Porous Alumina Films with Width-Controllable Alumina Stripes
1 Semiconductor Photonics Research Center, Department of Physics, Xiamen University, 361005, Xiamen, China
2 Key Laboratory of Photonic Electronic Materials, Nanjing University, 210093, Nanjing, China
Nanoscale Research Letters 2010, 5:1977-1981 doi:10.1007/s11671-010-9735-6Published: 21 August 2010
Porous alumina films had been fabricated by anodizing from aluminum films after an electropolishing procedure. Alumina stripes without pores can be distinguished on the surface of the porous alumina films. The width of the alumina stripes increases proportionally with the anodizing voltage. And the pores tend to be initiated close to the alumina stripes. These phenomena can be ascribed to the electric field distribution in the alumina barrier layer caused by the geometric structure of the aluminum surface.