Tailoring defect structure and optical absorption of porous anodic aluminum 
oxide membranes

Yan, H. D.; Lemmens, P.; Wulferding, D.; Shi, J. M.; Becker, K. D.; Lin, C. T.; Lak, A.; Schilling, M.

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Tailoring defect structure and optical absorption of porous anodic aluminum oxide membranes

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Lemmens, P.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Lin, C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Yan, H. D., Lemmens, P., Wulferding, D., Shi, J. M., Becker, K. D., Lin, C. T., et al. (2012). Tailoring defect structure and optical absorption of porous anodic aluminum oxide membranes. Materials Chemistry and Physics, 135(1), 206-211.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C244-A

Abstract

Defects influence the optical and electronic properties of nanostructured materials that may be relevant for applications. In self-organized anodic aluminum oxide (MO) templates we have investigated the effect of annealing, doping and nanoscale metal deposition. Optical absorption spectroscopy has been used as a sensitive probe for the defect density in AAO templates. The electronic spectra are found to be dominated by bands which originate from oxygen-deficient color centers (F+, F and F-2). In annealing studies, the integrated absorption of the bands changes non-monotonically with annealing temperature and annealing time. This demonstrates that the concentration of defects can be optimized to tailor the optical properties of the AAO. Metallic Au wires are deposited in the template to establish a plasmonic template or array. The investigations provide an interesting insight into the interplay of reactivity and diffusivity on nanoscales. (C) 2012 Elsevier B.V. All rights reserved.