Zinc oxide (ZnO) nanorods were prepared by sol‐gel method on silicon wafer substrates using immerse technique. The silicon wafers were previously sputter coated with 6 nm of Au. Neutral solutions of zinc nitrate hexahydrate (ZnNO3.6H2O) as the precursor of Zn2+ added with stabilizer hexamethylenetetraamine (HMTA) at 1:1 ratio were successfully used to produce rod‐like ZnO nanostructures that grow laterally during subsequent thermal annealing. The morphology and optical characteristic were studied by a scanning electron microscope (SEM) and Photoluminescence (PL) spectrometer. The effects of different annealing temperature to the structural and optical property of ZnO nanorods were subsequently discussed in the paper.

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