CRYSTALLIZATION OF ANODIC ALUMINUM OXIDE MEMBRANES

2009 ◽  
Vol 23 (29) ◽  
pp. 3497-3501 ◽  
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.

Template Synthesis of Indium Nanowires Using Anodic Aluminum Oxide Membranes

2008 ◽  
Vol 8 (9) ◽  
pp. 4488-4493 ◽  
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.

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

2007 ◽  
Vol 22 (4) ◽  
pp. 1064-1071 ◽  
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.

Preparation of AgBr Nanowire Arrays in Porous Anodic Aluminium Oxide Template by Paired Cell Deposition

2013 ◽  
Vol 539 ◽  
pp. 255-258
Author(s):  
Miao Miao Cui ◽  
Xiu Chun Yang ◽  
Jun Wei Hou
Keyword(s):  
Anodic Aluminum Oxide ◽  
Average Diameter ◽  
Anodic Aluminum Oxide Template ◽  
Nanowire Arrays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anodic Aluminum ◽  
Anodization Process ◽  
Face Centered ◽  
Paired Cell

Firstly, porous anodic aluminum oxide template was prepared by a two-step anodization process, then AgBr nanowire arrays were successfully synthesized by paired cell deposition. X-ray diffraction (XRD) indicates that the as-synthesized samples are composed of face-centered AgBr. Field-emission scanning electron microscopy (FESEM) shows that the average diameter of the nanowire arrays is about 70nm.

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

2007 ◽  
Vol 14 (06) ◽  
pp. 1039-1045
Author(s):  
HANSONG XUE ◽  
HUAJI LI ◽  
YU YI ◽  
HUIFANG HU
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Acid Solutions ◽  
X Ray Diffraction ◽  
Porous Anodic Aluminum Oxide ◽  
X Ray ◽  
Anodic Aluminum ◽  
Transmission Electron ◽  
Formation And Evolution ◽  
Ordered Porous

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.

Nanostructure of the nanopores in anodic aluminum oxide films used as template to fabricate Ag nanowires

2009 ◽  
Vol 24 (5) ◽  
pp. 1735-1740 ◽  
Author(s):  
Junping Zhang ◽  
Jerrold E. Kielbasa ◽  
David L. Carroll
Keyword(s):  
Aluminum Oxide ◽  
Barrier Layer ◽  
Anodic Aluminum Oxide ◽  
Silver Nanowires ◽  
Aao Template ◽  
Anodic Aluminum ◽  
Anodization Process ◽  
Nanoporous Anodic Aluminum Oxide ◽  
Aluminum Substrates ◽  
Nanoporous Anodic Aluminum

Well-ordered nanoporous anodic aluminum oxide (AAO) templates have been prepared on aluminum substrates by a two-step anodization process. A voltage-controlled branching method was successfully used to thin the barrier layer of the AAO template. The nanostructures of the pores, the branched subpores, and the barrier layer in the AAO template were studied in association with the anodization process and barrier layer thinning methods. Results demonstrate the voltage-controlled branching method is a facile and effective way to thin the barrier layer. Uniform silver nanowires can be easily fabricated using alternating current (ac) electrodeposition into the pores of AAO after redressing the barrier layer.

scholarly journals Negative thermal expansion of nanoporous anodic aluminum oxide membranes

2019 ◽  
Vol 114 (11) ◽  
pp. 111901 ◽  
Author(s):  
L. Forzani ◽  
C. A. Ramos ◽  
E. Vassallo Brigneti ◽  
A. M. Gennaro ◽  
R. R. Koropecki
Keyword(s):  
Thermal Expansion ◽  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Negative Thermal Expansion ◽  
Anodic Aluminum ◽  
Nanoporous Anodic Aluminum Oxide ◽  
Oxide Membranes ◽  
Nanoporous Anodic Aluminum

Electrodeposited Nickel Nanowire Arrey

2007 ◽  
Vol 26-28 ◽  
pp. 585-588 ◽  
Author(s):  
B.H. Park ◽  
In Soo Kim
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Chromic Acid ◽  
X Ray ◽  
Anodic Aluminum ◽  
Nickel Nanowires ◽  
Anodization Process ◽  
Electrodeposited Nickel ◽  
Nickel Nanowire ◽  
Anodic Aluminum Oxide Templates

The anodic aluminum oxide (AAO) templates were prepared by a two step anodization process in a mixture phosphoric acid, sulfuric acid and chromic acid and oxalic acid. The pore of anodic aluminum oxide templates were hexagonal arranged pore domains. Oredred Nickel nanowires were prepared in this porous anodic aluminum oxide templates from Watt solution and additives by an electrodeposition. The diameter of Nickel nanowires in the array were about 80 nm and the length is about 800 nm with the aspect ratio of about 10. The ordered Nickel nanowires were characterized by X-ray diffractometer, scanning electron microscopy and magnetometer.

Sign in / Sign up

Export Citation Format

Share Document