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Various stages of detection and regeneration using chalcogenide (Chg) waveguides for the propagation of the evanescent IR wave whose sensitivity is increased by the presence of gold nanoantennas (NAs) for IR absorption enhancement and a hydrophobic polymer freeing from detrimental water absorption (Step 1: SEIRA IR sensor in contact with complex water; Step 2: hydrocarbon detection by the SEIRA IR sensor; Step 3: regeneration of the hydrophobic polymer).
