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(A) Schematic illustration of a tyrosinase (TYR) OMC-based biosensor (TYR/TiO2/CMK-3/PDDA/Nafion, with PDDA = poly(diallyl-dimethyl-ammonium chloride)). (B) Corresponding calibration curve for catechol and comparison to a similar system based on carbon nanotubes (reproduced from [246]).
