Electrodeposition of polypyrrole–multiwalled carbon nanotube composite film on glassy carbon electrode and its application for determination of some species

Recently, conducting polymer/CNTs composites have been intensively studied to improve the conductivity, electronic transport, and electromagnetic properties for the applications innanoelectronic elements and electro-optical devices [1-5]. Some conducting polymer/ CNTs composites modified electrodes have bn applied to glucose [6,7], nitrite [8] and DNA [9] sensing. However, most conducting polymer/CNTs composites have good conductivity, but the background currents of these composites modified electrodes are much larger. If these conducting polymer/CNTs composites based on the surface of electrodes are directly used as sensors, the sensitivities of these methods are relative low, even some important species cannot be detected. So, it is necessary to solve this problem when these conducting polymer/CNTs were used as sensors