Abstract
This article was mistakenly published twice. For this reason this duplicate article has now been retracted. For citation purposes please cite the original: http://www.inljournal.com/?_action=articleInfo&article=21 Al-doped and un-doped ZnO thin films deposited on quartz substrates by the nebulized spray pyrolysis method were studied to investigate the wettability of the surface. The main objective of the present study was to investigate the wettability of ZnO thin film by changing the concentration of Al doping. Microstructure and water contact angles of the films were measured by scanning electron microscopy (SEM) and using a contact angle goniometer. SEM studies revealed that the grain size within the film increases with the doping concentration. The contact angles were studied to see the effect of aluminum doping on the hydrophilicity of the film. ZnO films were found to be hydrophobic in nature. A good correlation was observed between the SEM micrographs and contact angle results. The nature of the film was found to change from being hydrophobic to hydrophilic after the treatment in low-pressure DC glow discharge plasma, which, however, was reversible with the storage time.
Highlights
ZnO-based nanostructures are of peculiar interest among the semiconductor oxides due to their superior optical and electronic properties and several potential applications in nanoscale transistors, sensors, and UV laser diodes [1,2]
Experimental methods In the present study, the ZnO thin films were deposited on quartz substrates, using a nebulizer, by spray pyrolysis
In order to study the reversible nature of plasma surface modification, contact angles were measured for various storage time starting from the time just after the treatment to 2 days
Summary
ZnO-based nanostructures are of peculiar interest among the semiconductor oxides due to their superior optical and electronic properties and several potential applications in nanoscale transistors, sensors, and UV laser diodes [1,2]. Wettability is a very important characteristic of a solid surface. One of the reasons for the extensive study of wetting properties of Experimental methods In the present study, the ZnO thin films were deposited on quartz substrates, using a nebulizer, by spray pyrolysis. Wettability of the film was studied by the measurement of the contact angles of water drops on the surface of the film. An investigation of the effect of plasma treatment on the hydrophobicity of the ZnO films was carried out by measuring the contact angles before and after the plasma treatment. In order to study the reversible nature of plasma surface modification, contact angles were measured for various storage time starting from the time just after the treatment to 2 days
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