Results 211 to 220 of about 86,100 (274)

Isostructural phase transition, quasielastic neutron scattering and magnetic resonance studies of a bistable dielectric ion-pair crystal [(CH3)2NH2]2KCr(CN)6.

Dalton Transactions, 2019
We have synthesised and characterised a novel organic-inorganic hybrid crystal, [(CH3)2NH2]2KCr(CN)6. The thermal DSC, TMA, DTG and DTA analyses indicate two solid-to-solid structural phase transitions (PTs).
M. Rok, G. Bator, B. Zarychta, B. Dziuk, J. Repeć, W. Medycki, M. Zamponi, G. Usevičius, M. Šimėnas, J. Banys   +9 more
semanticscholar   +1 more source

Solution Structure and Conformational Flexibility in the Active State of the Orange Carotenoid Protein: Part II: Quasielastic Neutron Scattering.

Journal of Physical Chemistry B, 2019
Orange Carotenoid Proteins (OCPs), which are protecting cyanobacterial light-harvesting antennae from photodamage, undergo a pronounced structural change upon light absorption.
M. Golub, M. Moldenhauer, F. Schmitt, W. Lohstroh, E. Maksimov, T. Friedrich, J. Pieper   +6 more
semanticscholar   +1 more source

A Quasielastic Neutron Scattering Study of Water Diffusion in Model Anion Exchange Membranes over Localized and Extended Volume Increments

Journal of Physical Chemistry C, 2019
Anion exchange membranes provide the basis for potentially more cost-effective fuel cells, electrochemical energy conversion, and energy storage. The membranes consist of a polymer domain with tethered cationic side groups and a pervading aqueous domain ...
J. Melchior, N. Jalarvo
semanticscholar   +1 more source

Neutron quasielastic scattering by (CH3NH3)5Bi2Cl11

Physica B: Condensed Matter, 1997
Abstract (CH3NH3)+-cation rotation in crystalline (CH3NH3)5Bi2Cl11 was studied by the QNS. The following (no doubt simplified) models were considered: 1. 1. All cations are equivalent and rotate as a whole around C-N axes 2. 2. Majority of cations behave as in point (1) and the remaining ones do not move (for the neutron observation window).
R Jakubas, J.A Janik, J Krawczyk, J Mayer, T Stanek, O Steinsvoll   +5 more
openaire   +1 more source

Dynamics of Hydride Ions in Metal Hydride-Reduced BaTiO3 Samples Investigated with Quasielastic Neutron Scattering

Journal of Physical Chemistry C, 2018
Perovskite-type oxyhydrides, BaTiO3–xHx, have been recently shown to exhibit hydride-ion (H–) conductivity at elevated temperatures, but the underlying mechanism of hydride-ion conduction and how it depends on temperature and oxygen vacancy concentration
Carin Eklöf-Österberg, Reji Nedumkandathil, U. Häussermann, A. Jaworski, A. J. Pell, M. Tyagi, N. Jalarvo, B. Frick, A. Faraone, M. Karlsson   +9 more
semanticscholar   +1 more source

Quasielastic neutron scattering in condensed oxygen

Physica B: Condensed Matter, 1992
The quasielastic spectra of liquid and plastic-crystalline oxygen are shown to be dominated by the magnetic response. An approximate separation of the nuclear and magnetic responses from the total, unpolarized neutron double differential cross-sections is achieved by means of a subtraction of the structural contributions calculated from a Molecular ...
A. Chahid, M. García-Hernández, F.J. Bermejo, J.L. Martínez, E. Enciso, F.J. Mompean   +5 more
openaire   +1 more source

Point-Defect Diffusion from Coherent Quasielastic Neutron Scattering

Physical Review Letters, 1985
We outline a theory which suggests that the dynamics of point defects in crystals can be studied by coherent quasielastic neutron scattering. The theory assumes that the surrounding lattice distortion follows each defect instantaneously, and that the distortion fields of different defects can be linearly superposed.
, Gillan, , Wolf
openaire   +2 more sources

Dynamics of collagen hydration by quasielastic neutron scattering

Physica B: Condensed Matter, 2000
Abstract QENS spectra from 52% H 2 O-hydrated collagen fibres ( T =276–321 K) were modelled by three-component scattering laws including small central peak broadenings. These give diffusion coefficients for mobile H 2 O of ∼5×10 −6  cm 2 /s, with activation energy ∼2 kcal/mol. The broad components relate to localised modes.
Middendorf, H.D., Traore, A., Foucat, Loic, Renou, J.P., Ferrand, M.   +4 more
openaire   +2 more sources

Inelastic and quasielastic neutron scattering

Current Opinion in Solid State and Materials Science, 1997
Inelastic neutron scattering is a technique for measuring the dynamics of condensed matter on a microscopic scale. Several dynamical regimes can be probed, including atomic momentum distributions, vibrations, and relaxation phenomena. Recent work has been carried out to investigate the dynamics of disordered materials.
openaire   +1 more source

Bayesian analysis of quasielastic neutron scattering data

Physica B: Condensed Matter, 1992
We consider the analysis of quasielastic neutron scattering data from a Bayesian point-of-view. This enables us to use probability theory to assess how many quasielastic components there is most evidence for in the data, as well as providing an optimal estimate of their parameters.
D.S. Sivia, C.J. Carlile, W.S. Howells, S. König   +3 more
openaire   +1 more source