摘要
构建了DNA-碳纳米管／聚苯胺复合膜修饰的玻碳电极，研究了抗坏血酸（AA）存在下多巴胺（DA）在该修饰电极上的电化学行为．发现DNA-碳纳米管／聚苯胺复合膜对多巴胺有明显的电催化作用。在0．1mol/L磷酸缓冲溶液（pH7．0）中，用方波伏安法（SWV）测得氧化峰电流与DA浓度在0．1～30×10-5mol／L范围内呈良好的线性关系。该修饰电极用于样品DA的检测，结果满意：
DNA-SWCNTs/PANI composite film modified glassy carbon electrode was fabricated. The electrochem- ical behavior of dopamine （DA） at the modified electrode in the presence of ascorbic acid （AA） was studied. It was found that DNA-SWCNTs/PANI composite film showed an obvious electrocatalytic activity for the oxidation of DA. The peak current was good proportional to the concentration of DA over the range 0.1-30 × 10-5 mol/L in 0.1 mol/L phosphate buffer solutin（pH7.0）. The modified electrode was used to detection sampale DA with a satisfactory result.
出处
《化学传感器》
CAS
2009年第4期43-47,共5页
Chemical Sensors
基金
教育部博士点基金(20060532006)
关键词
聚苯胺
单壁碳纳米管
DNA
多巴胺
polyaniline
single-walled carbon nanotubes, DNA
dopamine
