Freezing and melting of water confined in silica nanopores.
In nanosized pores, liquid water can be thermodynamically stable down to temperatures well below the limit of homogeneous nucleation of bulk water ( approximately 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.
Findenegg
Gerhard H
GH
Institut für Chemie, Stranski Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Berlin, Germany. findenegg@chem.tu-berlin.de
Jähnert
Susanne
S
Akcakayiran
Dilek
D
Schreiber
Andreas
A
D002623:Chemistry Techniques, Analytical / Q000379:methods; D005615:Freezing; D043942:Nanotubes; D044367:Phase Transition; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D014867:Water; D012822:Silicon Dioxide