High-resolution structural study of an electrical double layer by neutron diffraction
Article Abstract:
The aqueous structure in the electrical double layer of propylammonium vermiculite gels with a clay layer spacing of 43.6 angstroms has been studied with time-of-flight (ToF) neutron diffraction. This method allows the isotopic labelling of C3D7NH3+ for C3H7NH3+ for the location of interlayer counterions and water molecules. ToF neutron diffraction also exploits the large range of the scattering vectors Q which can be measured in a single experiment. Results show majority of the counterions are separated from the clay surface by two partially ordered layers of water molecules.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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The structure of interlayer water in Li-montmorillonite studied by neutron diffraction with isotopic substitution
Article Abstract:
Research was conducted to examine the structure of interlayer water in Li-Wyoming montmorillonite hydrates using neutron diffraction with an incident wavelength of 0.5024 angstrom and both H/D and 6Li/(super nat)Li isotopic substitution. Water contents corresponding to the two layer hydrates were also examined. Results provide evidence that it is possible to use isotopic substitution with first-order differences to crystalline clay samples to derive detailed information on the interlayer water structure.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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The three-dimensional structure of water confined in nanoporous vycor glass
Article Abstract:
The three-dimensional structure of water confined in vycor- an archetypal hydrophilic porous silica glass is determined from neutron diffraction data coupled with isotopic substitution of deuterium (D) for hydrogen (H). The number of hydrogen bonds per water molecule is decreased in bulk water and also the first shell water oxygen-oxygen co-ordination number.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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