Apel, Pavel Y. ; Blonskaya, Irina V. ; Lizunov, Nikolay E. ; Olejniczak, Katarzyna ; Orelovitch, Oleg L. ; Toimil‐Molares, María E. ; Trautmann, Christina (2018)
Osmotic effects in track‐etched nanopores.
In: Small, 14 (18)
doi: 10.1002/smll.201703327
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Asymmetrically etched ion-track membranes attract great interest for both fundamental and technical reasons because of a large variety of applications. So far, conductometric measurements during track etching provide only limited information about the complicated asymmetric etching process. In this paper, monitoring of osmotic phenomena is used to elucidate the initial phase of nanopore formation. It is shown that strong alkaline solutions generate a considerable osmotic flow of water through newborn conical pores. The interplay between diffusion and convection in the pore channel results in a substantially nonlinear alkali concentration gradient and a rapid change in the pore geometry after breakthrough. Similar phenomena are observed in experiments with cylindrical track-etched pores of 15-30 nm in radius. A theoretical description of the diffusion-convection processes in the pores is provided.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Apel, Pavel Y. ; Blonskaya, Irina V. ; Lizunov, Nikolay E. ; Olejniczak, Katarzyna ; Orelovitch, Oleg L. ; Toimil‐Molares, María E. ; Trautmann, Christina |
| Art des Eintrags: | Bibliographie |
| Titel: | Osmotic effects in track‐etched nanopores |
| Sprache: | Englisch |
| Publikationsjahr: | 3 Mai 2018 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Small |
| Jahrgang/Volume einer Zeitschrift: | 14 |
| (Heft-)Nummer: | 18 |
| DOI: | 10.1002/smll.201703327 |
| Kurzbeschreibung (Abstract): | Asymmetrically etched ion-track membranes attract great interest for both fundamental and technical reasons because of a large variety of applications. So far, conductometric measurements during track etching provide only limited information about the complicated asymmetric etching process. In this paper, monitoring of osmotic phenomena is used to elucidate the initial phase of nanopore formation. It is shown that strong alkaline solutions generate a considerable osmotic flow of water through newborn conical pores. The interplay between diffusion and convection in the pore channel results in a substantially nonlinear alkali concentration gradient and a rapid change in the pore geometry after breakthrough. Similar phenomena are observed in experiments with cylindrical track-etched pores of 15-30 nm in radius. A theoretical description of the diffusion-convection processes in the pores is provided. |
| Freie Schlagworte: | convection, diffusion, etching, ion track nanopores, osmotic flow |
| Zusätzliche Informationen: | Artikel-ID: 1703327 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien |
| Hinterlegungsdatum: | 29 Feb 2024 11:22 |
| Letzte Änderung: | 29 Feb 2024 11:22 |
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