Study on ZnO nanostructures characteristics: Growth time dependence

Abstract

Zinc oxide (ZnO) nanorods were successfully prepared using two-step (spin-coating and chemical bath deposition) process. Indium tin oxide (ITO) substrate was used, and before the growth process, the seed layer of ZnO was prepared on the substrate. In this study, growth time or growth durations were varied, to study its effect towards ZnO nanorod properties. Growth time was varied from 1 hour, 2 hours and 3 hours. Physical, optical and structural characterizations were conducted, to explore the properties of grown ZnO nanorods. Field emission scanning electron microscope determined that morphology structure of ZnO nanorods changes, with distinct growth duration. Ultra-violet visible spectrometer indicates that growth time or growth duration change the optical characteritics of ZnO nanorods thin film, of which transmittance and absorbance affected by the changes of growth duration. In addition, x-ray diffraction shows the crystallinity of ZnO nanorods improved when growth time increased.