ORDERED POROUS ANODIC ALUMINUM OXIDE FILMS MADE BY TWO-STEP ANODIZATION

Porous Anodic Aluminum Oxide (AAO) films were prepared by two-step anodizing in sulfuric and oxalic acid solutions and observed by transmission electron microscope (TEM) and X-ray diffraction. The results show that the form of AAO film is affected by the varieties and concentrations of electrolyte, anodizing voltage, and the anodizing time; the formation and evolution processes of the AAO film are relative with the anodizing voltage severely, and the appropriate voltage is helpful to the ordering of the holes. The formation of the AAO film could be explained based on the present experiment and some former models.

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Fabrication of ordered Ta2O5 nanodots using an anodic aluminum oxide template on Si substrate

Journal of Materials Research ◽

10.1557/jmr.2007.0143 ◽

2007 ◽

Vol 22 (4) ◽

pp. 1064-1071 ◽

Cited By ~ 4

Author(s):

Ching-Jung Yang ◽

Chih Chen ◽

Pu-Wei Wu ◽

Jia-Min Shieh ◽

Shun-Min Wang ◽

...

Keyword(s):

Aluminum Oxide ◽

Photoelectron Spectroscopy ◽

Anodic Aluminum Oxide ◽

Anodic Aluminum Oxide Template ◽

X Ray Diffraction ◽

General Applicability ◽

X Ray ◽

Anodic Aluminum ◽

Transmission Electron ◽

Anodization Process

Ordered arrays of Ta2O5 nanodots were prepared using anodic aluminum oxide (AAO) as a template to support localized oxidation of TaN. Films of TaN (50 nm) and Al (1.5 μm) were deposited successively on p-type Si wafers and followed by a two-step anodization process at 40 V using oxalic acid as the electrolyte. The first anodization promoted growth of irregular AAO from overlying Al film. After chemical etching, the second anodization was performed to develop well-organized AAO channels and initiate oxidation of underlying TaN film to form tantalum oxide nanodots at the AAO pore bottoms. X-ray photoelectron spectroscopy results confirmed the chemical nature of nanodots as stoichmetric Ta2O5. X-ray diffraction demonstrated the amorphous characteristic of Ta2O5. As shown in field-emission scanning electron microscopy and transmission electron results, the Ta2O5 nanodots exhibited a hillock structure 80 nm in diameter at the bottom and 50 nm in height. We also synthesized 30-nm nanodots by adjusting AAO formation electrochemistry. This demonstrates the general applicability of the AAO template method for nanodot synthesis from nitride to oxide at a desirable size.

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Template Synthesis of Indium Nanowires Using Anodic Aluminum Oxide Membranes

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.300 ◽

2008 ◽

Vol 8 (9) ◽

pp. 4488-4493 ◽

Cited By ~ 4

Author(s):

Feng Chen ◽

Adrian H. Kitai

Keyword(s):

Aluminum Oxide ◽

Template Synthesis ◽

Anodic Aluminum Oxide ◽

Preferred Orientation ◽

Hydraulic Pressure ◽

X Ray Diffraction ◽

Aao Template ◽

X Ray ◽

Anodic Aluminum ◽

Oxide Membranes

Indium nanowires with diameters approximately 300 nm have been synthesized by a hydraulic pressure technique using anodic aluminum oxide (AAO) templates. The indium melt is injected into the AAO template and solidified to form nanostructures. The nanowires are dense, continuous and uniformly run through the entire ∼60 μm thickness of the AAO template. X-ray diffraction (XRD) reveals that the nanowires are polycrystalline with a preferred orientation. SEM is performed to characterize the morphology of the nanowires.

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The influence of initial surface conditions on field crystallization of anodic aluminum oxide films determined by synchrotron X-ray diffraction

Surface and Interface Analysis ◽

10.1002/sia.3157 ◽

2010 ◽

Vol 42 (4) ◽

pp. 215-220

Author(s):

M. Sakairi ◽

T. Kikuchi ◽

T. Suda ◽

D. Nagasawa ◽

M. Sato

Keyword(s):

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

Oxide Films ◽

Initial Surface ◽

X Ray Diffraction ◽

Surface Conditions ◽

X Ray ◽

Anodic Aluminum

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Fabrication of high quality ordered porous anodic aluminum oxide templates

High Power Laser and Particle Beams ◽

10.3788/hplpb20102207.1531 ◽

2010 ◽

Vol 22 (7) ◽

pp. 1531-1534 ◽

Cited By ~ 2

Author(s):

刘凯 Liu Kai ◽

杜凯 Du Kai ◽

陈静 Chen Jing ◽

周兰 Zhou Lan ◽

张林 Zhang Lin ◽

...

Keyword(s):

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

High Quality ◽

Porous Anodic Aluminum Oxide ◽

Anodic Aluminum ◽

Anodic Aluminum Oxide Templates ◽

Ordered Porous

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TEMPLATE SYNTHESIS OF ALIGNED SiO2 SUBMICRO-WIRES

International Journal of Nanoscience ◽

10.1142/s0219581x06004358 ◽

2006 ◽

Vol 05 (02n03) ◽

pp. 273-278

Author(s):

LIFANG CHENG ◽

XINGTANG ZHANG ◽

YUNCAI LI ◽

YABIN HUANG ◽

ZULIANG DU

Keyword(s):

Electron Microscopy ◽

Silicon Dioxide ◽

Photoelectron Spectroscopy ◽

Anodic Aluminum Oxide ◽

Tetraethyl Orthosilicate ◽

X Ray Diffraction ◽

Aao Template ◽

X Ray ◽

Anodic Aluminum ◽

Transmission Electron

Aligned silicon dioxide ( SiO 2) submicro-wires have been synthesized from tetraethyl orthosilicate (TEOS) by anodic aluminum oxide (AAO) template method. The products were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and X-ray diffraction (XRD).

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CRYSTALLIZATION OF ANODIC ALUMINUM OXIDE MEMBRANES

Modern Physics Letters B ◽

10.1142/s0217984909021557 ◽

2009 ◽

Vol 23 (29) ◽

pp. 3497-3501 ◽

Cited By ~ 1

Author(s):

SONG YUE ◽

JUAN DU ◽

YUAN ZHANG ◽

DAPENG CHEN

Keyword(s):

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

Annealing Treatment ◽

X Ray Diffraction ◽

X Ray ◽

Structure And Morphology ◽

Anodic Aluminum ◽

Anodization Process ◽

Nanoporous Anodic Aluminum Oxide ◽

Oxide Membranes

Nanoporous anodic aluminum oxide membranes (AAM) were fabricated in oxalic acid electrolytes using a two-step anodization process. Membranes' structure and morphology were examined using scanning electron microscopy and X-ray diffraction after the annealing treatment. It was found that the crystallization temperature of the AAM are greatly dependent on their thickness. Aluminum is maintained under the protection of AAM even at 1100°C when the AAM's melting manifests.

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