Pressure dependence of fragile-to-strong transition and a possible second critical point in supercooled confined water

Li Liu, Sow Hsin Chen, Antonio Faraone, Chun Wan Yen, Chung Yuan Mou

Research output: Contribution to journalArticlepeer-review

434 Citations (Scopus)

Abstract

By confining water in nanopores of silica glass, we can bypass the crystallization and study the pressure effect on the dynamical behavior in deeply supercooled state using neutron scattering. We observe a clear evidence of a cusplike fragile-to-strong (FS) dynamic transition. Here we show that the transition temperature decreases steadily with an increasing pressure, until it intersects the homogenous nucleation temperature line of bulk water at a pressure of 1600 bar. Above this pressure, it is no longer possible to discern the characteristic feature of the FS transition. Identification of this end point with the possible second critical point is discussed.

Original languageEnglish
Article number117802
JournalPhysical Review Letters
Volume95
Issue number11
DOIs
Publication statusPublished - Sep 9 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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