Synthesis of aligned arrays of ultrathin ZnO nanotubes on a Si wafer coated with a thin ZnO film

Synthesis of aligned arrays of ultrathin ZnO nanotubes on a Si wafer coated with a thin ZnO film, is described. Systematic exploration of the effects were obtained during a systematic exploration of the effects of varying the hydrothermal growth conditions. The Si substrates were pre-coated, using PLD with a thin ZnO film shots. It was observed that the ratio of peak intensities of the UV and green yellow components in the PL spectra of the as-grown arrays is 0.32 and 3.4, implying that the nanotubes are of substantially higher crystal quality.