Structural tuning of photoluminescence in nanoporous anodic alumina by hard anodization in oxalic and malonic acids

Abel Boavida dos Santos, Maria Alba, Mahbubur M. Rahman, Pilar Formentín, Josep Ferré-Borrull, Josep Pallarès, Lluis F. Marsal

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Abstract

We report on an exhaustive and systematic study about the photoluminescent properties of nanoporous anodic alumina membranes fabricated by the one-step anodization process under hard conditions in oxalic and malonic acids. This optical property is analysed as a function of several parameters (i.e. hard anodization voltage, pore diameter, membrane thickness, annealing temperature and acid electrolyte). This analysis makes it possible to tune the photoluminescent behaviour at will simply by modifying the structural characteristics of these membranes. This structural tuning ability is of special interest in such fields as optoelectronics, in which an accurate design of the basic nanostructures (e.g. microcavities, resonators, filters, supports, etc.) yields the control over their optical properties and, thus, upon the performance of the nanodevices derived from them (biosensors, interferometers, selective filters, etc.)

Original languageEnglish
Article number228
JournalNanoscale Research Letters
Volume7
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Geometric characteristics
  • Hard anodization
  • Heat treatment
  • Photoluminescence
  • Pore widening
  • Porous alumina

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