Abstract
We hereby present the fabrication of simple and efficient humidity and ammonia sensors based on a chemiresistor design employing a differential measurement technique. Interdigitated electrodes are connected via PEDOT:PSS or P3HT polymers and a reproducible and scalable fabrication procedure is presented. This procedure utilizes pneumatic nozzle printing instead of drop or spin-based processes and includes an optimized encapsulation procedure and material for sealing the reference electrodes. The suitability of the NH3 sensor for quantifying ammonia in a range of 2 to 100 ppm within a period of several months is furthermore presented. The developed humidity sensor is operational for several months in a humidity range between 10 and 60% RH. Once this range is exceeded, a sensor decay by irreversible saturation can be observed. Based on the low fabrication costs of the sensors (~0.5 $ when ordering 1000 pcs of the platform + printing work), they provide a very attractive tool for industrial humidity and ammonia sensing applications.
Original language | English |
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Article number | e53733 |
Number of pages | 13 |
Journal | Journal of Applied Polymer Science |
Volume | 140 |
Issue number | 15 |
DOIs | |
Publication status | Published - 8 Feb 2023 |
Research Field
- Biosensor Technologies
Keywords
- ammonia
- chemiresistor
- gas sensing
- humidity
- pneumatic nozzle printing