Anisotropic AAO Membranes

Anisotropic Ceramic Membranes from self-organized nanoporous alumina (also known as Anodic Aluminum Oxide or AAO) contain two layers with different pore structure integrated into a monolithic membrane:

• – Support Layer –  spans most of the membrane thickness and contains large uniform pores with porosity of up to 50% to provide mechanical strength and high  permeance.
• – Active Layer – a thin layer of AAO with highly uniform pores to enable highly selective size-based (2 to 100 nm) and other types of separation with very sharp molecular weight cutoff.

Anisotropic pore structure supports size-based separation in 2 to 10 nm range, which is unavailable with isotropic AAO membranes, and makes anisotropic membranes suitable for nanofiltration and ultrafiltration applications.

InRedox maintains a wide selection of nanoporous anodic alumina membranes with different sizes, pore diameters and thicknesses in stock for convenient on-line ordering and quick delivery.  AAO membrane holders designed to take full advantage of unique AAO attributes in filtration and separation are also available.

• – For use as nanotemplates in nanofabrication or other applications, visit product pages for our AAO  Wafers and Wafer Packs for more information.
• – If specifications you need are not available in the pull-down menu below for standard products, please review the general range of pore geometries for anodic alumina in the table below and contact us with your requirements.