Scalable Photoactive NO <sub>2</sub> ‐Sensing Framework for Plant Health Monitoring
Conventional sensing platforms for plant health monitoring are often limited by high operating temperatures, rigid substrates, and poor compatibility with ambient, power-constrained, or biologically sensitive environments. These limitations hinder their integration into emerging platforms such as smart agriculture and plant-interfaced electronics, where mechanical flexibility, energy efficiency, and low thermal budgets are essential. This paper reports a scalable, thermally passive NO<sub>2</sub> sensor based on light-activated 3D TiO<sub>2</sub> nanoarchitectures. Fabricated via sequential glancing angle deposition, the highly ordered porous nanoarchitectures exhibit tunable broadband light scattering and defect-mediated sub-bandgap activation under ambient light. Integrated with a wireless microcontroller and mobile application, the sensor enables autonomous NO<sub>2</sub> monitoring in real-world conditions. Field deployment on Mentha suaveolens plants demonstrates real-time tracking of gas-induced physiological stress, establishing practical ecological relevance. This platform overcomes the key limitations of conventional sensors, offering a structurally tunable, spectrally adaptive, and fabrication-scalable solution for light-powered, bio-integrated environmental monitoring.
Authors
- Jun Yeon Hwang (ORCID: https://orcid.org/0000-0002-2296-974X)
- Zion Park
- Hyeongyu Gim
- Jinho Lee (ORCID: https://orcid.org/0000-0001-5108-8733)
- Donghwi Cho (ORCID: https://orcid.org/0000-0001-9382-3820)
- Kootak Hong (ORCID: https://orcid.org/0000-0001-7402-5356)
- Jung Hwan Seo (ORCID: https://orcid.org/0000-0002-9567-3085)
- Jun Min Suh (ORCID: https://orcid.org/0000-0001-8506-0739)
- Gyu‐Li Kim
- Young‐Seok Shim (ORCID: https://orcid.org/0000-0002-1807-3932)
- Hyojung Kim (ORCID: https://orcid.org/0009-0002-7120-2243)
- Sunwoo Lee (ORCID: https://orcid.org/0009-0003-3674-6330)
- Changui Ahn (ORCID: https://orcid.org/0009-0008-3249-542X)
- Chil‐Hyoung Lee
- Jeong‐O Lee (ORCID: https://orcid.org/0000-0002-7343-4892)
- Sang‐Hyeon Nam (ORCID: https://orcid.org/0000-0002-1584-296X)
- Kwangjae Lee (ORCID: https://orcid.org/0000-0003-2832-6347)
- Dongsu Kim (ORCID: https://orcid.org/0000-0003-0849-7616)
- Jae Hyun Han (ORCID: https://orcid.org/0009-0007-7230-6008)
- Yun‐Haeng Cho
- S. T. Ro
- Jae Han Chung (ORCID: https://orcid.org/0009-0000-1854-8419)
Institutions
- Chonnam National University (KR)
- Corning (United States) (US)
- Seoul National University (KR)
- Sangmyung University (KR)
- Korea Advanced Institute of Science and Technology (KR)
- Dow Chemical (Japan) (JP)
- Sejong University (KR)
- Korea University of Technology and Education (KR)
- Korea Institute of Ceramic Engineering and Technology (KR)
- Korea Research Institute of Chemical Technology (KR)
- Korea Institute of Science and Technology (KR)
- Massachusetts Institute of Technology (US)
- Korea University of Science and Technology (KR)
- Korea Institute of Industrial Technology (KR)
- Hongik University (KR)
Publication Details
- Journal
- Advanced Science
- Published
- 2025-11-06
- DOI
- https://doi.org/10.1002/advs.202518368
- Citations
- 1
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.73