计时安培法
碳纳米管
介电谱
循环伏安法
材料科学
复合数
安培法
抗坏血酸
电极
扫描电子显微镜
化学工程
复合材料
电化学
纳米技术
分析化学(期刊)
化学
色谱法
食品科学
物理化学
工程类
作者
Rosa Olivé‐Monllau,M.J. Esplandiu,Jordi Bartrolı́,Mireia Baeza,Francisco Céspedes
标识
DOI:10.1016/j.snb.2010.02.017
摘要
Multiwall carbon nanotubes and resin epoxy have been used to fabricate a composite electrode for electroanalytical purposes. The optimum composite proportions for high electrode sensitivity, low limit of detection and fast response were investigated. Compositions were characterized by percolation theory, electrochemical impedance spectroscopy, cyclic voltammetry, scanning electron microscopy, atomic force microscopy and chronoamperometry. We found that around the optimum composite proportion, the electrode performance is less affected by small variations in the composition of the composite. These composite electrodes provide easy surface renewal, low background current, an efficient mass transport and are suitable for chemical modification. The potentiality of this approach in terms of electroanalytical response is demonstrated by means of the amperometric detection of ascorbic acid in water solution.
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