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Freezing and Melting of Water Confined in Silica Nanopores
Author(s) -
Findenegg Gerhard H.,
Jähnert Susanne,
Akcakayiran Dilek,
Schreiber Andreas
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800616
Subject(s) - supercooling , nanopore , nucleation , neutron diffraction , materials science , mesoporous material , homogeneous , mesoporous silica , chemical engineering , melting point , sorption , chemistry , chemical physics , thermodynamics , nanotechnology , crystallography , organic chemistry , adsorption , crystal structure , physics , engineering , catalysis
In nanosized pores, liquid water can be thermodynamically stable down to temperatures well below the limit of homogeneous nucleation of bulk water (∼235 K). Studies of water in such pores therefore offer an opportunity to reveal the anomalous behavior of deeply supercooled water. Herein we focus on recent studies of the limits of freezing and melting of water in the cylindrical pores of ordered mesoporous silicas with pore diameters in the range of 2–10 nm, based on vapor sorption measurements, calorimetric studies, NMR spectroscopy and cryoporometry, and neutron diffraction studies.