ArticleScientific reports2025
Biofunctionalization of chalcogenide glass fiber to enhance real time and label free detection by mid infrared spectroscopy.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Bio-functionalized chalcogenide infrared optical glass fibers have been designed for evanescent wave mid-infrared spectroscopy. Surface biotinylation of the fiber tapered sensing zone has been achieved by reactivity of a maleimide function on sulfhydryl moieties of the glassy surface. Biotin-streptavidin interactions were studied by fiber evanescent wave spectroscopy. Kinetic measurement comparisons of functionalized and non-functionalized fiber surfaces for various protein concentrations have demonstrated the efficient bio-selectivity of the functionalized glass fibers. The protein enrichment of the functionalized glassy surface allows for a significant increase of the protein detection limit, greater than two orders of magnitude as compared to reference non-functionalized fibers. A detection of minute quantities at concentrations as low as 10 parts-per-billion is demonstrated. This study shows that bio-functionalized chalcogenide optical fibers allow to combine successfully surface bio-selectivity and infrared absorption fingerprints measurements to get a remarkable sensitivity enhancement of fiber evanescent wave detection methods in the mid infrared spectral range.
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