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Metasurface-enhanced mid-infrared spectroscopy in the liquid phase. | LitMetric

AI Article Synopsis

Article Abstract

Vibrational spectroscopy is an important tool in chemical and biological analysis. A key issue when applying vibrational spectroscopy to dilute liquid samples is the inherently low sensitivity caused by short interaction lengths and small extinction coefficients, combined with low target molecule concentrations. Here, we introduce a novel type of surface-enhanced infrared absorption spectroscopy based on the resonance of a dielectric metasurface. We demonstrate that the method is suitable for probing vibrational bands of dilute analytes with a range of spectral linewidths. We observe that the absorption signal is enhanced by 1-2 orders of magnitude and show that this enhancement leads to a lower limit of detection compared to attenuated total reflection (ATR). Overall, the technique provides an important addition to the spectroscopist's toolkit especially for probing dilute samples.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9645393PMC
http://dx.doi.org/10.1039/d2sc03927cDOI Listing

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