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The puzzle of liquid water diffusive behaviour: recent IQENS results

Author

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  • Crupi, V.
  • Majolino, D.
  • Migliardo, P.
  • Venuti, V.

Abstract

We present recent incoherent quasi-elastic neutron scattering (IQENS) results, carried out on IN6 time-of-flight spectrometer, performed on water confined into 26Å diameter pores of nanoporous Gelsil glass, as a function of temperature. From the IQENS data analysis it turns out that there is a strong confinement effect on the water molecules by the host glass that reflects, consequentially, a hindered diffusional dynamics. The quasi-elastic response has been explained in terms of two different theoretical models: (i) the well-known Dianoux–Volino model for confined diffusion, and (ii) the MCT model typical of supercooled α-relaxing systems.

Suggested Citation

  • Crupi, V. & Majolino, D. & Migliardo, P. & Venuti, V., 2002. "The puzzle of liquid water diffusive behaviour: recent IQENS results," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 304(1), pages 59-64.
    • Handle: RePEc:eee:phsmap:v:304:y:2002:i:1:p:59-64
    DOI: 10.1016/S0378-4371(01)00532-5
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    Keywords

    Quasi-elastic scattering; Water;

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