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Title: Quantum behavior of water nano-confined in beryl

Journal Article · · Journal of Chemical Physics
DOI: https://doi.org/10.1063/1.4978397 · OSTI ID:1497729
 [1]; ORCiD logo [2];  [3];  [3];  [3]
  1. Nuclear Research Center-Negev, Beer-Sheva (Israel)
  2. Ben-Gurion Univ. of the Negev, Beer-Sheva, (Israel)
  3. Pennsylvania State Univ., University Park, PA (United States)

The proton mean kinetic energy, Ke(H), of water confined in nanocavities of beryl (Be3Al2Si6O18) at 5 K was obtained by simulating the partial vibrational density of states from density functional theory based first-principles calculations. The result, Ke(H) = 104.4 meV, is in remarkable agreement with the 5 K deep inelastic neutron scattering (DINS) measured value of 105 meV. This is in fact the first successful calculation that reproduces an anomalous DINS value regarding Ke(H) in nano-confined water. The calculation indicates that the vibrational states of the proton of the nano-confined water molecule distribute much differently than in ordinary H2O phases, most probably due to coupling with lattice modes of the hosting beryl nano-cage. These findings may be viewed as a promising step towards the resolution of the DINS controversial measurements on other H2O nano-confining systems, e.g., H2O confined in single and double walled carbon nanotubes.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1497729
Journal Information:
Journal of Chemical Physics, Vol. 146, Issue 12; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (1)

Quantum Electric Dipole Lattice: Water Molecules Confined to Nanocavities in Beryl journal February 2018

Figures / Tables (12)