N ARAB - PhD student, Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
F Mortazavi, - Master student, Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
L Fotouhi, - Professor, Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran

In this study, an excellent electrochemical sensor based on electropolymerization of aspartic acid on an electrode modified with a nanocomposite consisting of multiwalled carbon nanotubes, zinc oxide nanoparticles with sodium dodecyl sulfate was developed. The obtained suspension was first identified and characterized by scanning electron microscopy and then the electrochemical behavior of a type of β- blocker was investigated. Differential pulse voltammograms recorded on the proposed sensor showed an increase in anodic peak current of β- blocker and a peak displacement to more negative values. This phenomenon illustrates the electrocatalytic properties of the utilized modifier and enhancement of the active surface area of the modified electrode.

Voltammetry, Modified electrode, Surfactant, β- blocker