Light-Activated ZnO Sensor for NO2 Detection at Room Temperature

Abstract

Nitrogen dioxide (NO2) is a pollutant gas that causes deterioration of the air quality. This work provides a promising approach to efficiently detecting NO2 at room temperature using a chemiresistive sensor based on a zinc oxide (ZnO) ink on top of an interdigitated electrode (IDE). We propose a high-performance and low-cost gas sensor composed of aluminum electrodes printed on a flexible substrate using thermal printing. Unlike other gas sensors, the ZnO-based sensor works under ambient conditions and artificial light from fluorescent lamps, with no need for a dedicated light source. Changes in the sensor resistance are measured for low concentrations of NO2 gas adsorbed on the ZnO surface, showing a linear increase in resistance when the concentration of NO2 increases from 0.1 to 1 ppm. The advantages of this sensor are high sensitivity, fast response time, full recovery, good selectivity, stability over time, low power consumption and low cost.

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BibTeX RIS

BibTeX

@article{estevez2026lightactivated,
  title = {{Light-Activated ZnO Sensor for NO2 Detection at Room Temperature}},
  author = {Ailyn Estévez and Joana Pimenta and Andoni Beriain and Noemí Pérez},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c04616},
  url = {https://pubs.acs.org/acsodf/article/11/41/62815/5444183/Light-Activated-ZnO-Sensor-for-NO2-Detection-at},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Light-Activated ZnO Sensor for NO2 Detection at Room Temperature
AU  - Ailyn Estévez
AU  - Joana Pimenta
AU  - Andoni Beriain
AU  - Noemí Pérez
PY  - 2026
DA  - 2026/10/03
JO  - ACS Omega
DO  - 10.1021/acsomega.6c04616
UR  - https://pubs.acs.org/acsodf/article/11/41/62815/5444183/Light-Activated-ZnO-Sensor-for-NO2-Detection-at
AB  - Nitrogen dioxide (NO2) is a pollutant gas that causes deterioration of the air quality. This work provides a promising approach to efficiently detecting NO2 at room temperature using a chemiresistive sensor based on a zinc oxide (ZnO) ink on top of an interdigitated electrode (IDE). We propose a high-performance and low-cost gas sensor composed of aluminum electrodes printed on a flexible substrate using thermal printing. Unlike other gas sensors, the ZnO-based sensor works under ambient conditions and artificial light from fluorescent lamps, with no need for a dedicated light source. Changes in the sensor resistance are measured for low concentrations of NO2 gas adsorbed on the ZnO surface, showing a linear increase in resistance when the concentration of NO2 increases from 0.1 to 1 ppm. The advantages of this sensor are high sensitivity, fast response time, full recovery, good selectivity, stability over time, low power consumption and low cost.
SN  - 2470-1343
ER  -

Abstract

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