On-chip monitoring of toxic gases: capture and label-free SERS detection with plasmonic mesoporous sorbents

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On-chip monitoring of toxic gases: capture and label-free SERS detection with plasmonic mesoporous sorbents

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  • 22/06/2023
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The evaluation of toxic gas molecules spread in air at low concentration on field requires a robust microfluidic platform combined with analytical technique that can be portable and able to detect and identify the molecules. We integrate a 3D plasmonic architecture based on closely packed mesoporous silica (MCM48) nanospheres decorated by Au nanoparticles arrays, denoted as MCM48@Au, within a Si microfluidic chip. The SERS performance of the plasmonic platform is thoroughly analyzed using DMMP as model neurotoxic simulant. The chip was able to detect 2.5ppmV with a portable Raman equipment and be reused, after heat regeneratsion, several times without losing its performance.

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NFP Research Area: Nanomaterials for energy, environment and safety: MOLECULAR RECOGNITION: DETECTION OF HAZARDOUS COMPOUNDS

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