pH‐Switchable Bioelectrocatalysis Based on Weak Polyelectrolyte Multilayers |
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Authors: | Peng Sun Naifei Hu Hongyun Liu |
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Institution: | Department of Chemistry, Beijing Normal University, Beijing 100875, P.?R. China |
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Abstract: | Weak polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) were assembled into {PAH/PAA}n layer‐by‐layer films on electrodes. The cyclic voltammetry (CV) response of ferrocenecarboxylic acid (Fc(COOH)) at {PAH/PAA}5 film electrodes assembled under the specific condition showed pH‐sensitive “on‐off” switching property. This property was further used to control the electrocatalytic oxidation of glucose by glucose oxidase (GOD) with Fc(COOH) as the electron transfer mediator, so that the pH‐switchable bioelectrocatalysis could be realized. The mechanism of pH‐sensitive behavior of the system was explored and believed to originate from the pH‐dependent structure change of the films. |
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Keywords: | Layer‐by‐layer assembly pH‐sensitive permeability Boelectrocatalysis Weak polyelectrolytes Glucose oxidase |
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