Raman Spectroscopy of ZnO Nanowires Obtained by Electrochemical Anodization: Effect of Thermal Treatment, Voltage and Anodizing Time

ZnO nanostructures obtained by electrochemical anodization of Zinc foil under voltage between 2.5 and 15 V, anodization time 1-5 min and thermal treatment at different temperatures (100-400 °C) were studied by Raman spectroscopy and electronic scanning microscopy. By scanning electron microscopy, it was found that at low values (time and voltage) nanoflowers with lengths close to 2 µm and diameters less than 100 nm are obtained, while at high...