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PSPR-based immunosensors for extracellular vesicle detection. (a) Detection and characterization of different brain-derived exosomes by SPR imaging; (b) dual Au nanoparticle-assisted signal amplification of SPR signals for determination of breast cancer-related exosomes. (a) Figure reproduced with permission from [84], © 2018 American Chemical Society; (b) Figure reproduced with permission from [86], © 2019 Elsevier.
