Sets of configurations selected from three molecular dynamics simulations for liquid water have been analyzed for the distribution of hydrogen-bond clusters. Two simulations correspond to water at 1 g cm-3, while the third corresponds to highly compressed water at 1.346 g cm-3. An energy criterion was adopted for existence of a hydrogen-bond between two molecules. As the cutoff value for bonding increases (becomes more permissive), a bond percolation threshold is encountered at which initially disconnected clusters suddenly produce a large space-filling random network. At least for the model studied, any chemically reasonable definition of "hydrogen- bond" leads to this globally connected structure though a few disconnected fragments inhabit its interior. Although some polygonal closures can exist, the critical percolation threshold is apparently well predicted by Flory's theory of the gel point for dendritic polymerization. © 1979 American Institute of Physics.
CITATION STYLE
Geiger, A., Stillinger, F. H., & Rahman, A. (1979). Aspects of the percolation process for hydrogen-bond networks in water. The Journal of Chemical Physics, 70(9), 4185–4193. https://doi.org/10.1063/1.438042
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