Abstract
A membrane-type surface stress sensor (MSS) featuring metal–organic framework nanoparticles shows rapid, discriminative and ppm-level responses to volatile organic compounds.
Highlights
Sensing of volatile organic compounds (VOCs) is critical to our perception of the environment around us,[1] monitoring of harmful emissions,[2] and healthcare analytics,[3] and so is required for a wide variety of current and future technologies.[4]
The irreversible signal—which we attribute to residual molecules that remain in the metal–organic frameworks (MOFs) pores on the timescale of these experiments—apparent in the rst Principal component analysis (PCA)
We have demonstrated for the rst time that MOF NPs as a receptor layer on the membrane-type surface stress sensor (MSS) platform can be highly effective for strain-based chemical sensing
Summary
Sensing of volatile organic compounds (VOCs) is critical to our perception of the environment around us,[1] monitoring of harmful emissions,[2] and healthcare analytics,[3] and so is required for a wide variety of current and future technologies.[4]. The perceived necessity for well-adhered and defect-free, oriented thin lms to effectively transmit analyte-induced strain to the sensor surface puts limits on the range of MOFs that can be used and introduces stringent, o en laborious requirements to MEMS device fabrication.[5,24] On the other hand, a much wider range of MOFs can be synthesized in colloidal or nanoparticular form.[26]
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