Morphological characterization of ZnO nanotubes
Abstract
In this paper we present the procedure for zinc oxide (ZnO) nanotubes synthesis and their corresponding characterization. characterization . ZnO nanotubes were synthesized on previously optimized substrates, which is called "seed layer" and also on glass substrates in order to compare. The optimization of the seed layer was performed previously by ultrasonic spray pyrolysis by deposition of a ZnO thin film. Nanotubes growth was carried out by chemical bath deposition method. The substrates were immersed by facing the bottom of the glass beaker. Samples were studied using atomic force microscopy in order to study their morphological characteristics. Unlike other works, the synthesis was carried out in aqueous solution by utilizing zinc nitrate precursor and monoethanolamine as a control size agent. It was observed that uniform and hexagonal cross section nanotubes grew only on substrates with the seed layer deposition. On the other hand, position of the substrate induced a vertical and uniform growth of nanotubes in the normal direction to the substrate. Average diameter of nanotubes was 31.6 nm and average aspect ratio was 2.59 nm.
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