Supramolecular-mediated immobilization of l-phenylalanine dehydrogenase on cyclodextrin-coated Au electrodes for biosensor applications

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A supramolecular approach was used for adsorbing a monolayer of adamantane-modified phenylalanine dehydrogenase on β-cyclodextrin-coated Au electrodes. The enzyme electrode (poised at +200 mV vs. Ag/AgCl) showed a linear amperometric response up to 3 mM l-phenylalanine (l-Phe) with a lower detection limit of 15 μM. The reversible nature of this immobilization approach was confirmed.

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