Electrochemical Separation of Porous Anodic Aluminum Oxide with Thick Barrier Layers
نویسندگان
چکیده
We investigated an electrochemical separation method for anodic aluminum oxide (AAO) films possessing thicker barrier layers by electrolysis in sodium chloride (NaCl) and ethylene glycol (EG) solution subsequent fabrication of through-hole AAO membranes immersion phosphoric acid (H 3 PO 4 ) solution. The with different layer thicknesses were formed on the surface anodizing sulfuric, oxalic, H solutions at up to 130 V. AAO-covered specimens immersed NaCl/EG solution, then constant voltage 10 V higher than was performed from surface. Many nanoscale paths throughout alumina initial stage electrolysis, substrate electrochemically dissolved through these narrow during electrolysis. Although film partially fractured 80 uniformly separated As membrane aqueous after preferentially into a could be successfully obtained.
منابع مشابه
A Highly Controllable Electrochemical Anodization Process to Fabricate Porous Anodic Aluminum Oxide Membranes.
Due to the broad applications of porous alumina nanostructures, research on fabrication of anodized aluminum oxide (AAO) with nanoporous structure has triggered enormous attention. While fabrication of highly ordered nanoporous AAO with tunable geometric features has been widely reported, it is known that its growth rate can be easily affected by the fluctuation of process conditions such as ac...
متن کاملTunneling spectroscopy studies of treated aluminum oxide tunnel barrier layers
We report scanning tunneling microscopy and ballistic electron emission microscopy studies of the electronic states of the uncovered and chemisorbed-oxygen covered surface of AlOx tunnel barrier layers. These states change when chemisorbed oxygen ions are moved into the oxide by either flood gun electron bombardment or by thermal annealing. While untreated samples exhibit band tails extending t...
متن کاملAnodic aluminum oxide microchannel plates
A new material for microchannel plates (MCP) is proposed — anodic aluminum oxide. Microchannel plates made of this material may be much cheaper than with conventional lead glass MCP. Also a significantly smaller channel diameter (up to 70 nm) is easily achievable, which means better spatial resolution and the possibility to operate in strong magnetic fields. Methods and means are developed for ...
متن کاملIn situ determination of the pore opening point during wet-chemical etching of the barrier layer of porous anodic aluminum oxide: nonuniform impurity distribution in anodic oxide.
Wet-chemical etching of the barrier oxide layer of anodic aluminum oxide (AAO) was systematically investigated by using scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), and a newly devised experimental setup that allows accurate in situ determination of the pore opening point during chemical etching of the barrier oxide layer. We found that opening of the barrier oxid...
متن کاملOxygen stoichiometry and instability in aluminum oxide tunnel barrier layers
We present x-ray photoelectron spectroscopy data that show that the chemisorbed oxygen previously observed to be on the surface of thin AlOx layers formed by room temperature thermal oxidation is bound by oxygen vacancies in the oxide. Increasing the electric field across the oxide, either by overcoating with a metallic electrode, or by electron bombardment, drives this surface chemisorbed oxyg...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2023
ISSN: ['0013-4651', '1945-7111']
DOI: https://doi.org/10.1149/1945-7111/ace558