Li Ying, Umasankar Yogeswaran, Chen Shen-Ming
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
Talanta. 2009 Jul 15;79(2):486-92. doi: 10.1016/j.talanta.2009.04.017. Epub 2009 Apr 16.
A conductive biocomposite film (MWCNTs-PANIFAD) which contains multi-walled carbon nanotubes (MWCNTs) along with the incorporation of poly(aniline) and poly(flavin adenine dinucleotide) co-polymer (PANIFAD) has been synthesized on gold and screen printed carbon electrodes by potentiostatic methods. The presence of MWCNTs in the MWCNTs-PANIFAD biocomposite film enhances the surface coverage concentration (Gamma) of PANIFAD and increases the electron transfer rate constant (k(s)) to 89%. Electrochemical quartz crystal microbalance studies reveal the enhancements in the functional properties of MWCNTs and PANIFAD present in MWCNTs-PANIFAD biocomposite film. Surface morphology of the biocomposite film has been studied using scanning electron microscopy and atomic force microscopy. The surface morphology results reveal that PANIFAD incorporated on MWCNTs. The MWCNTs-PANIFAD biocomposite film exhibits promising enhanced electrocatalytic activity towards the oxidation of p-acetamidophenol. The cyclic voltammetry has been used for the measurement of electroanalytical properties of p-acetamidophenol by means of PANIFAD, MWCNTs and MWCNTs-PANIFAD biocomposite film modified gold electrodes. The sensitivity value of MWCNTs-PANIFAD film (88.5 mA mM(-1)cm(-2)) is higher than the values which are obtained for PANIFAD (28.7 mA mM(-1)cm(-2)) and MWCNTs films (60.7 mA mM(-1)cm(-2)). Finally, the flow injection analysis (FIA) has been used for the amperometric detection of p-acetamidophenol at MWCNTs-PANIFAD film modified screen printed carbon electrode. The sensitivity value of MWCNTs-PANIFAD film (3.3 mA mM(-1)cm(-2)) in FIA is also higher than the value obtained for MWCNTs film (1.1 mA mM(-1)cm(-2)).
一种导电生物复合膜（MWCNTs - PANIFAD）已通过恒电位法在金电极和丝网印刷碳电极上合成，该复合膜包含多壁碳纳米管（MWCNTs）以及聚苯胺和聚黄素腺嘌呤二核苷酸共聚物（PANIFAD）。MWCNTs - PANIFAD生物复合膜中MWCNTs的存在提高了PANIFAD的表面覆盖浓度（Gamma），并使电子转移速率常数（k(s)）提高了89%。电化学石英晶体微天平研究揭示了MWCNTs - PANIFAD生物复合膜中MWCNTs和PANIFAD功能特性的增强。使用扫描电子显微镜和原子力显微镜研究了生物复合膜的表面形态。表面形态结果表明PANIFAD掺入了MWCNTs中。MWCNTs - PANIFAD生物复合膜对对乙酰氨基酚的氧化表现出有前景的增强电催化活性。循环伏安法已用于通过PANIFAD、MWCNTs和MWCNTs - PANIFAD生物复合膜修饰的金电极测量对乙酰氨基酚的电分析特性。MWCNTs - PANIFAD膜的灵敏度值（88.5 mA mM(-1)cm(-2)）高于PANIFAD膜（28.7 mA mM(-1)cm(-2)）和MWCNTs膜（60.7 mA mM(-1)cm(-2)）的值。最后，流动注射分析（FIA）已用于在MWCNTs - PANIFAD膜修饰的丝网印刷碳电极上对乙酰氨基酚的安培检测。FIA中MWCNTs - PANIFAD膜的灵敏度值（3.3 mA mM(-1)cm(-2)）也高于MWCNTs膜（1.1 mA mM(-1)cm(-2)）的值。
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