Nitrogen-doped carbon nanotube/polyaniline composite:Synthesis, characterization, and its application to the detection of dopamine  

作　　者：FENG XiaoMiao LI RuiMei MA YanWen CHEN RunFeng MEI QunBo FAN QuLi HUANG Wei 

机构地区：[1]Key Laboratory for Organic Electronics & Information Displays (KLOEID),Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210046, China

出　　处：《Science China Chemistry》2011年第10期1615-1621,共7页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (20905038, 20903057, 20974046, 50803027, 20874048 & 20804020);the National Basic Research Program of China (2009CB930600);the Natural Science Foundation of Jiangsu Province (08KJB150011 & 09KJB150007);the Fok Ying-Tong Education Foundation under Grant 111051

摘　　要：Nitrogen-doped carbon nanotubes (N-CNTs)/polyaniline (PANI) composites are developed as an electrode material for biosensors. The morphology, composition, and optical properties of the resulting products were characterized by transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and ultraviolet-visible absorption spectra (UV-vis). Furthermore, N-CNTs/PANI composite was immobilized on the surface of a glassy carbon electrode (GCE) and applied to construct a sensor. The obtained N-CNTs/PANI-modified GCE showed one pair of redox peaks and high catalytic activity for the oxidation of dopamine (DA) in a neutral environment. Differential pulse voltam-mograms results illustrate that the fabricated DA biosensor has high anti-interference ability towards ascorbic acid (AA). In addition, the fabricated biosensor showed superior performances with two wide linear ranges from 1 to 80 μM and from 1.5 to 3.5 mM and a low detection limit of 0.01 μM.Nitrogen-doped carbon nanotubes (N-CNTs)/polyaniline (PANI) composites are developed as an electrode material for biosensors. The morphology, composition, and optical properties of the resulting products were characterized by transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and ultraviolet-visible absorption spectra (UV-vis). Furthermore, N-CNTs/PANI composite was immobilized on the surface of a glassy carbon electrode (GCE) and applied to construct a sensor. The obtained N-CNTs/PANI-modified GCE showed one pair of redox peaks and high catalytic activity for the oxidation of dopamine (DA) in a neutral environment. Differential pulse voltam-mograms results illustrate that the fabricated DA biosensor has high anti-interference ability towards ascorbic acid (AA). In addition, the fabricated biosensor showed superior performances with two wide linear ranges from 1 to 80 μM and from 1.5 to 3.5 mM and a low detection limit of 0.01 μM.

关 键 词：nitrogen-doped carbon nanotubes (N-CNTs) POLYANILINE biosensors DOPAMINE 

分 类 号：TB383.1[一般工业技术—材料科学与工程]