Density hysteresis of heavy water confined in a nanoporous silica matrix
A neutron scattering technique was developed to measure the density of heavy water confined in a nanoporous silica matrix in a temperature-pressure range, from 300 to 130 K and from 1 to 2,900 bars, where bulk water will crystalize. We observed a prominent hysteresis phenomenon in the measured densi...
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| Format: | Article |
| Language: | en_US |
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Proceedings of the National Academy of Sciences (PNAS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/69011 https://orcid.org/0000-0001-6588-2428 |
| _version_ | 1826190746222329856 |
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| author | Faraone, Antonio Kamitakahara, William A. Liu, Kao-Hsiang Mou, Chung-Yuan Leão, Juscelino B. Chang, Sung Zhang, Yang Chen, Sow-Hsin |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Faraone, Antonio Kamitakahara, William A. Liu, Kao-Hsiang Mou, Chung-Yuan Leão, Juscelino B. Chang, Sung Zhang, Yang Chen, Sow-Hsin |
| author_sort | Faraone, Antonio |
| collection | MIT |
| description | A neutron scattering technique was developed to measure the density of heavy water confined in a nanoporous silica matrix in a temperature-pressure range, from 300 to 130 K and from 1 to 2,900 bars, where bulk water will crystalize. We observed a prominent hysteresis phenomenon in the measured density profiles between warming and cooling scans above 1,000 bars. We interpret this hysteresis phenomenon as support (although not a proof) of the hypothetical existence of a first-order liquid–liquid phase transition of water that would exist in the macroscopic system if crystallization could be avoided in the relevant phase region. Moreover, the density data we obtained for the confined heavy water under these conditions are valuable to large communities in biology and earth and planetary sciences interested in phenomena in which nanometer-sized water layers are involved. |
| first_indexed | 2024-09-23T08:44:44Z |
| format | Article |
| id | mit-1721.1/69011 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:44:44Z |
| publishDate | 2012 |
| publisher | Proceedings of the National Academy of Sciences (PNAS) |
| record_format | dspace |
| spelling | mit-1721.1/690112022-09-30T10:55:36Z Density hysteresis of heavy water confined in a nanoporous silica matrix Faraone, Antonio Kamitakahara, William A. Liu, Kao-Hsiang Mou, Chung-Yuan Leão, Juscelino B. Chang, Sung Zhang, Yang Chen, Sow-Hsin Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Chen, Sow-Hsin Zhang, Yang Chen, Sow-Hsin A neutron scattering technique was developed to measure the density of heavy water confined in a nanoporous silica matrix in a temperature-pressure range, from 300 to 130 K and from 1 to 2,900 bars, where bulk water will crystalize. We observed a prominent hysteresis phenomenon in the measured density profiles between warming and cooling scans above 1,000 bars. We interpret this hysteresis phenomenon as support (although not a proof) of the hypothetical existence of a first-order liquid–liquid phase transition of water that would exist in the macroscopic system if crystallization could be avoided in the relevant phase region. Moreover, the density data we obtained for the confined heavy water under these conditions are valuable to large communities in biology and earth and planetary sciences interested in phenomena in which nanometer-sized water layers are involved. Oak Ridge National Laboratory (Clifford G. Shull fellowship) United States. Dept. of Energy (Grant DE-FG02-90ER45429) National Science Council of Taiwan (Grant NSC96-2739-M-213-001) 2012-02-02T17:59:05Z 2012-02-02T17:59:05Z 2011-06 2011-01 Article http://purl.org/eprint/type/JournalArticle 0027-8424 1091-6490 http://hdl.handle.net/1721.1/69011 Zhang, Y. et al. “Density hysteresis of heavy water confined in a nanoporous silica matrix.” Proceedings of the National Academy of Sciences 108.30 (2011): 12206-12211. Web. 2 Feb. 2012. https://orcid.org/0000-0001-6588-2428 en_US http://dx.doi.org/10.1073/pnas.1100238108 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Proceedings of the National Academy of Sciences (PNAS) PNAS |
| spellingShingle | Faraone, Antonio Kamitakahara, William A. Liu, Kao-Hsiang Mou, Chung-Yuan Leão, Juscelino B. Chang, Sung Zhang, Yang Chen, Sow-Hsin Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title | Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title_full | Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title_fullStr | Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title_full_unstemmed | Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title_short | Density hysteresis of heavy water confined in a nanoporous silica matrix |
| title_sort | density hysteresis of heavy water confined in a nanoporous silica matrix |
| url | http://hdl.handle.net/1721.1/69011 https://orcid.org/0000-0001-6588-2428 |
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