Publication Date:
2011-11-23
Description:
Recent papers in PNAS, here labeled I (1) and II (2), have proposed that when water confined in the porous silica matrix MCM-41-S with a 15-Å pore diameter is supercooled, it reaches a density minimum at around 200 K. The evidence for this assertion is based on the observed intensity of the (100) Bragg diffraction peak, which arises from the hexagonal arrangement of the cylindrical pores, as a function of temperature. In I, it is further found that the density profile as function of temperature shows significant hysteresis between heating and cooling at different pressures. Both results are used to...
Keywords:
Letters
Print ISSN:
0027-8424
Electronic ISSN:
1091-6490
Topics:
Biology
,
Medicine
,
Natural Sciences in General