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Surface Plasmon Resonance Biosensor for Sensitive Nanoplastic Detection
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Researchers designed a compact plasmonic sensor based on a silver metal-insulator-metal waveguide coupled to an octagonal cavity embedded with circular nanorods, achieving dual resonance sensitivities of 1,321 and 2,198 nm/RIU that enable optical detection of microplastics and aquatic microorganisms through refractive index shifts.
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