https://scholars.lib.ntu.edu.tw/handle/123456789/626241
標題: | Density hysteresis of heavy water confined in a nanoporous silica matrix | 作者: | Zhang Y Faraone A Kamitakahara W.A Liu K.-H CHUNG-YUAN MOU Leão J.B Chang S Chen S.-H. |
關鍵字: | Confined water; Equation of state; Liquid-liquid critical phenomenon | 公開日期: | 2011 | 卷: | 108 | 期: | 30 | 起(迄)頁: | 12206-12211 | 來源出版物: | Proceedings of the National Academy of Sciences of the United States of America | 摘要: | 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. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-79961039087&doi=10.1073%2fpnas.1100238108&partnerID=40&md5=ccff5ac08612ff20f47c114a9b945aa2 https://scholars.lib.ntu.edu.tw/handle/123456789/626241 |
ISSN: | 00278424 | DOI: | 10.1073/pnas.1100238108 | SDG/關鍵字: | deuterium oxide; silicon dioxide; article; astronomy; cooling; crystallization; density; hysteresis; nanopore; neutron; neutron scattering; phase transition; priority journal; signal noise ratio; spectrometry; warming |
顯示於: | 化學系 |
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