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On the growth sequence of highly ordered nanoporous anodic aluminium oxide

Ghorbani, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2005.02.018
  3. Publisher: Elsevier Ltd , 2006
  4. Abstract:
  5. Anodic aluminium oxide films were fabricated by well known two-step anodizing process in oxalic acid electrolyte. The ordering characteristics (ordered pore domains, average pore diameter size and through-pore arrangement) of anodic aluminium oxide films, obtained in different growth sequences, were identified by microscopic analysis such as ex situ contact-mode atomic force microcopy and scanning electron microscopy. Flattened areas in which some pits are seen mostly cover the electropolished surface of aluminium. Single anodizing of aluminium produces a broad distribution of nanopore size, whereas induces a highly ordered hemispherical pattern, which plays the ordered nucleation sites for the second anodizing step. Moreover, a quasi-linear growth behavior exists for the ordered domain growth versus the duration of first step anodizing. The through-pore arrangement of ideally grown membranes is not influenced by increasing the duration of second step anodizing. © 2005 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Anodic oxidation ; Atomic force microscopy ; Crystal growth ; Electrolytic polishing ; Nucleation ; Pitting ; Scanning electron microscopy ; Aluminium oxide ; Nanomaterials ; Nanoporous ; Alumina
  8. Source: Materials and Design ; Volume 27, Issue 10 , 2006 , Pages 983-988 ; 02613069 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0261306905000579