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Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine
Author(s) -
Xie Fang,
Zhou Yueming,
Liang Xizhen,
Zhou Zhiping,
Luo Jianqiang,
Liu Shujuan,
Ma Jianguo
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201900062
Subject(s) - graphene , ascorbic acid , cyclic voltammetry , dielectric spectroscopy , electrochemistry , biosensor , electrode , materials science , composite number , chemical engineering , dopamine , oxide , inorganic chemistry , nuclear chemistry , chemistry , nanotechnology , composite material , metallurgy , food science , neuroscience , engineering , biology
A novel permselective film of electrodeposited polydopamine (PDA) on electrochemical reduced graphene oxide (erGO) surface was prepared. The obtained composite films were characterized by atomic force microscope (AFM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The influences of permselectivity with different electropolymerized cycles and concentration of dopamine on electrochemical responses of biomolecules on electrode were investigated. It was found that the composite film held high cationic permeable to dopamine (DA) and good suppression of ascorbic acid (AA) and uric acid (UA) using CV. The anodic peak currents were proportional to dopamine concentration. The significant permselectivity suggested that the PDA/graphene‐modified electrode has opened a new route to high selective dopamine biosensor.