Nano Archive

Surface modification of nanoporous alumina membranes by plasma polymerization

Losic, Dusan and Cole, Martin A. and Dollmann, Bjoern and Vasilev, Krasimir and Griesser, Hans J. (2008) Surface modification of nanoporous alumina membranes by plasma polymerization. NANOTECHNOLOGY, 19 (24).

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The deposition of plasma polymer coatings onto porous alumina (PA) membranes was investigated with the aim of adjusting the surface chemistry and the pore size of the membranes. PA membranes from commercial sources with a range of pore diameters ( 20, 100 and 200 nm) were used and modified by plasma polymerization using n-heptylamine ( HA) monomer, which resulted in a chemically reactive polymer surface with amino groups. Heptylamine plasma polymer (HAPP) layers with a thickness less than the pore diameter do not span the pores but reduce their diameter. Accordingly, by adjusting the deposition time and thus the thickness of the plasma polymer coating, it is feasible to produce any desired pore diameter. The structural and chemical properties of modified membranes were studied by scanning electron microscopy (SEM), atomic force microscopy (AFM) and x-ray electron spectroscopy (XPS). The resultant PA membranes with specific surface chemistry and controlled pore size are applicable for molecular separation, cell culture, bioreactors, biosensing, drug delivery, and engineering complex composite membranes.

Item Type:Article
Subjects:Biomedical Science > Nanobiotechnology
Material Science > Nanochemistry
Biomedical Science > Nanomedicine
ID Code:1335
Deposited By:Anuj Seth
Deposited On:09 Dec 2008 15:03
Last Modified:16 Jan 2009 14:33

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