Metal-organic frameworks (MOFs) are promising materials for next-generation gas sensing technologies. The implementation of MOFs into scalable gas sensor designs is, however, challenging due to high demands on the MOF film quality. Here, we report the highly sensitive detection of volatile organic compounds by transducing the gas adsorption in MOF thin films, prepared by chemical vapor deposition (MOF-CVD), into surface plasmon polariton shifts. Resonances as sharp as 14 nm, record-breaking shifts larger than 150 nm upon methanol uptake, and a limit of detection below 1 ppm are shown. These findings demonstrate the potential of MOF-CVD thin films for future gas sensing concepts.
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