Novel structure formation at the bottom surface of porous anodic alumina fabricated by single step anodization process

Ali, Ghafar; Ahmad, Mushtaq; Akhter, J.I.; Maqbool, Muhammad; Cho, Sung Oh

doi:10.1016/j.micron.2010.04.010

Cited by 23 publications

(11 citation statements)

References 39 publications

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“…Optimized value of voltage was measured viz. 40 V. This value agrees with the voltage corresponding to self-ordered anodizing at constant current available in literature [21,22]. Therefore, anodization was carried out in electrolytic solution of 0.3 M oxalic acid at the voltage of 40 V at 5°C temperature.…”

Section: Measurement Of Current Density For Anodizationsupporting

confidence: 86%

Formation of self-ordered porous anodized alumina template for growing tungsten trioxide nanowires

et al. 2014

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Uniform porous anodized aluminum oxide (AAO) membrane has been synthesized by two-step anodization for fabricating tungsten trioxide (WO 3 ) nanowires. Under assayed conditions, uniform porous structure of alumina (Al 2 O 3 ) membrane with long range ordered hexagonal arrangements of nanopores was achieved. The self-assembled template possesses pores of internal diameter of 50 nm and interpore distance (d int ) of 80 nm with a thickness of about 80 lm, i.e., used for fabrication of nanostructures. WO 3 nanowires have been fabricated by simple electroless deposition method inside Al 2 O 3 nanopores. SEM images show tungsten trioxide nanowire with internal diameter of about 50 nm, similar to porous diameter of AAO template. XRD results showed that nanowires exist in cubic crystalline state with minor proportion of monoclinic phase.

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Section: Measurement Of Current Density For Anodizationsupporting

confidence: 86%

Formation of self-ordered porous anodized alumina template for growing tungsten trioxide nanowires

et al. 2014

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“…Self-organized nanoporous structure with hexagonal ordered morphology can be obtained on a highly pure Al surface via electrochemical anodization in acidic medium [1,2]. AAO is extensively applied in the fields of biosensor [3] and biofiltration [4] and as a nanotemplate [5,6] for the fabrication of secondary nanostructured materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of cobalt-nickel binary nanowires in a highly ordered alumina template via AC electrodeposition

Ali

Maqbool

2013

Nanoscale Res Lett

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Cobalt-nickel (Co-Ni) binary alloy nanowires of different compositions were co-deposited in the nanopores of highly ordered anodic aluminum oxide (AAO) templates from a single sulfate bath using alternating current (AC) electrodeposition. AC electrodeposition was accomplished without modifying or removing the barrier layer. Field emission scanning electron microscope was used to study the morphology of templates and alloy nanowires. Energy-dispersive X-ray analysis confirmed the deposition of Co-Ni alloy nanowires in the AAO templates. Average diameter of the alloy nanowires was approximately 40 nm which is equal to the diameter of nanopore. X-ray diffraction analysis showed that the alloy nanowires consisted of both hexagonal close-packed and face-centered cubic phases. Magnetic measurements showed that the easy x-axis of magnetization is parallel to the nanowires with coercivity of approximately 706 Oe. AC electrodeposition is very simple, fast, and is useful for the homogenous deposition of various secondary nanostuctured materials into the nanopores of AAO.

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“…It is clear from the image that TNP structure is retained even after a prolonged anodizing time and the nanopores are arranged more regularly when compared to a short anodizing time. Thus, prolonged anodizing time improves the pore ordering to a great extent [ 5 ]. However, the surface is not very much clean and some debris can be clearly seen in the image.…”

Section: Resultsmentioning

confidence: 99%

“…Particular attention was paid to the self-organized porous materials due to their self-ordered structure and ease of fabrication. One of the most extensively investigated porous materials is porous anodic alumina (PAA) [ 5 ]. Highly ordered nano-porous structure can be fabricated on pure aluminum under optimized conditions via two-step electrochemical anodization [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of complete titania nanoporous structures via electrochemical anodization of Ti

et al. 2011

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We present a novel method to fabricate complete and highly oriented anodic titanium oxide (ATO) nano-porous structures with uniform and parallel nanochannels. ATO nano-porous structures are fabricated by anodizing a Ti-foil in two different organic viscous electrolytes at room temperature using a two-step anodizing method. TiO2 nanotubes covered with a few nanometer thin nano-porous layer is produced when the first and the second anodization are carried out in the same electrolyte. However, a complete titania nano-porous (TNP) structures are obtained when the second anodization is conducted in a viscous electrolyte when compared to the first one. TNP structure was attributed to the suppression of F-rich layer dissolution between the cell boundaries in the viscous electrolyte. The structural morphologies were examined by field emission scanning electron microscope. The average pore diameter is approximately 70 nm, while the average inter-pore distance is approximately 130 nm. These TNP structures are useful to fabricate other nanostructure materials and nanodevices.

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Novel structure formation at the bottom surface of porous anodic alumina fabricated by single step anodization process

Cited by 23 publications

References 39 publications

Formation of self-ordered porous anodized alumina template for growing tungsten trioxide nanowires

Formation of self-ordered porous anodized alumina template for growing tungsten trioxide nanowires

Fabrication of cobalt-nickel binary nanowires in a highly ordered alumina template via AC electrodeposition

Fabrication of complete titania nanoporous structures via electrochemical anodization of Ti

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