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Abstract
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The first step of paper nickel nanowires was fabricated by DC electrodeposition method in Anodic aluminum oxide templates. For fabrication high quality nanowires with arbitrary diameter and uniform length , the optimal conditions of electrodeposition (pH, voltage, electrolyte concentration) and nanowires growth rate were calculated. To achieve high porosity and pseudo-brushes surface of nanowires, optimal conditions for removing of template such as etchant concentration and etching rate were investigated by using of SEM and AFM images of surface topography. The next step was the use of the high porosity, specific surface area of nickel nanowires to immobilize neutral red on carbon paste electrode surface. Modified carbon paste electrode with nickel nanostructures and neutral red were investigated by electrochemical techniques. Various parameter such as electron transfer rate constant, charge transfer coefficient, surface coverage concentration and effective surface area of the electrode were calculated. Finally the modified electrode used for fabrication of sensitive persulfate electrochemical sensor. Result shown the modified electrode has good ability for persulfate detection in standard and real samples.
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