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(a) Nyquist plots for bare GCE, 4-ABA electrografted on the GCE (GCE/4-ABA), and activation of carboxylic groups (GCE/4-ABA/EDC+NHS), inset: equivalent circuit. (b) Nyquist plots for covalent coupling of nanoMIP-1 (GCE/4-ABA/EDC+NHS/nanoMIP-1) and nanoMIP-2 (GCE/4-ABA/EDC+NHS/nanoMIP-2), inset: equivalent circuit.
