Growth peculiarities of aluminum anodic oxide at high voltages in diluted phosphoric acid

Jagminas, Arūnas; Bigelien, D; Mikulskas, I.; Tomašiūnas, R.

doi:10.1016/s0022-0248(01)01625-6

Cited by 45 publications

(22 citation statements)

References 29 publications

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“…Jagminas et al . [39] varied the phosphoric concentration from 0.005 to 0.3 M and tested the breakdown voltage using aluminum of different acid purities and found a convergence point of a breakdown voltage at 260 V corresponding to a cell size of approximately 650 nm, which was suggested as the cell size limit for anodization in phosphoric acid. Distinct from the prior work, we demonstrate here long-range ordered nanoporous AAO with cell sizes as large as 760 nm is possible by anodization in phosphoric acid.…”

Section: Resultsmentioning

confidence: 99%

Nanoporous anodic aluminum oxide with a long-range order and tunable cell sizes by phosphoric acid anodization on pre-patterned substrates

Surawathanawises¹,

Cheng²

2014

Electrochimica Acta

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Nanoporous anodic aluminum oxide (AAO) has been explored for various applications due to its regular cell arrangement and relatively easy fabrication processes. However, conventional two-step anodization based on self-organization only allows the fabrication of a few discrete cell sizes and formation of small domains of hexagonally packed pores. Recent efforts to pre-pattern aluminum followed with anodization significantly improve the regularity and available pore geometries in AAO, while systematic study of the anodization condition, especially the impact of acid composition on pore formation guided by nanoindentation is still lacking. In this work, we pre-patterned aluminium thin films using ordered monolayers of silica beads and formed porous AAO in a single-step anodization in phosphoric acid. Controllable cell sizes ranging from 280 nm to 760 nm were obtained, matching the diameters of the silica nanobead molds used. This range of cell size is significantly greater than what has been reported for AAO formed in phosphoric acid in the literature. In addition, the relationships between the acid concentration, cell size, pore size, anodization voltage and film growth rate were studied quantitatively. The results are consistent with the theory of oxide formation through an electrochemical reaction. Not only does this study provide useful operational conditions of nanoindentation induced anodization in phosphoric acid, it also generates significant information for fundamental understanding of AAO formation.

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Section: Resultsmentioning

confidence: 99%

Nanoporous anodic aluminum oxide with a long-range order and tunable cell sizes by phosphoric acid anodization on pre-patterned substrates

Surawathanawises¹,

Cheng²

2014

Electrochimica Acta

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“…The pore diameter, cell size, and barrier layer thickness positioned at the bottom of alumina pores ( Fig. 1) are all linearly dependent on the anodizing voltage with some exceptions (Jagminas et al 2001), while the depth of pores is simply controlled by anodizing time (Metzger et al 2000). According to the final applications the thickness of alumina templates is usually limited to 20-30 μm, but much thicker templates (Römer & Steinem 2004), as well as very thin ( Kokonou et al 2007), are sometimes required.…”

Section: Porous Aluminamentioning

confidence: 99%

Annealing Effects on the Metal and Semiconductor Nanowires Loaded Inside the Alumina Pores

Jagminas¹

2010

Electrodeposited Nanowires and Their Applications

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“…. 16 Considerable evidence shows that the PPy coatings enhance the corrosion resistance of metals. [17][18][19] The oxide/hydroxide passive film on aluminium renders difficult the pyrrole (Py) electropolymerization on its surface.…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole coating doped with dihydrogenophosphate ion to protect aluminium against corrosion in sodium chloride medium

Martins

Diblikova

Bazzaoui

et al. 2012

J. Braz. Chem. Soc.

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A electrodeposição do polipirrole (PPy) sobre alumínio em soluções de ácido fosfórico foi obtida através de técnicas potenciodinâmicas, potenciostáticas e galvanostáticas. O comportamento do alumínio revestido com polipirrole em meio de cloreto de sódio foi investigado através do potencial de circuito aberto e espectroscopia de impedância electroquímica. É proposto um mecanismo para explicar o efeito benéfico do íon dihidrogenofosfato na passivação do alumínio.The electrodeposition of polypyrrole (PPy) on aluminium electrodes has been achieved in phosphoric acid medium by using potentiodynamic, potentiostatic and galvanostatic techniques. The corrosion behavior of polypyrrole on aluminium in sodium chloride medium has been investigated by open circuit potential and electrochemical impedance spectroscopy. A mechanism to explain the beneficial effect of PPy-doping dihydrogenophosphate ion in the passivation of aluminium is proposed.

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Growth peculiarities of aluminum anodic oxide at high voltages in diluted phosphoric acid

Cited by 45 publications

References 29 publications

Nanoporous anodic aluminum oxide with a long-range order and tunable cell sizes by phosphoric acid anodization on pre-patterned substrates

Nanoporous anodic aluminum oxide with a long-range order and tunable cell sizes by phosphoric acid anodization on pre-patterned substrates

Annealing Effects on the Metal and Semiconductor Nanowires Loaded Inside the Alumina Pores

Polypyrrole coating doped with dihydrogenophosphate ion to protect aluminium against corrosion in sodium chloride medium

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