The percolation transition of hydration water: from planar hydrophilic surfaces to proteins

Details The percolation transition of hydration water: from planar hydrophilic surfaces to proteins The percolation transition of hydration water: from planar hydrophilic surfaces to proteins

2005-05-23

arxiv.org/abs/cond-mat/0505564v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, 1 table

Scientific paper

10.1103/PhysRevLett.95.247802

The formation of a spanning hydrogen-bonded network of hydration water is found to occur via a 2D percolation transition in various systems: smooth hydrophilic surfaces, the surface of a single protein molecule, protein powder and diluted peptide solution. The average number of water-water hydrogen bonds nH at the percolation threshold varies from 2.0 to 2.3, depending on temperature, system size and surface properties. Calculation of nH allows an easy estimation of the percolation threshold of hydration water in various systems, including biomolecules.

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