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Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes
The translational and orientational dynamics of water in carbon nanotubes has been studied by quasi-elastic neutron scattering from 300 down to 10 K. Results show that, reducing temperature below 200 K, part of this water behaves as a quasi-free rotor, that is, the orientational energy of such molec...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5361194/ https://www.ncbi.nlm.nih.gov/pubmed/28327621 http://dx.doi.org/10.1038/srep45021 |
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author | Briganti, G. Rogati, G. Parmentier, A. Maccarini, M. De Luca, F. |
author_facet | Briganti, G. Rogati, G. Parmentier, A. Maccarini, M. De Luca, F. |
author_sort | Briganti, G. |
collection | PubMed |
description | The translational and orientational dynamics of water in carbon nanotubes has been studied by quasi-elastic neutron scattering from 300 down to 10 K. Results show that, reducing temperature below 200 K, part of this water behaves as a quasi-free rotor, that is, the orientational energy of such molecules becomes comparable to the rotational energy of water in the gas phase. This novel and unique dynamic behavior is related to the appearance of water molecules characterized by a coordination number of about two, which is promoted by sub-nanometer axial confinement. This peculiar molecular arrangement allows water to show an active rotational dynamics even at temperatures as low as 10 K. The translational mobility shows a behavior compatible with the rotational one. |
format | Online Article Text |
id | pubmed-5361194 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-53611942017-03-24 Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes Briganti, G. Rogati, G. Parmentier, A. Maccarini, M. De Luca, F. Sci Rep Article The translational and orientational dynamics of water in carbon nanotubes has been studied by quasi-elastic neutron scattering from 300 down to 10 K. Results show that, reducing temperature below 200 K, part of this water behaves as a quasi-free rotor, that is, the orientational energy of such molecules becomes comparable to the rotational energy of water in the gas phase. This novel and unique dynamic behavior is related to the appearance of water molecules characterized by a coordination number of about two, which is promoted by sub-nanometer axial confinement. This peculiar molecular arrangement allows water to show an active rotational dynamics even at temperatures as low as 10 K. The translational mobility shows a behavior compatible with the rotational one. Nature Publishing Group 2017-03-22 /pmc/articles/PMC5361194/ /pubmed/28327621 http://dx.doi.org/10.1038/srep45021 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Briganti, G. Rogati, G. Parmentier, A. Maccarini, M. De Luca, F. Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title | Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title_full | Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title_fullStr | Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title_full_unstemmed | Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title_short | Neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
title_sort | neutron scattering observation of quasi-free rotations of water confined in carbon nanotubes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5361194/ https://www.ncbi.nlm.nih.gov/pubmed/28327621 http://dx.doi.org/10.1038/srep45021 |
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