Growth of carbon nanotubes and nanofibres in porous anodic alumina film

The initiation of localised corrosion in anodised AA2099-T8 alloy is simulated by using Cellular Automata (CA) method. For CA simulation, the system consisting of corrosive electrolyte, porous anodic alumina film and alloy matrix is described as a 500×300 two-dimensional square lattice. Eight types of cells are defined to construct the cellular space, with the Von Neumann neighbourhood (four cells neighbourhood) being selected. The cellular space is constructed such that a void generated by oxidation of the high-copper-containing Al-Fe-Mn-Cu-Li particle exists in the porous anodic alumina film consisting of a porous layer and a barrier layer. It is suggested that localised corrosion is preferentially initiated in the void defect region in the porous anodic film, which is related to increased corrosion product diffusion rate in this region compared with diffusion in other regions of the porous layer.

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Catalysis over Porous Anodic Alumina Film Catalysts with Different Pore Surface Concentrations

Journal of Catalysis ◽

10.1006/jcat.1999.2627 ◽

1999 ◽

Vol 187 (2) ◽

pp. 311-320 ◽

Cited By ~ 28

Author(s):

G. Patermarakis ◽

N. Nicolopoulos

Keyword(s):

Anodic Alumina ◽

Porous Anodic Alumina ◽

Pore Surface ◽

Alumina Film ◽

Anodic Alumina Film

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In-situ Infrared Spectroscopic Measurement of DNA Molecules in A Porous Anodic Alumina Film

ECS Meeting Abstracts ◽

10.1149/ma2008-02/1/38 ◽

2008 ◽

Keyword(s):

Anodic Alumina ◽

Spectroscopic Measurement ◽

Porous Anodic Alumina ◽

Dna Molecules ◽

Alumina Film ◽

Infrared Spectroscopic ◽

Anodic Alumina Film

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In-situ Observation of Formation Processes of Anodic Porous Alumina on a Si Substrate Using Infrared Absorption Spectroscopy

MRS Proceedings ◽

10.1557/proc-788-l8.6 ◽

2003 ◽

Vol 788 ◽

Author(s):

Yasuo Kimura ◽

Hirokazu Shiraki ◽

Hisao Ishii ◽

Sachiko Ono ◽

Kingo Itaya ◽

...

Keyword(s):

Infrared Absorption ◽

Anodic Alumina ◽

Porous Anodic Alumina ◽

Ir Absorption ◽

Infrared Absorption Spectroscopy ◽

Formation Processes ◽

Alumina Film ◽

Si Substrate ◽

Spectral Changes ◽

Anodic Alumina Film

ABSTRACTWe investigated formation processes of a porous anodic alumina film on a p-type silicon (Si) substrate using infrared absorption spectroscopy in the multiple internal reflection geometry (MIR-IRAS). We observed drastic IR spectral changes when porous anodic alumina film approached interfaces between an aluminum (Al) layer and a Si substrate. The intensity of the IR absorption peaks due to water (H2O) molecules and silicon oxides (SiO2) increased simultaneously with a spike of anodic current density. The IR spectral changes indicated that the penetration of electrolytes brought about inhomogeneous oxidation of a Si substrate surface. We observed that the arrangement of the SiO2 nanodots closely reflected that of pores of a porous anodic alumina film. IR absorption peaks due to porous anodic alumina finally disappeared. The formation of SiO2 nanodots on a Si substrate promoted penetration of electrolytes to peel the porous anodic alumina film off it.

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