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Self-organization of porous anodic alumina films studied in situ by grazing-incidence transmission small-angle X-ray scattering

Evertsson, Jonas LU ; A. Vinogradov, Nikolay LU orcid ; Harlow, Gary S. LU ; Carlà, Francesco ; R. McKibbin, Sarah ; Rullik, Lisa LU ; Linpé, Weronica LU ; Felici, Roberto and Lundgren, Edvin LU (2018) In RSC Advances 8(34). p.18980-18991
Abstract
Self-ordered porous anodic alumina (PAA) films are studied extensively due to a large number of possible applications in nanotechnology and low cost of production. Whereas empirical relationships between growth conditions and produced oxides have been established, fundamental aspects regarding pore formation and self-organization are still under debate. We present in situ structural studies of PAA films using grazing-incidence transmission small-angle X-ray scattering. We have considered the two most used recipes where the pores self-organize: 0.3 M H2SO4 at 25 V and 0.3 M C2H2O4 at 40 V. During anodization we have followed the evolution of the structural parameters: average interpore distance, length of ordered pores domains, and... (More)
Self-ordered porous anodic alumina (PAA) films are studied extensively due to a large number of possible applications in nanotechnology and low cost of production. Whereas empirical relationships between growth conditions and produced oxides have been established, fundamental aspects regarding pore formation and self-organization are still under debate. We present in situ structural studies of PAA films using grazing-incidence transmission small-angle X-ray scattering. We have considered the two most used recipes where the pores self-organize: 0.3 M H2SO4 at 25 V and 0.3 M C2H2O4 at 40 V. During anodization we have followed the evolution of the structural parameters: average interpore distance, length of ordered pores domains, and thickness of the porous oxide layer. Compared to the extensively used ex situ investigations, our approach gives an unprecedented temporal accuracy in determination of the parameters. By using of Al(100), Al(110) and Al(111) surfaces, the influence of surface orientation on the structural evolution was studied, and no significant differences in the interpore distance and domain length could be observed. However, the rate of oxide growth in 0.3 M C2H2O4 at 40 V was significantly influenced by the surface orientation, where the slowest growth occurs for Al(111). In 0.3 M H2SO4 at 25 V, the growth rates were higher, but the influence of surface orientation was not obvious. The structural evolution was also studied on pre-patterned aluminum surfaces. These studies show that although the initial structures of the oxides are governed by pre-patterning geometry, the final structures are dictated by the anodization conditions. (Less)
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Contribution to journal
publication status
published
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in
RSC Advances
volume
8
issue
34
pages
12 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85047563890
ISSN
2046-2069
DOI
10.1039/C8RA02913J
language
English
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yes
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b2f7aeef-d927-4630-befb-cc8d678a7711
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https://pubs.rsc.org/en/content/articlelanding/2018/ra/c8ra02913j
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date added to LUP
2019-05-08 14:59:06
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2023-11-04 12:35:23
@article{b2f7aeef-d927-4630-befb-cc8d678a7711,
  abstract     = {{Self-ordered porous anodic alumina (PAA) films are studied extensively due to a large number of possible applications in nanotechnology and low cost of production. Whereas empirical relationships between growth conditions and produced oxides have been established, fundamental aspects regarding pore formation and self-organization are still under debate. We present in situ structural studies of PAA films using grazing-incidence transmission small-angle X-ray scattering. We have considered the two most used recipes where the pores self-organize: 0.3 M H2SO4 at 25 V and 0.3 M C2H2O4 at 40 V. During anodization we have followed the evolution of the structural parameters: average interpore distance, length of ordered pores domains, and thickness of the porous oxide layer. Compared to the extensively used ex situ investigations, our approach gives an unprecedented temporal accuracy in determination of the parameters. By using of Al(100), Al(110) and Al(111) surfaces, the influence of surface orientation on the structural evolution was studied, and no significant differences in the interpore distance and domain length could be observed. However, the rate of oxide growth in 0.3 M C2H2O4 at 40 V was significantly influenced by the surface orientation, where the slowest growth occurs for Al(111). In 0.3 M H2SO4 at 25 V, the growth rates were higher, but the influence of surface orientation was not obvious. The structural evolution was also studied on pre-patterned aluminum surfaces. These studies show that although the initial structures of the oxides are governed by pre-patterning geometry, the final structures are dictated by the anodization conditions.}},
  author       = {{Evertsson, Jonas and A. Vinogradov, Nikolay and Harlow, Gary S. and Carlà, Francesco and R. McKibbin, Sarah and Rullik, Lisa and Linpé, Weronica and Felici, Roberto and Lundgren, Edvin}},
  issn         = {{2046-2069}},
  language     = {{eng}},
  number       = {{34}},
  pages        = {{18980--18991}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{RSC Advances}},
  title        = {{Self-organization of porous anodic alumina films studied in situ by grazing-incidence transmission small-angle X-ray scattering}},
  url          = {{http://dx.doi.org/10.1039/C8RA02913J}},
  doi          = {{10.1039/C8RA02913J}},
  volume       = {{8}},
  year         = {{2018}},
}