Abstract：Alumina thin films with different structures were fabricated by one-step anodic oxidation of process on the same aluminum using oxalic acid as electrolyte, keeping a certain angle between the cathode and the anode through adjusting angle of electrolyzer. The microstructure and optical properties of thin films were studied. The results show that two areas with different holes on the same piece of aluminum foil are formed. In the range of visible light, alumina films reveal two different structural colors through controlling the thickness of films. The area ratio of different structural colors is controlled through adjusting the angle of electrolyzer. The thicknesses of the alumina thin films can be adjusted by changing the oxidation time, and then the change of structural colors at different zones can be adjusted. The results of polarization test indicate lights reflected by alumina films are linearly polarized light.
 MARTIN C R. Nanomaterials:a membrane-based synthetic approach[J]. Science,1994,266 (5193):1961-1966.
 YIN A J, LI J, JIAN W, et al. Fabrication of highly ordered metallic nanowire arrays by electrodeposition[J]. Appl Phys Lett, 2001,79(7):1039-1041.
 XU J M. Highly ordered carbon nanotube arrays and IR detection[J]. Infrared Physics & Technology,2001,42(3-5):485-491.
 LI A P, MULLER F, BIMER A, et al. Hexagonal pore arrays with a 50-420nm interpore distance formed by self-organization in anodic alumina[J]. Appl Phys,1998,84(11):6023-6026.
 KAWAI S, UEDA R. Magnetic properties of anodic oxide coatings on aluminum containing electrodeposited Co and Co-Ni[J]. Electrochem Soc,1975,122(1):32-36.
 LI J, PAPADOPOULOS C, XU J M, et al. Highly-ordered carbon nanotube arrays for electronics applications[J]. Appl Phys Lett,1999,75(3):367-369.
 HUBER C A, HUBER T E, SADOQI M, et al. Nanowire array composites[J]. Science,1994,263(5148):800-802.
 ZHANG Y, LI G H, WU Y C, et al. Antimony nanowire arrays fabricated by pulsed electrodeposition in anodic alumina membranes[J]. Adv Mater,2002,14(17):1227-1230.
 GUO H T, WANG W. Retrospect and prospect of aluminium anodizing[J]. Materials Protection,2000,33(1):43-45.
 DIGGLE J W, DOWNIE T C, GOULDING C W. Anodic oxide films on aluminum[J]. Chem Rev,1969,69(3):365-405.
 MASUDA H, YAMADA H, SATOH M. Highly ordered nanochannel-array architecture in anodic alumina[J]. Appl Phys Lett,1997,71(19):2770-2772.
 MASUDA H, FUKUDA K. Ordered metal nanohole arrays made by a two-step replication of honeycomb structures of anodic alumina[J]. Science,1995,268(5216):1466-1468.
 HUCZKO A. Template-based synthesis of nanomaterials[J]. Appl Phys A,2000,70(4):365-376.
 齐亚娥, 张永胜, 胡丽天. Al2O3/Al2O3-ZrO2(3Y)层状纳米复合材料的制备与性能优化[J]. 材料工程,2013,(2):17-21. QI Ya-e, ZHANG Yong-sheng,HU Li-tian. Preparation and properties optimization of Al2O3/Al2O3-ZrO2(3Y)laminated nanocomposites[J]. J Mater Eng,2013,(2):17-21.
 WANG X H, AKAHANE T, ORIKASA H. Brilliant and tunable color of carbon-coated thin anodic aluminum oxide films[J]. Appl Phys Lett,2007,91:011908.
 ZHAO X L, MENG G W, XU Q L. Color fine-tuning of CNTs@AAO composite thin films via isotropically etching porous AAO before CNT growth and color modification by water infusion [J]. Adv Mater,2010,22(24):2637-2641.
 XU Q, YANG Y H, LIU L H,et al. Synthesis and optical properties of iridescent porous anodic alumina thin films[J]. Journal of the Electrochemical Society,2012,159(1):C25-C28.
 PATERMARAKIS G, MOUSSOUTZANIS K. Electrochemical kinetic study on the growth of porous anodic oxide films on aluminium[J]. Electrochim Acta,1995,40(6):699-708.
 MAXWELL GARNETT J C. Colours in metal glasses, in metallic films, and in metallic solutions II[J]. Philos Trans R Soc,1906,205(387):237-288.