采用电化学方法在草酸溶液中制备铝基多孔阳极氧化铝膜,用原子力显微镜观察其形貌,得到平均孔径为38 nm的有序排列.用F-4500型荧光分光光度计测量其三维荧光谱,与未经氧化的铝片作对比,发现前者的激发谱在280 nm～340 nm有一个较宽的谱带,并且在253.8 nm附近有一个肩峰,发射谱有一个以417.4 nm为峰值的较宽谱带,而后者却无任何明显的发射峰和激发峰.再分别用波长为248 nm的准分子激光器和波长355 nm的三倍频YAG激光器激发,得到明亮的蓝光光谱,在同样条件下激发未经阳极氧化的高纯铝片,将二者的光致发光谱进行对比处理.实验认为,这种发光机理可能是来源于薄膜中与氧空位有关的缺陷态,而且,在成膜过程中伴随着草酸根离子的介入,导致多孔阳极氧化铝膜中亦有与草酸根离子相关的发光中心,同时,量子限域效应也使氧化铝薄膜的光学性质发生了变化.

Porous anodic aluminum oxide films with nanometer porosity have been fabricated by electrochemical method in the aqueous solution of oxalic acid. Regular porosity in about 38 nanometer size was observed using atomic force microscopy. Excitation and Emission spectrum were obtained by using F-4500 fluorometer.Compared with aluminum of not oxidize , the former has a broad peak band at about 280 nm~340 nm and a second peak at 253.8 nm in excitation spectrum, including a broad peak band at 417.4 nm in emission spectrum, while the latter without any obvious peak in either excitation or emission spectrum. Blue emission was obtained when sample was excited using 248 nm and 355 nm laser. The photoluminescence was attributed to the local structure caused by unbalance of Al and O as well as involvement of electrolyte during oxidization process, at the same time, quantum localization effect affected its optical properties.