Preparation of polyaniline–TiO2 nanotube composite for the development of electrochemical biosensors
作者： Jie Zhu , Xiaoqiang Liu , Xinhai Wang , Xiaohe Huo , Rui Yan
DOI: 10.1016/J.SNB.2015.06.131
关键词: Biocompatibility 、 Materials science 、 Cyclic voltammetry 、 Electrode 、 Nanotechnology 、 Polyaniline 、 Glucose oxidase 、 Biosensor 、 Composite number 、 Electrochemistry
摘要: Abstract The significant and novel aspect of this work lies in the preparation a polyaniline (PANI)–TiO2 nanotube (TNT) composite which can provide excellent biocompatibility, good electrical conductivity, low electrochemical interferences high signal-to-noise ratio for development biosensors. Using hydrothermal method, TiO2 nanoparticles were initially transformed into TNTs, on aniline was then polymerized by oxidative polymerization to form an intimate uniform PANI–TNT composite. After being characterized different spectroscopic techniques, used immobilize glucose oxidase (GOD) construction biosensor. direct electrochemistry electro-catalytic performance biosensors based PANI–TNTs TNTs studied cyclic voltammetry. GOD modified electrodes achieved heterogeneous electron transfer rate constant (ks) estimated be 9.3 s−1. Furthermore, redox currents at biosensor improved ∼55% compared that TNT exhibited sensitivity (11.4 μA mM−1), wide dynamic range (10–2500 μM) limit detection (0.5 μM), are attributed properties
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