We investigate whether an interpretation of waters thermodynamics [Science, 319, 582 (2008)] by using analogy with the binary metal alloys l-type ordering transition or buckminsterfullerenes orientational-ordering transition has merit. On examining the heat capacity data used for the nanoconfined water, the construction of the heat capacity peak, and the number of water molecules in nanoconfinement, we find that (i) the peak had been obtained by joining the data for emulsified water with that of the nanoconfined water and (ii) only three water molecules can be fitted across the 1.1 nm diameter pores used in the study, two of which form a cylindrical shell that is hydrogen bonded to silica. The remaining connectedness of one water molecule would not produce a metal alloy-like l- transition, or cooperative motions. Therefore, there is no basis for considering such an ordering in supercooled water.
On the insights into phases of liquid water from study of its unusual glass-forming properties
Tombari E;Salvetti G;
2008
Abstract
We investigate whether an interpretation of waters thermodynamics [Science, 319, 582 (2008)] by using analogy with the binary metal alloys l-type ordering transition or buckminsterfullerenes orientational-ordering transition has merit. On examining the heat capacity data used for the nanoconfined water, the construction of the heat capacity peak, and the number of water molecules in nanoconfinement, we find that (i) the peak had been obtained by joining the data for emulsified water with that of the nanoconfined water and (ii) only three water molecules can be fitted across the 1.1 nm diameter pores used in the study, two of which form a cylindrical shell that is hydrogen bonded to silica. The remaining connectedness of one water molecule would not produce a metal alloy-like l- transition, or cooperative motions. Therefore, there is no basis for considering such an ordering in supercooled water.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
