Patent ID: 8268287

Claim:
A method for making a zinc oxide nanorod thin film comprising forming a zinc oxide seed layer comprising multiple crystals each having a grain size of 1-100 nm on a basal plate; and preparing a zinc oxide nanorod thin film growing solution in which the zinc oxide seed layer is allowed to grow a zinc oxide crystal columnar layer at a growing temperature ranging from 50 to 100° C. for a growing time ranging from 0.5 to 10 hours to form a zinc oxide nanorod thin film, wherein the zinc oxide nanorod thin film growing solution is a 0.001-0.1 M aqueous zinc ion solution comprising hexamethylenetetramine; wherein the zinc oxide seed layer is formed on the basal plate with a sol-gel method; and each crystal of the zinc oxide seed layer has a grain size of 5-100 nm; and wherein a sol-gel solution for making the zinc oxide seed layer is prepared, wherein the sol-gel solution comprises zinc ion, 2-methoxyethanol and monoethanolamine having a molar ratio of 1:10-40:1; the sol-gel solution is applied to the basal plate; and the basal plate is soft baked at 100° C. for 10 minutes, sintered at 200° C. for 10 minutes and then annealed at 200-800° C. to form the zinc oxide seed layer.