Demuth, Dominik ; Reuhl, Melanie ; Hopfenmüller, Moritz ; Karabas, Nail ; Schoner, Simon ; Vogel, Michael (2021)
Confinement Effects on Glass-Forming Aqueous Dimethyl Sulfoxide Solutions.
In: Molecules, 2020, 25 (18)
doi: 10.26083/tuprints-00019243
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Combining broadband dielectric spectroscopy and nuclear magnetic resonance studies, we analyze the reorientation dynamics and the translational diffusion associated with the glassy slowdown of the eutectic aqueous dimethyl sulfoxide solution in nano-sized confinements, explicitly, in silica pores with different diameters and in ficoll and lysozyme matrices at different concentrations. We observe that both rotational and diffusive dynamics are slower and more heterogeneous in the confinements than in the bulk but the degree of these effects depends on the properties of the confinement and differs for the components of the solution. For the hard and the soft matrices, the slowdown and the heterogeneity become more prominent when the size of the confinement is reduced. In addition, the dynamics are more retarded for dimethyl sulfoxide than for water, implying specific guest-host interactions. Moreover, we find that the temperature dependence of the reorientation dynamics and of the translational diffusion differs in severe confinements, indicating a breakdown of the Stokes–Einstein–Debye relation. It is discussed to what extent these confinement effects can be rationalized in the framework of core-shell models, which assume bulk-like and slowed-down motions in central and interfacial confinement regions, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Demuth, Dominik ; Reuhl, Melanie ; Hopfenmüller, Moritz ; Karabas, Nail ; Schoner, Simon ; Vogel, Michael |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Confinement Effects on Glass-Forming Aqueous Dimethyl Sulfoxide Solutions |
| Sprache: | Englisch |
| Publikationsjahr: | 2021 |
| Publikationsdatum der Erstveröffentlichung: | 2020 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Molecules |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 18 |
| Kollation: | 24 Seiten |
| DOI: | 10.26083/tuprints-00019243 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/19243 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): | Combining broadband dielectric spectroscopy and nuclear magnetic resonance studies, we analyze the reorientation dynamics and the translational diffusion associated with the glassy slowdown of the eutectic aqueous dimethyl sulfoxide solution in nano-sized confinements, explicitly, in silica pores with different diameters and in ficoll and lysozyme matrices at different concentrations. We observe that both rotational and diffusive dynamics are slower and more heterogeneous in the confinements than in the bulk but the degree of these effects depends on the properties of the confinement and differs for the components of the solution. For the hard and the soft matrices, the slowdown and the heterogeneity become more prominent when the size of the confinement is reduced. In addition, the dynamics are more retarded for dimethyl sulfoxide than for water, implying specific guest-host interactions. Moreover, we find that the temperature dependence of the reorientation dynamics and of the translational diffusion differs in severe confinements, indicating a breakdown of the Stokes–Einstein–Debye relation. It is discussed to what extent these confinement effects can be rationalized in the framework of core-shell models, which assume bulk-like and slowed-down motions in central and interfacial confinement regions, respectively. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-192433 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) |
| Hinterlegungsdatum: | 03 Aug 2021 07:16 |
| Letzte Änderung: | 09 Aug 2021 07:29 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Confinement Effects on Glass-Forming Aqueous Dimethyl Sulfoxide Solutions. (deposited 03 Aug 2021 07:16) [Gegenwärtig angezeigt]
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