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One-Dimensional Glassy Behavior of Ultraconfined Water Strings

by Paul Ben Ishai, Michelle K Kidder, Alexander I Kolesnikov, Lawrence M Anovitz
Publication Type
Journal Name
The Journal of Physical Chemistry Letters
Publication Date
Page Numbers
7798 to 7804

Water is renowned for its anomalous behaviors, the majority of which can be linked to the distributed H-bond network of bulk water. Ultra-confinement of the water molecule can remove H-bonding leaving only molecular water. Such a condition exists in natural cordierite crystals, where water is trapped in a channel with a diameter of 5.7 Å, running through the center of the unit cell parallel to the c axis. We show that DSC reveals the existence of a 1-D glass linked to water in these channels. In these channels, water molecules in truncated, sparse 1-D strings can interact via dipole-dipole correlation only. Under these conditions a physical 1-D glass is formed from these strings. This highly unusual state can be explained by a modified Ising model, proposed by Semenov. This model predicts a dependence of the glass transition temperature, Tg, on the size of these domains. This is confirmed experimentally.