Electrosurface properties of poly(ethylene terephtalate) track membranes

Березкин, В. В.; Volkov, V. I.; Киселева, О. А.; Митрофанова, Н. В.; Соболев, В. Д.

doi:10.1016/s0001-8686(03)00054-x

Cited by 21 publications

(19 citation statements)

References 7 publications

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“…21 However, we did not find systematic dependence on the nanopore radius in our measurement when the radii were ranged from 60 to 150 nm. At a concentration of 0.01M, s was in the range from −0.02 to −0.01 C / m 2 .…”

Section: Resultscontrasting

confidence: 61%

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Xue

Xie

et al. 2009

Biomicrofluidics

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Surface charge is one of the most important properties of nanopores, which determines the nanopore performance in many practical applications. We report the surface charge densities of track-etched nanopores, which were obtained by measuring the streaming current and pore conductance, respectively. Experimental results reveal that surface charge densities depend significantly on the salt concentrations. In addition the values obtained with the pore conductance were always several times higher than those calculated with the streaming current, and the gel-like surface layer on the nanopore was considered to be responsible for this discrepancy.

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Section: Resultscontrasting

confidence: 61%

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Xue

Xie

et al. 2009

Biomicrofluidics

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“…Because of the etching, carboxyl groups are produced on the interior surface and in the loosened layer nearby the pore wall. The dissociation of the carboxyl groups in aqueous solutions leads to the appearance of negative charges on the track pore surface [11]. This gives the opportunity to passivate the inner surface of the pores with species that can react with carboxyl groups.…”

Section: Methodsmentioning

confidence: 99%

Energy transfer in complexes of water-soluble quantum dots and chlorin e6 molecules in different environments

Martynenko

Орлова

Маслов

et al. 2013

Beilstein J. Nanotechnol.

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SummaryThe photoexcitation energy transfer is found and investigated in complexes of CdSe/ZnS cationic quantum dots and chlorin e6 molecules formed by covalent bonding and electrostatic interaction in aqueous solution and in porous track membranes. The quantum dots and chlorin e6 molecules form stable complexes that exhibit Förster resonance energy transfer (FRET) from quantum dots to chlorin e6 regardless of complex formation conditions. Competitive channels of photoexcitation energy dissipation in the complexes, which hamper the FRET process, were found and discussed.

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“…A rigid porous PTFE support of thickness 5 mm (Figure a) helped to maintain the membrane without strong deformation at high pressures. Pictures which illustrate the structure of such membranes can be found elsewhere 1 (a) Experimental cell for streaming potential measurements through pores of track-etched membranes.…”

Section: Methodsmentioning

confidence: 99%

Streaming Potential in Cylindrical Pores of Poly(ethylene terephthalate) Track-Etched Membranes: Variation of Apparent ζ Potential with Pore Radius

et al. 2005

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Streaming potential variation with pressure measured through poly(ethylene terephthalate) track-etched membranes of different pore sizes led to the determination of an apparent interfacial potential zetaa in the presence of 10-2 M KCl. The variation of zetaa with the pore radius r0 is interpreted by (i) the electric double layer overlap effect and (ii) the presence of a conductive gel layer. We propose a method which integrates both effects by assuming a simple model for the conductive gel at the pore wall. We observed the following three domains of pore size: (i) r0 > 70 nm, where surface effects are negligible; (ii) approximately 17 nm < r0 < 70 nm, where the pore/solution interface could be described as a conductive gel of thickness around 1 nm; (iii) r0 < approximately 17 nm, which corresponds to the region strongly damaged by the ion beam and is not analyzed here. The first one (zeta = -36.2 mV) corresponds to the raw material when etching has completely removed the ion beam predamaged region, which corresponds to the second intermediate domain (zeta = -47.3 mV). There the conductance of the gel layer deduced from the treatment of streaming potential data was found to be compatible with the number of ionic sites independently determined by the electron spin resonance technique.

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Electrosurface properties of poly(ethylene terephtalate) track membranes

Cited by 21 publications

References 7 publications

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Energy transfer in complexes of water-soluble quantum dots and chlorin e6 molecules in different environments

Streaming Potential in Cylindrical Pores of Poly(ethylene terephthalate) Track-Etched Membranes: Variation of Apparent ζ Potential with Pore Radius

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