Thermal expansion of confined water

Shuangyan Xu, George W. Scherer, T. S. Mahadevan, Stephen H. Garofalini

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39 Citations (Scopus)

Abstract

Dilatometric measurement of the thermal expansion of water in porous silica shows that the expansion coefficient increases systematically as the pore size decreases below about 15 nm. This behavior is quantitatively reproduced by molecular dynamics (MD) simulations based on a new dissociative potential. According to MD, the structure of the water is modified within ∼6Å of the pore wall, so that it resembles bulk water at a higher pressure. On the basis of this observation, it is possible to account for the measured expansion, as the thermal expansion coefficient of bulk water increases with temperature over the range considered in this study.

Original languageEnglish
Pages (from-to)5076-5083
Number of pages8
JournalLangmuir
Volume25
Issue number9
DOIs
Publication statusPublished - May 5 2009

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Xu, S., Scherer, G. W., Mahadevan, T. S., & Garofalini, S. H. (2009). Thermal expansion of confined water. Langmuir, 25(9), 5076-5083. https://doi.org/10.1021/la804061p