Modulation of ZnO film thickness and formation of water-hyacinth nanostructureEzhilarasan Gunasekaran, Prabakaran Shankar, Ganesh Kumar Mani and John Bosco Balaguru RayappanEur. Phys. J. Appl. Phys., 67 2 (2014) 20301DOI: https://doi.org/10.1051/epjap/2014140193