Streaming Potential in Cylindrical Pores of Poly(ethylene terephthalate) Track-Etched Membranes: Variation of Apparent ζ Potential with Pore Radius
| Autor: | V. D. Sobolev, Vladimir V. Berezkin, Vitaly I. Volkov, Philippe Dejardin, Elena N. Vasina |
|---|---|
| Přispěvatelé: | Institut Européen des membranes (IEM), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS), Department of Technical Cybernetics, Samara State University, Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), A. V. Shubnikov Institute of Crystallography (IC RAS), Russian Academy of Sciences [Moscow] (RAS), Institute of Physical Chemistry of the RAS, Karpov Institute of Physical Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Ion beam
Chemistry Mordançage Analytical chemistry Mineralogy Resonance Conductance Ionic bonding 02 engineering and technology Surfaces and Interfaces Radius 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Streaming current 0104 chemical sciences Membrane Electrochemistry [CHIM]Chemical Sciences General Materials Science 0210 nano-technology Spectroscopy ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Langmuir Langmuir, American Chemical Society, 2005, 21 (10), pp.4680-4685. ⟨10.1021/la046913e⟩ Langmuir, American Chemical Society, 2005, 21 (10), pp.4682-4685. ⟨10.1021/la046913e⟩ |
| ISSN: | 0743-7463 1520-5827 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|