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    Molecular Imprinted Polymer on Optical Fiber Sensor for Ethanol Vapor Biomarker Detection

    Year: 2023

    Journal: 2023 IEEE SENSORS, 2023-10

    Authors: Jitpratak, Pannathorn; Pathak, Akhilesh Kumar; Swargiary, Kankan; Viphavakit, Charusluk

    Keywords: Biomarkers; diabetes; Diabetes; Ethanol; molecular imprinted polymer; optical fiber sensor; Optical fiber sensors; Real-time systems; Sensitivity; Sensors; Volatile organic compounds

    An optical fiber sensor with a single mode-multimode-single mode (SMS) structure is proposed to detect ethanol vapor ranging between 100–500 ppm via the evanescent field interaction at the interface between the optical fiber and ethanol vapor. The proposed optical fiber sensor offers real-time and non-invasive monitoring of ethanol vapor, which is one of the biomarkers of diabetes. Molecular imprinted polymer (MIP) is coated at a multimode fiber region, which is considered to be a sensing area, to improve the selectivity of the ethanol biomarker. The sensor works based on wavelength interrogation by detecting the change in wavelength due to the change in vapor concentration. The fabricated sensor has a sensitivity of 0.0013 nm/ppm, which suggests the potential to be used as a monitoring device for breath analysis.
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