Modulation of ZnO film thickness and formation of water-hyacinth nanostructure Ezhilarasan Gunasekaran, Prabakaran Shankar, Ganesh Kumar Mani and John Bosco Balaguru Rayappan Eur. Phys. J. Appl. Phys., 67 2 (2014) 20301 Published online: 12 August 2014 DOI: 10.1051/epjap/2014140193