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Volume 141, 2009
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“Similarities” between confined and supercooled water

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Neutron diffraction and deep inelastic neutron scattering experiments performed on bulk stable and supercooled water are compared with the same experiments performed on water confined in silica substrates. Similarities and differences between the two cases clearly show up, as far as both microscopic structure and single proton dynamics are concerned. In particular in both supercooled bulk water and water under confinement we observe a closer average distance between first neighboring oxygen sites and shortening of the H-bonds. In contrast the number of H-bonds per molecule and the number of interstitial water molecules are severely reduced under confinement, and the second peak of the oxygen-oxygen radial distribution function is shifted to shorter distances, compared to the bulk phase. Based on these results a possible scenario for understanding changes evidenced by deep inelastic neutron scattering when water is either confined or supercooled is proposed.

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The article was received on 04 Apr 2008, accepted on 16 May 2008 and first published on 09 Sep 2008

Article type: Paper
DOI: 10.1039/B805706K
Faraday Discuss., 2009,141, 347-358

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    “Similarities” between confined and supercooled water

    M. A. Ricci, F. Bruni and A. Giuliani, Faraday Discuss., 2009, 141, 347
    DOI: 10.1039/B805706K

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