Abstract
This work explores the use of ZIF-8, a metal-organic framework (MOF) material, for its use in the optical detection of volatile organic compounds (VOCs) in Fabry-Pérot and surface plasmon resonance (SPR)-based sensors. The experiments have been carried out with ethanol (EtOH) and show response times as low as 30 s under VOC-saturated atmospheres, and the estimated limit of detection is below 4000 ppm for both sensor types. The selectivity towards other VOCs is relatively poor, although the dynamics of adsorption/desorption differ for each VOC and could be used for selectivity purposes. Furthermore, the hydrophobicity of ZIF-8 has been confirmed and the fabricated sensors are insensitive to this compound, which is a very attractive result for its practical use in gas sensing devices.
Original language | English |
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Article number | 4381 |
Journal | Sensors |
Volume | 24 |
Issue number | 13 |
Number of pages | 13 |
ISSN | 1424-3210 |
DOIs | |
Publication status | Published - 2024 |
Keywords
- Gas ssensor
- MOFs
- ZIF-8
- Optical detection
- Fabry-Pérot interferometer
- Surface plasmon resonance
- VOCs
- Ethanol