Adsorption properties of cermet and track-etched poly(ethylene terephthalate) membranes

Khataibe, E. V.; Khokhlova, Tatiana D.; Трусов, Л. И.; Mchedlishvili, B. V.

doi:10.1007/s10595-005-0065-9

Cited by 2 publications

(1 citation statement)

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“…In addition, the physical-chemical properties have been well investigated [9][10][11][12]. For example, the electrokinetic behavior of track-etched membranes made from poly(ethylene terephthalate) (PET), with pore diameters between 20-580 nm, was investigated by Déjardin et al [13], and the adsorption of proteins and water-soluble dyes on track-etched PET membranes were reported by Khataibe et al [14]. It is interesting to note that the proposed mechanism of adsorption on the surface of the membranes took into account ionic, hydrophobic and hydrophilic interactions [10]; these may be exploited in porphyrin self-assembly onto similar PET substrates.…”

Section: Introductionmentioning

confidence: 99%

Ionic self-assembly of porphyrin nanostructures on the surface of charge-altered track-etched membranes

Mongwaketsi

Ndungu

Nechaev

et al. 2010

J. Porphyrins Phthalocyanines

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Track-etched polymer membranes are typically used as templates in the synthesis of various nanowires or nanotubes arrays. The unique advantages of track-etched membranes, such as uniform pore structure, excellent porosity, easily tailored pore sizes, and a well characterized surface chemistry, may find use in self-assembly strategies where colloidal nanostructures can be tethered to a suitable substrate to produce devices of interest. Meso-tetrakis(4-phenylsulfonicacid)porphyrin dihydrochloride and Sn(IV) tetrakis(4-pyridyl)porphyrin were used to synthesize ionic self-assembled porphyrin nanorods. The track-etched membranes surface charge was changed from negative to positive using polyethyleneimine. The porphyrin nanorods were either filtered through or self-assembled onto the surface of track-etched membranes. Comparisons were made with track-etched membranes modified with, and without, polyethyleneimine. Assembly of the porphyrin nanotubes only occurred on the surface of positively charged track-etched membranes, and filtration of the porphyrin nanorods produced a mesh-like structure on the surface of the membrane irrespective of the track-etched membrane pore diameter. In each case the characteristic absorbance profiles of the porphyrin nanorods was maintained. Transmission electron microscopy, scanning electron microscopy, atomic force microscopy, and UV-vis spectroscopy were used to characterize the various systems.

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