Li, A.-P., Müller, F., Birner, A., Nielsch, K. and Gösele, U.
Advanced Materials 11, (6), pp 483-487 (1999) Hexagonally ordered nanopore arrays in anodic alumina with high aspect ratios (see Fig.) have been produced using a self-organization process. The pore arrays are straight and parallel, and of polycrystalline structure. The distance between pores can be controlled by adjusting the electrolyte and the applied voltage. The arrays could find application as photonic crystals. [References: 21]
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