Structural and chemical modification of porous alumina membranes

dc.contributor.authorVelleman, Len_AU
dc.contributor.authorTriani, Gen_AU
dc.contributor.authorEvans, PJen_AU
dc.contributor.authorShapter, JGen_AU
dc.contributor.authorLosic, Den_AU
dc.date.accessioned2010-04-09T01:19:46Zen_AU
dc.date.accessioned2010-04-30T05:08:20Zen_AU
dc.date.available2010-04-09T01:19:46Zen_AU
dc.date.available2010-04-30T05:08:20Zen_AU
dc.date.issued2009-11en_AU
dc.date.statistics2009-11en_AU
dc.description.abstractStructural and chemical modification of porous anodic alumina (AAO) membranes was investigated with the aim of fine-tuning pore diameters and chemical selectivity. AAO membranes from commercial sources with pore diameters (20, 100 and 200 nm) were used as the substrate. Atomic layer deposition (ALD) of silica (SiO2) has been used for membrane structural modification using tris(tert-butoxy)silanol and trimethylaluminium as the precursor couple. By adjusting the number of ALD deposition cycles (3–20), the effective pore diameter of AAO membranes was significantly reduced to desired values (<10 nm) improving the separation properties of commercial membranes. The chemical functionalization of silica coated AAO membranes with a perfluorodecyldimethylchlorosilane (PFDS) shows that the transport and selectivity properties of silica composite AAO membranes can be varied by functionalization using silane chemistry. The hydrophobic PFDS-modified membranes showed enhanced sensitivity (flux ratio 5.52) to the transport of hydrophobic molecules (tris(2,2′-bipyridyl)dichlororuthenium(II) hexahydrate (Rubpy), over hydrophilic molecules (rose bengal (RB)). Structural and chemical properties of modified membranes were confirmed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), dynamic secondary ion mass spectrometry (DSIMS), and contact angle measurements. The resultant silica coated commercial AAO membranes with specific surface chemistry and controlled pore size are applicable for advanced molecular separation, cell culture, tissue engineering, biosensing and drug delivery. © 2009, Elsevier Ltd.en_AU
dc.identifier.citationVelleman, L., Triani, G., Evans, P. J., Shapter, J. G., & Losic, D. (2009). Structural and chemical modification of porous alumina membranes. Microporous and Mesoporous Materials, 126(1-2), 87-94. doi:10.1016/j.micromeso.2009.05.024en_AU
dc.identifier.govdoc1536en_AU
dc.identifier.issn1387-1811en_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitleMicroporous and Mesoporous Materialsen_AU
dc.identifier.pagination87-94en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.micromeso.2009.05.024en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3132en_AU
dc.identifier.volume126en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPorous materialsen_AU
dc.subjectMembranesen_AU
dc.subjectModificationsen_AU
dc.subjectLayersen_AU
dc.subjectDepositionen_AU
dc.subjectComposite materialsen_AU
dc.titleStructural and chemical modification of porous alumina membranesen_AU
dc.typeJournal Articleen_AU
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