skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Inelastic and deep inelastic neutron spectroscopy of water molecules under ultra-confinement

Conference ·

Water confined within sub-nanometer channels of silicate minerals presents an extreme case of confinement, where the restricted molecules are situated in channels whose diameter is not much larger than the water molecule itself. Recently, we discovered a new quantum tunneling state of the water molecule confined in 5 Å channels in the mineral beryl, characterized by extended proton and electron delocalization. Several peaks were observed in the inelastic neutron scattering (INS) spectra which were uniquely assigned to water quantum tunnelling. In addition, the water proton momentum distribution measured with deep inelastic neutron scattering (DINS) at 4.3 K directly showed coherent delocalization of the water protons in the ground state. The obtained average kinetic energy (EK ) of the water protons was found to be ~30% less than it is in bulk liquid water and ice phases. In the current work we present INS and DINS study of water in single crystal beryl in wider temperature range, T=5–260 K, where we observed significant increase of EK of the confined water protons with temperature increase. The obtained INS data also indicate that with increasing temperature water molecules are progressively involved in hydrogen bonding (HB) with the beryl cage, while HB is almost absent at low temperatures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1461941
Resource Relation:
Journal Volume: 1055; Conference: Neutrons Matter: International Workshop in Electron-volt Neutron Spectroscopy - Rome, , Italy - 11/7/2017 5:00:00 AM-11/8/2017 5:00:00 AM
Country of Publication:
United States
Language:
English

References (43)

Vibrational states of a water molecule in a nano-cavity of beryl crystal lattice journal June 2014
Water — an enduring mystery journal March 2008
Symmetry-breaking in the endofullerene H 2 O@C 60 revealed in the quantum dynamics of ortho and para-water: a neutron scattering investigation journal January 2014
Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764 https://doi.org/10.1016/j.nima.2014.07.029
journal November 2014
DAVE: A Comprehensive Software Suite for the Reduction, Visualization, and Analysis of Low Energy Neutron Spectroscopic Data
  • Azuah, Richard Tumanjong; Kneller, Larry R.; Qiu, Yiming
  • Journal of Research of the National Institute of Standards and Technology, Vol. 114, Issue 6 https://doi.org/10.6028/jres.114.025
journal November 2009
Evidence for an anomalous quantum state of protons in nanoconfined water journal January 2012
VESUVIO Data Analysis Goes MANTID journal December 2014
Proton dynamics in hydrogen-bonded systems journal May 2016
Water? What's so special about it? journal August 2004
Measurement of momentum distribution of lightatoms and molecules in condensed matter systems using inelastic neutron scattering journal July 2005
Anomalously large isotope effect in the glass transition of water journal November 2014
SEQUOIA: A Newly Operating Chopper Spectrometer at the SNS journal November 2010
Multiple scattering in deep inelastic neutron scattering: Monte Carlo simulations and experiments at the ISIS eVS inverse geometry spectrometer
  • Mayers, J.; Fielding, A. L.; Senesi, R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 481, Issue 1-3 https://doi.org/10.1016/S0168-9002(01)01335-3
journal April 2002
A Single Molecule of Water Encapsulated in Fullerene C60 journal July 2011
A comparison of four direct geometry time-of-flight spectrometers at the Spallation Neutron Source journal April 2014
Insights into Phases of Liquid Water from Study of Its Unusual Glass-Forming Properties journal February 2008
Vibrational Density of States of Strongly H-Bonded Interfacial Water: Insights from Inelastic Neutron Scattering and Theory journal May 2014
Quantum behavior of water nano-confined in beryl journal March 2017
Anomalous Behavior of Proton Zero Point Motion in Water Confined in Carbon Nanotubes journal December 2006
Anomalously Soft Dynamics of Water in a Nanotube: A Revelation of Nanoscale Confinement journal July 2004
Quantum Tunneling of Water in Beryl: A New State of the Water Molecule journal April 2016
Calibration of an electron volt neutron spectrometer
  • Mayers, J.; Adams, M. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 625, Issue 1 https://doi.org/10.1016/j.nima.2010.09.079
journal January 2011
Supercooled and Glassy Water journal June 2003
Characterisation of the incident beam and current diffraction capabilities on the VESUVIO spectrometer journal August 2017
THz–IR spectroscopy of single H 2 O molecules confined in nanocage of beryl crystal lattice journal October 2014
Strong Anisotropic Dynamics of Ultra-Confined Water journal August 2014
Neutron scattering lengths and cross sections journal January 1992
Water conduction through the hydrophobic channel of a carbon nanotube journal November 2001
The real topological configuration of the extra-framework content in alkali-poor beryl: A multi-methodological study journal January 2006
Quantum rotation of ortho and para-water encapsulated in a fullerene cage journal July 2012
The orientation and vibrational states of H 2 O in synthetic alkali-free beryl journal September 2000
Square ice in graphene nanocapillaries journal March 2015
Electron-volt neutron spectroscopy: beyond fundamental systems journal January 2017
Compressibility and equation of state of beryl (Be3Al2Si6O18) by using a diamond anvil cell and in situ synchrotron X-ray diffraction journal March 2015
Low-Frequency Motions of H2O Molecules in Beryl from Neutron Inelastic Scattering Data journal February 1965
Anisotropic dynamics of water ultraconfined in macroscopically oriented channels of single-crystal beryl: A multifrequency analysis journal November 2013
Vibrational states of nano-confined water molecules in beryl investigated by first-principles calculations and optical experiments journal January 2017
Formation of ordered ice nanotubes inside carbon nanotubes journal August 2001
Calculation of background effects on the VESUVIO eV neutron spectrometer journal December 2010
Single-crystal vibrational spectra of beryl and dioptase journal January 1974
Anomalous Ground State of the Electrons in Nanoconfined Water journal July 2013
Thermal expansion coefficients for indialite, emerald, and beryl journal January 1977
Quantum Behavior of Water Molecules Confined to Nanocavities in Gemstones journal June 2013

Similar Records

Effect of fine-tuning pore structures on the dynamics of confined water
Journal Article · Tue May 28 00:00:00 EDT 2019 · Journal of Chemical Physics · OSTI ID:1461941

Quantum Tunneling of Water in Beryl. A New State of the Water Molecule
Journal Article · Fri Apr 22 00:00:00 EDT 2016 · Physical Review Letters · OSTI ID:1461941

Quantum behavior of water nano-confined in beryl
Journal Article · Wed Mar 22 00:00:00 EDT 2017 · Journal of Chemical Physics · OSTI ID:1461941

Related Subjects