Gas Permeability of a Buckypaper Membrane

Gas permeability has been measured through a carbon nanotube-based “buckypaper” membrane and through commercially available porous anodized alumina membranes with 200 nm nominal pore dimensions. Permeation relationships through the alumina membrane are consistent with Knudsen-type diffusion. Permeat...

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Bibliographic Details
Published in:Nano letters 2003-02, Vol.3 (2), p.189-192
Main Authors: Cooper, Sarah M, Chuang, Helen F, Cinke, Martin, Cruden, Brett A, Meyyappan, M
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Membranes
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Summary:Gas permeability has been measured through a carbon nanotube-based “buckypaper” membrane and through commercially available porous anodized alumina membranes with 200 nm nominal pore dimensions. Permeation relationships through the alumina membrane are consistent with Knudsen-type diffusion. Permeation behavior in the “buckypaper” membrane, however, shows a strong dependence of permeability on pressure that is not explained by typical transport mechanisms. It is suggested that elastic deformation of the membrane from the pressure differential may contribute to this behavior.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl0259131