Preparation and characterization of ZnO/PVA hybrid film for application in electrochemical sensing

Semiconductor based transducers play an important role in electrochemical sensing [1]. In this study, zinc oxide/polyvinyl alcohol nanostructured hybrid film were prepared by electrochemical deposition method on the F-doped SnO2 conductive glass (FTO/ZnO/PVA). Nanostructured ZnO is found to exhibit unique properties including high specific surface area, high catalytic efficiency, strong adsorption ability, biocompatibility and high electron communication features[2]. Nanostructured ZnO can be prepared using sol-gel, electrophoresis, RF sputtering, hydrothermal, and molecular beam epitaxy techniques. Among these, electrochemical depositionof ZnO yields controlled morphology and thickness by adjusting electrochemical parameterssuch as current or potential. Besides, higher deposition rates can be easily obtained [4,5]. PVA selection criteria was based on its water solubility, affording further electrical conductivity to theZnO–polymer hybrid film transducer, and controlling the growth and crystallization of ZnO bytuning PVA content in electrodeposition bath.[6] Surface of the ZnO–polymer hybrid film characterized by field emission-scanning electron microscopy (FE-SEM). Monitoring of sensor fabrication was performed using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The fabricated sensor can be applied for electrochemical sensing.

کلیدواژه ها:

Electrochemical deposition ، hybrid film ، Polyvinyl alcohol ، Electrochemical sensing