CAJ | 학술논문

用3-巯基丙酸（MPA）包覆的碲化镉量子点（CdTe QDs）在金电极上进行自组装,制备了CdTe QDs修饰金电极（CdTe QDs/Au E）。利用循环伏安法研究此修饰电极的电化学行为,以[Fe（CN）6]3-/4-为探针,考察了CdTe QDs自组装膜修饰金电极的电化学性质。而且研究了多巴胺（DA）在此电极上的电化学行为,结果表明：DA在此修饰电极上可被电催化氧化。差分脉冲伏安（DPV）氧化峰电流与DA浓度在1.00×10-9～6.40×10-5mol/L范围内呈线性关系,检出限为3.30×10-10mol/L.
용3-구기병산（MPA）포복적제화력양자점（CdTe QDs）재금전겁상진행자조장,제비료CdTe QDs수식금전겁（CdTe QDs/Au E）。이용순배복안법연구차수식전겁적전화학행위,이[Fe（CN）6]3-/4-위탐침,고찰료CdTe QDs자조장막수식금전겁적전화학성질。이차연구료다파알（DA）재차전겁상적전화학행위,결과표명：DA재차수식전겁상가피전최화양화。차분맥충복안（DPV）양화봉전류여DA농도재1.00×10-9～6.40×10-5mol/L범위내정선성관계,검출한위3.30×10-10mol/L.
3-mercaptopropionic acid（3-MPA） capped cadmium tellurium quantum dots（CdTe QDs） self-assembled monolayer modified electrode（CdTe QDs /Au E） was prepared and its electrochemical behavior was studied by cyclic voltammetry.The results showed that a self-assembled monolayer（SAM） was formed on the surface of gold electrode.[Fe（CN）6]3-/4-redox couple was used as the electrochemical probe to study the electrochemical characteristics of SAM modified gold electrode.The electrochemical behaviors of dopamine（DA） were investigated at CdTe QDs /Au E.The results showed that the electrochemical oxidation of DA could be electrocatalyzed.There were linear relationships between the anodic peak current and the concentration of DA（1.00×10-9 ～ 6.40×10-5 mol/L） in differential pulse voltammograms,the detection limit was 3.03 ×10-10 mol/L.The modified electrode shows high stability,good reproducibility and can avoid the commonly coexisted interference.