exhibited tunable light scattering and defect-mediated sub-bandgap activation under ambient light.
  • Autonomous NO2 monitoring was achieved in real-world conditions.
  • Real-time tracking of gas-induced physiological stress in plants was demonstrated.

Conclusions:

  • The developed sensor overcomes limitations of conventional platforms, offering a tunable, spectrally adaptive, and scalable solution.
  • This light-powered, bio-integrated platform is suitable for environmental monitoring in smart agriculture and beyond.
  • The sensor provides practical ecological relevance for plant health assessment.