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Percolation transition of hydration water at hydrophilic surfaces

Author

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  • Oleinikova, A.
  • Brovchenko, I.
  • Geiger, A.

Abstract

An analysis of water clustering is used to study the quasi-2D percolation transition of water adsorbed at planar hydrophilic surfaces. Above the critical temperature of the layering transition (quasi-2D liquid–vapor phase transition of adsorbed molecules) a percolation transition occurs at some threshold surface coverage, which increases with increasing temperature. The location of the percolation line is consistent with the existence of a percolation transition at the critical point. The percolation threshold at a planar surface is weakly sensitive to the size of the system when its lateral dimension increases from 80 to 150Å. The size distribution of the largest water cluster shows a specific two-peaks structure in a wide range of surface coverage: the lower- and higher-size peaks represent contributions from non-spanning and spanning clusters, respectively. The ratio of the average sizes of spanning and non-spanning largest clusters is about 1.8 for all studied planes. The two-peak structure becomes more pronounced with decreasing size of the planar surface and strongly enhanced at spherical surfaces.

Suggested Citation

  • Oleinikova, A. & Brovchenko, I. & Geiger, A., 2006. "Percolation transition of hydration water at hydrophilic surfaces," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 364(C), pages 1-12.
    • Handle: RePEc:eee:phsmap:v:364:y:2006:i:c:p:1-12
    DOI: 10.1016/j.physa.2005.09.049
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    Cited by:

    1. Xu, Wenxiang & Chen, Wen & Chen, Huisu & Tian, Xia & Zhao, Haitao, 2014. "Determination of overlapping degree of interfacial layers around polydisperse ellipsoidal particles in particulate composites," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 399(C), pages 126-136.

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