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L'existence d'eau surrefroidie sous forme liquide à 150 K.

The existence of supercooled liquid water at 150 K.

Auteurs : SMITH R. S., KAY B. D.

Type d'article : Article

Résumé

Some theories preclude the existence of the supercooled liquid below an apparent thermodynamic singularity at 228 K; others are consistent with a continuous region of metastability from the melting point at 273 K to the glass transition temperature at 136 K. Here we determine the diffusivity of amorphous ice by studying isotope intermixing in films less than 500 nanometres thick. The magnitude and temperature dependence of the diffusivity is consistent with the idea that the amorphous solid water melts into a deeply metastable extension of normal liquid water before crystallizing at 160 K. This argues against the idea of a singularity in the supercooled regime at ambient pressure.

Détails

  • Titre original : The existence of supercooled liquid water at 150 K.
  • Identifiant de la fiche : 2000-1014
  • Langues : Anglais
  • Source : Nature - vol. 398 - n. 6730
  • Date d'édition : 29/04/1999
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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