Effect of Focused Ion Beam Patterning on Enlarging Anodization Window and Interpore Distance for Ordered Porous Anodic Alumina

2011 ◽  
pp. 1-11 ◽  
Author(s):  
Bo Chen ◽  
Kathy Lu ◽  
Zhipeng Tian
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Interpore Distance ◽  
Ordered Porous ◽  
Ion Beam Patterning

High-speed focused-ion-beam patterning for guiding the growth of anodic alumina nanochannel arrays

2003 ◽  
Vol 82 (8) ◽  
pp. 1281-1283 ◽  
Author(s):  
N. W. Liu ◽  
A. Datta ◽  
C. Y. Liu ◽  
Y. L. Wang
Keyword(s):  
High Speed ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Anodic Alumina ◽  
Ion Beam Patterning ◽  
Nanochannel Arrays

scholarly journals Effect of Manganese Content on the Fabrication of Porous Anodic Alumina

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
C. H. Voon ◽  
M. N. Derman ◽  
U. Hashim
Keyword(s):  
Pore Diameter ◽  
Chromic Acid ◽  
Cell Structure ◽  
Manganese Content ◽  
Single Step ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Secondary Phases ◽  
Interpore Distance ◽  
Ordered Porous

The influence of manganese content on the formation of well-ordered porous anodic alumina was studied. Porous anodic alumina has been produced on aluminium substrate of different manganese content by single-step anodizing at 50 V in 0.3 M oxalic acid at 15°C for 60 minutes. The well-ordered pore and cell structure was revealed by subjecting the porous anodic alumina to oxide dissolution treatment in a mixture of chromic acid and phosphoric acid. It was found that the manganese content above 1 wt% impaired the regularity of the cell and pore structure significantly, which can be attributed to the presence of secondary phases in the starting material with manganese content above 1 wt%. The pore diameter and interpore distance decreased with the addition of manganese into the substrates. The time variation of current density and the thickness of porous anodic alumina also decreased as a function of the manganese content in the substrates.

scholarly journals Manufacturing of highly ordered porous anodic alumina with conical pore shape and tunable interpore distance in the range of 550 nm to 650 nm

2017 ◽  
Vol 35 (3) ◽  
pp. 511-518 ◽  
Author(s):  
Małgorzata Norek ◽  
Maksym Łażewski
Keyword(s):  
Citric Acid ◽  
Acid Solution ◽  
Pore Structure ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Etidronic Acid ◽  
Acid Electrolyte ◽  
High Concentration ◽  
Interpore Distance ◽  
Ordered Porous

AbstractIn this work, highly ordered porous anodic alumina (PAA) with tapered pore structure and interpore distance (Dc) in the range of 550 nm to 650 nm were fabricated. To produce hexagonal close-packed pore structure a two-step process, combining anodization in etidronic acid electrolyte in the first step and high-concentration, high-temperature anodization in citric acid electrolyte in the second step, was applied. The Al pre-patterned surface obtained in the first anodization was used to produce regular tapered pore arrays by subsequent and alternating anodization in 20 wt.% citric acid solution and pore wall etching in 10 wt.% phosphoric acid solution. The height of the tapered pores was ranging between 2.5 μm and 8.0 μm for the PAA with Dc = 550 nm and Dc = 650 nm, respectively. The geometry of the obtained graded structure can be used for a production of efficient antireflective coatings operating in IR spectral region.

Effect of Concentration of Oxalic Acid on the Synthesis of Porous Anodic Alumina (PAA) on Aluminum Alloy AA6061

2016 ◽  
Vol 857 ◽  
pp. 281-285
Author(s):  
Chun Hong Voon ◽  
Bee Ying Lim ◽  
K.L. Foo ◽  
Uda Hashim ◽  
Sung Ting Sam ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxalic Acid ◽  
Pore Size ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Edx Analysis ◽  
Interpore Distance ◽  
Ordered Porous

In this study, porous anodic alumina was formed by anodizing of aluminum alloy AA6061 in oxalic acid with concentration ranged from 0.1 M to 1.0 M respectively. AA6061 alloys were anodized at 40 V and 25°C for 60 minutes. FESEM images show that the uniformity of the pores arrangement of porous anodic alumina depends significantly on the concentration of oxalic acid. Well-ordered porous anodic alumina was formed in oxalic acid of 0.3 M, 0.5 M and 0.7 M while disordered porous anodic alumina were formed when the oxalic acid of 0.1 M and 1.0 M were used as electrolytes. EDX analysis revealed that the only peaks corresponding to aluminum and oxygen were detected. Pore size was found to increase with the concentration of oxalic acid while the interpore distance remained almost unchanged although the concentration of oxalic acid increased from 0.1 M to 0.7 M. Atypical anodic alumina without pores arrangement was formed when 1.0 M oxalic acid was used for anodizing.

Synthesis of Porous Anodic Alumina (PAA) on Aluminum Alloy AA6061 in Mixture of Phosphoric Acid and Oxalic Acid

2016 ◽  
Vol 857 ◽  
pp. 237-241
Author(s):  
Chun Hong Voon ◽  
Bee Ying Lim ◽  
K.L. Foo ◽  
Uda Hashim ◽  
Sung Ting Sam ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxalic Acid ◽  
Phosphoric Acid ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
X Ray Diffraction ◽  
X Ray ◽  
Interpore Distance ◽  
Diffraction Patterns ◽  
Ordered Porous

In this study, porous anodic alumina was formed on aluminum alloy AA6061 by anodizing using mixture of 0.3 M oxalic acid and phosphoric acid with concentration ranged from 0.1 M to 1.0 M. AA6061 alloys were anodized at 40 V and 25°C for 60 minutes. FESEM images show that the uniformity of the pores arrangement of porous anodic alumina decreased with the increasing concentration of phosphoric acid in the electrolyte. Well-ordered porous anodic alumina was formed in mixture of 0.3 M oxalic acid and 0.1 M phosphoric acid while disordered porous anodic alumina were formed when the concentration of phosphoric acid were in the range of 0.3 M to 1.0 M. Pore size and interpore distance were found to increase with the concentration of phosphoric acid in the mixture. X-ray diffraction patterns show that to γ-Al2O3 were formed on the surface of AA6061 after the anodizing process, regardless of the concentration of phosphoric acid in the mixture electrolyte.

Order–disorder transition of anodic alumina nanochannel arrays grown under the guidance of focused-ion-beam patterning

2004 ◽  
Vol 84 (14) ◽  
pp. 2509-2511 ◽  
Author(s):  
C. Y. Liu ◽  
A. Datta ◽  
N. W. Liu ◽  
C. Y. Peng ◽  
Y. L. Wang
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Anodic Alumina ◽  
Disorder Transition ◽  
Ion Beam Patterning ◽  
Nanochannel Arrays

Effect of Anodizing Voltage on the Formation of Porous Anodic Alumina on Al-0.5wt% Mn Alloys

2014 ◽  
Vol 925 ◽  
pp. 455-459 ◽  
Author(s):  
Chun Hong Voon ◽  
M.N. Derman ◽  
U. Hashim ◽  
K.L. Foo
Keyword(s):  
Pore Diameter ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Manganese Alloy ◽  
Interpore Distance ◽  
Ordered Porous

In this study, the effect of anodizing voltage on the morphologies, pore diameter and interpore distance on the porous anodic alumina formed on aluminium manganese alloy was reported. It was found that the anodizing influenced the morphologies and regularities of porous anodic alumina formed on aluminum-manganese substrate. Well ordered porous anodic alumina was obtained when anodizing voltage were 40 V and 50 V respectively. Disordered porous anodic alumina was formed when anodizing of 30 V and 70 V were applied during the anodizing process. Both pore diameter and interpore distance of porous anodic alumina increased linearly with the anodizing voltage.

A novel method for fabricating self-ordered porous anodic alumina with wide interpore distance using phosphoric/oxalic acid mixed electrolyte

2015 ◽  
Vol 151 ◽  
pp. 79-81 ◽  
Author(s):  
Yan-fang Xu ◽  
Hao Liu ◽  
Xiao-jiu Li ◽  
Wei-min Kang ◽  
Bo-wen Cheng ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Mixed Electrolyte ◽  
Interpore Distance ◽  
Novel Method ◽  
Ordered Porous

Focused ion beam patterning of III–V crystals at low temperature: A method for improving the ion-induced defect localization

2000 ◽  
Vol 18 (6) ◽  
pp. 3162 ◽  
Author(s):  
M. Schneider ◽  
J. Gierak ◽  
J. Y. Marzin ◽  
B. Gayral ◽  
J. M. Gérard
Keyword(s):  
Low Temperature ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Defect Localization ◽  
Ion Beam Patterning

Ion-beam pore opening of porous anodic alumina: The formation of single nanopore and nanopore arrays

2009 ◽  
Vol 63 (3-4) ◽  
pp. 457-460 ◽  
Author(s):  
Mickael Lillo ◽  
Dusan Losic
Keyword(s):  
Ion Beam ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Nanopore Arrays ◽  
Pore Opening
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