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(A) Optical biosensor system based on the POF–SPR platform. (B) Functionalization process of the gold surface. (C) Resonance spectra acquired in buffer solution obtained before and after the functionalization process with msAb anti-PFOA. Both measurements were obtained by dropping 50 μL of 20 sodium phosphate buffer pH 7.4 over the sensing surface, with and without the receptor layer. Reprinted from [92].
