A nano-scale free volume perspective on the glass transition of supercooled water in confinement
We employ positron annihilation lifetime spectroscopy (PALS) to measure the temperature dependent fluctuations in a local free volume of water confined in a variety of mesoporous materials with different pore sizes and morphologies. We demonstrate that this unconventional approach can be used to pro...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/10/103030 |
| _version_ | 1797751610401619968 |
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| author | M Roussenova M A Alam S Townrow D Kilburn P E Sokol R Guillet-Nicolas F Kleitz |
| author_facet | M Roussenova M A Alam S Townrow D Kilburn P E Sokol R Guillet-Nicolas F Kleitz |
| author_sort | M Roussenova |
| collection | DOAJ |
| description | We employ positron annihilation lifetime spectroscopy (PALS) to measure the temperature dependent fluctuations in a local free volume of water confined in a variety of mesoporous materials with different pore sizes and morphologies. We demonstrate that this unconventional approach can be used to probe the dynamics and glass transition temperature, T _g , of water in confinement. In the simplest case of water confined in a 13X molecular sieve ( d = 7.4 Å), the confinement is so severe that it precludes crystallisation altogether, and we measure a T _g = 190 ± 2 K. We also show that temperature dependent PALS measurements can be used to probe the glass transition of water molecules confined in matrices with larger pore diameters (SBA-15, KIT-6 and Vycor glass), where the confinement is expected to be less severe. |
| first_indexed | 2024-03-12T16:51:02Z |
| format | Article |
| id | doaj.art-d30c671168fb4217a787e2975a4e5228 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:51:02Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-d30c671168fb4217a787e2975a4e52282023-08-08T11:20:43ZengIOP PublishingNew Journal of Physics1367-26302014-01-01161010303010.1088/1367-2630/16/10/103030A nano-scale free volume perspective on the glass transition of supercooled water in confinementM Roussenova0M A Alam1S Townrow2D Kilburn3P E Sokol4R Guillet-Nicolas5F Kleitz6H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, UKH. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, UKH. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, UKH. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, UKIndiana University Cyclotron Facility , 2401 Milo B. Sampson Lane, Bloomington, IN- 47408, USADepartment of Chemistry and Centre de recherche sur les matériaux avancés (CERMA), Laval University , 1045 Avenue de la Médecine, Québec, G1V 0A6, CanadaDepartment of Chemistry and Centre de recherche sur les matériaux avancés (CERMA), Laval University , 1045 Avenue de la Médecine, Québec, G1V 0A6, CanadaWe employ positron annihilation lifetime spectroscopy (PALS) to measure the temperature dependent fluctuations in a local free volume of water confined in a variety of mesoporous materials with different pore sizes and morphologies. We demonstrate that this unconventional approach can be used to probe the dynamics and glass transition temperature, T _g , of water in confinement. In the simplest case of water confined in a 13X molecular sieve ( d = 7.4 Å), the confinement is so severe that it precludes crystallisation altogether, and we measure a T _g = 190 ± 2 K. We also show that temperature dependent PALS measurements can be used to probe the glass transition of water molecules confined in matrices with larger pore diameters (SBA-15, KIT-6 and Vycor glass), where the confinement is expected to be less severe.https://doi.org/10.1088/1367-2630/16/10/103030supercooled waterglass transitionconfinementfree volumepositron annihilation78.70.Bj |
| spellingShingle | M Roussenova M A Alam S Townrow D Kilburn P E Sokol R Guillet-Nicolas F Kleitz A nano-scale free volume perspective on the glass transition of supercooled water in confinement New Journal of Physics supercooled water glass transition confinement free volume positron annihilation 78.70.Bj |
| title | A nano-scale free volume perspective on the glass transition of supercooled water in confinement |
| title_full | A nano-scale free volume perspective on the glass transition of supercooled water in confinement |
| title_fullStr | A nano-scale free volume perspective on the glass transition of supercooled water in confinement |
| title_full_unstemmed | A nano-scale free volume perspective on the glass transition of supercooled water in confinement |
| title_short | A nano-scale free volume perspective on the glass transition of supercooled water in confinement |
| title_sort | nano scale free volume perspective on the glass transition of supercooled water in confinement |
| topic | supercooled water glass transition confinement free volume positron annihilation 78.70.Bj |
| url | https://doi.org/10.1088/1367-2630/16/10/103030 |
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