Density hysteresis of heavy water confined in a nanoporous silica matrix

Yang Zhang, Antonio Faraone, William A. Kamitakahara, Kao Hsiang Liu, Chung Yuan Mou, Juscelino B. Leão, Sung Chang, Sow Hsin Chen

研究成果: 雜誌貢獻文章同行評審

93 引文 斯高帕斯(Scopus)

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.

原文英語
頁(從 - 到)12206-12211
頁數6
期刊Proceedings of the National Academy of Sciences of the United States of America
108
發行號30
DOIs
出版狀態已發佈 - 7月 26 2011
對外發佈

ASJC Scopus subject areas

  • 多學科

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