Dynamic crossover phenomenon in confined supercooled water and its relation to the existence of a liquid-liquid critical point in water

Sow Hsin Chen, F. Mallamace, L. Liu, D. Z. Liu, X. Q. Chu, Y. Zhang, C. Kim, A. Faraone, C. Y. Mou, E. Fratini, P. Baglioni, A. I. Kolesnikov, V. Garcia-Sakai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have observed a Fragile-to-Strong Dynamic Crossover (FSC) phenomenon of the α-relaxation time and self-diffusion constant in confined supercooled water. The α-relaxation time is measured by Quasielastic Neutron Scattering (QENS) experiments and the self-diffusion constant by Nuclear Magnetic Resonance (NMR) experiments. Water is confined in 1-d geometry in cylindrical pores of nanoscale silica materials, MCM-41-S and in Double-Wall Carbon Nanotubes (DWNT). The crossover phenomenon can also be observed from appearance of a Boson peak in Incoherent Inelastic Neutron Scattering experiments. We observe a pronounced violation of the Stokes-Einstein Relation at and below the crossover temperature at ambient pressure. Upon applying pressure to the confined water, the crossover temperature is shown to track closely the Widom line emanating from the existence of a liquid-liquid critical point in an unattainable deeply supercooled state of bulk water. Relation of the dynamic crossover phenomenon to the existence of a density minimum in supercooled confined water is discussed. Finally, we discuss a role of the FSC of the hydration water in a biopolymer that controls the biofunctionality of the biopolymer.

Original languageEnglish (US)
Title of host publicationComplex Systems - 5th International Workshop on Complex Systems
Pages39-52
Number of pages14
DOIs
StatePublished - Mar 13 2008
Externally publishedYes
Event5th International Workshop on Complex Systems - Sendai, Japan
Duration: Sep 25 2007Sep 28 2007

Publication series

NameAIP Conference Proceedings
Volume982
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other5th International Workshop on Complex Systems
CountryJapan
CitySendai
Period9/25/079/28/07

Keywords

  • Density minimum of water
  • Dynamic crossover phenomenon in hydration water
  • Dynamic crossover phenomenon of confmed water
  • Liquid-liquid critical point of water
  • Quasielastic neutron scattering
  • The Widom line

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Chen, S. H., Mallamace, F., Liu, L., Liu, D. Z., Chu, X. Q., Zhang, Y., Kim, C., Faraone, A., Mou, C. Y., Fratini, E., Baglioni, P., Kolesnikov, A. I., & Garcia-Sakai, V. (2008). Dynamic crossover phenomenon in confined supercooled water and its relation to the existence of a liquid-liquid critical point in water. In Complex Systems - 5th International Workshop on Complex Systems (pp. 39-52). (AIP Conference Proceedings; Vol. 982). https://doi.org/10.1063/1.2897826