SONG Mei-zhou1,2, GAO Fei2﹡, LIU Sheng-zhong2,3,LI Ning1, LIU Xiao-jing2 ,YANG Bo2
(1 College of Physics and Information Technology,2 College of Materials Science and Engineering, Shaanxi Normal University,3 Key Laboratory of Applied Surface and Colloid Chemistry, MOE, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Al surface periodic nanp-pits have been fabricated by anodizing Al foils in oxalic acid, phosphoric acid, and citric acid solution, and etching away the porous anodic aluminum film. Surface morphology of the fabricated Al nanp-pits was studied by scanning electron microscopy(SEM) and the results show that ordered hexagonal array of nano-pits formed on the surface of the Al foils. Average size of the Al nanp-pits increases with increasing anodizing voltage. When anodizing voltage is 300 V, with 4% citric acid and oxidation time of 2 h, the average size of the Al nanp-pits reaches to 785 nm. The light scattering properties of the fabricated Al nanp-pits were studied by light-scattering instrument. The intensity of scattered light decreases with increasing scattering angle, and the larger Al nanp-pits have stronger light scattering.
KeyWords:
porous alumina membrane; anodizing; Al nano-pit; light scattering
