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Waveguide mid-infrared absorption spectroscopy of proteins in the spectral fingerprint region

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Abstract

Integration of paper fluidics with Ge-on-Si waveguides for evanescent-field sensing of liquid analytes is demonstrated. Mid-infrared absorption spectroscopy of BSA protein in water and of toluene is shown in the fingerprint region of 1900-1000 cm−1.

© 2019 The Author(s)

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