We are looking for AAO filtration membranes with pore diameters 250-400 nm (membrane thickness 5-25 um). But none of the commercial suppliers provide these specs. Are these specifications difficult to meet for this material type?
Hello Friend,
We are glad to here that you are working on similar work. I am sure the Anodic Aluminum Oxide (AAO) related research tools can play a good role for your research. Please take a look at the ultrathin AAO template which can be conveniently transferred to any substrate. We believe the highly uniform and high porosity membrane materials can be well integrated into your research. If you have any colleagues who are also interested with this, please feel free to let them know.
Features:
• Highly ordered uniform pores (selected from 20 – 400 nm)
• Straight pore channels
• High pore density (108-1010pores cm-2)
• Transparent
• Elecinsulating
Typical applications:
• Controlled nanomaterials (nanodots, nanowires, nanoholes) synthesis
• Sensors (specialized in SERS, surface plasma and etc)
• Ultrapure filtration
• Cell/bacteria analysis (excellent for fluorescent study)
• High surface area electrodes for batteries
• Support for other nanomateris, like graphene
Typical images of the three members of AAO:
If you have any questions, we will try our best to help.
Yours sincerely,
Charles
Topmembranes Technology Ltd.
Website: www.topmembrane.com
E-mail: nano@topmembranes. com
Phone: +86-0755-23505289
+86-15626158072 (Dr.Zhao)
1. Ultrathin AAO template: a controllable solution for nanomaterials
Ultrathin anodic aluminum oxide (AAO) templates are popular for fabricating large-scale ordered arrays of nanostructures (e.g., nanodots and nanoholes) on the surface of substrates (e.g. Si, sapphire, silica, ITO, FTO, etc). However, because of the small thickness (usually less than 1μm), it is of a great challenge to transfer AAO template onto substrate. Here, we have developed a facile and low cost method to allow transferring ultrathin AAO template onto any substrate in a timely manner, which can significantly improve research efficiency.
Features:
u Narrow pore size distribution, highly ordered arrangement;
u Ultrahigh pore density (108-1010 cm-2);
u Large pattern area (>1 cm2), high throughput;
u Easy to handle, cut and transfer to arbitrary substrate;
u Transparent, isolated;
u Low costs.
2.Isotropic AAO template
Isotropic AAO templates, often referring to thicker AAO to be different from ultrathin AAO membrane, are widely used for a number of different fields. Topmembranes technology is specialized to make high quality isotropic AAO templates, with uniform pore structure across the entire thickness and on both faces of the membrane. The pores are arranged hexagonally within the single domain. The translucent nature of AAO is appealing to applications in biomedical field.
3. AAO on Al substrate
AAO on Al substrate is grown on and inherently adheres to the surface of Al. At the end of the pore, there is a half-sphere shape barrier oxide layer in contact with aluminum. AAO film on Al are a convenient low-cost alternative to free-standing AAO wafers or membranes for many applications in nanofabrication, such as templated growth of uniform arrays of nanowires and nanotubes.
Technical Data
Parameters
Ultrathin AAO
Isotropic AAO
AAO on Al Substrate
Pore geometry
Trigonal, honeycomb
Interpore distance (a)
65-480nm (stock material: a = 65 nm,100nm, 125 nm, 450nm)
Pore diameter (d)
20 - 400nm
Pore depth (t)
100-1000nm
40-60μm
100nm-60μm
Pore Density
108-1010cm-2
Size
Customizable, Up to 12*12cm
Standard size
15*15mm
Circle 13mm, 25mm, 47mm
20mm*20mm
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One type of Whatman Anodisc has a 200nm pore size and I guess fits your specified thickness.
Thank you Tiara! I managed to get in touch with a company which seem to fulfill our requirement.
Hi there,
We provide researchers with low-cost mild- and hard- anodized AAO templates, having different pore lengths and diameters. Contact: [email protected]
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