Results 11 to 20 of about 86,247 (271)

Dynamics studied by Quasielastic Neutron Scattering (QENS) [PDF]

Adsorption, 2021
AbstractQuasielastic neutron scattering (QENS) allows measurement of the molecular displacements in time and space, from pico- to tens of nanoseconds and from Ångstroms to nanometers, respectively. The method probes dynamics from fast vibrational modes down to slow diffusive motion.
M. Kruteva
openaire   +3 more sources

Quasielastic neutron scattering in biology: Theory and applications [PDF]

Biochimica et Biophysica Acta (BBA) - General Subjects, 2017
Neutrons scatter quasielastically from stochastic, diffusive processes, such as overdamped vibrations, localized diffusion and transitions between energy minima. In biological systems, such as proteins and membranes, these relaxation processes are of considerable physical interest.
Derya, Vural, Xiaohu, Hu, Benjamin, Lindner, Nitin, Jain, Yinglong, Miao, Xiaolin, Cheng, Zhuo, Liu, Liang, Hong, Jeremy C, Smith   +8 more
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Emergence of a Hidden Magnetic Phase in LaFe11.8Si1.2 Investigated by Inelastic Neutron Scattering as a Function of Magnetic Field and Temperature

Advanced Physics Research
The NaZn13 type itinerant magnet LaFe13−xSix has seen considerable interest due to its unique combination of large magnetocaloric effect and low hysteresis.
Kelly Morrison, Joseph J. Betouras, Guru Venkat, Russell A. Ewings, Andrew J. Caruana, Konstantin P. Skokov, Oliver Gutfleisch, Lesley F. Cohen   +7 more
doaj   +2 more sources

Hydration‐ and Temperature‐Dependent Rotational Dynamics and Water Diffusion in Nanocellulose

Small Structures
Nanocellulose is a promising alternative to fossil‐derived materials, but its development is hindered by a limited understanding of cellulose–water interactions.
Agnes Åhl, Aleksander Jaworski, Elisabetta Nocerino, Matilda Andersson, Mika H. Sipponen, Fanni Juranyi, Lennart Bergström   +6 more
doaj   +2 more sources

Comparing ammonia diffusion in NH₃-SCR zeolite catalysts: a quasielastic neutron scattering and molecular dynamics simulation study

Physical Chemistry, Chemical Physics - PCCP, 2018
The diffusion of ammonia in the small pore zeolite and potential commercial NH3-SCR catalyst levynite (LEV) was measured and compared with its mobility in the chabazite (CHA) topology (more established in NOx abatement catalysis), using quasielastic ...
Alexander J. O’Malley, Misbah Sarwar, Jeff Armstrong, C. Richard A. Catlow, Ian P. Silverwood, A. York, Ian S. Hitchcock   +6 more
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Aminopolymer Mobility and Support Interactions in Silica-PEI Composites for CO₂ Capture Applications: A Quasielastic Neutron Scattering Study

Journal of Physical Chemistry B, 2017
Adam Holewinski, Miles A. Sakwa‐Novak, Jan‐Michael Y. Carrillo, Matthew E. Potter, Nathan C. Ellebracht, Gernot Rother, Bobby G. Sumpter, Christopher W. Jones   +7 more
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SHERPA: A Spectrometer with High Energy Resolution and Polarisation Analysis [PDF]

EPJ Web of Conferences, 2022
SHERPA is a proposed quasielastic neutron spectrometer with polarisation analysis, intended to replace the ageing Iris instrument at the ISIS neutron and muon source. In this paper we present a concept of the instrument along with Monte-Carlo simulations
Nemkovski Kirill, Bewley Robert, García Sakai Victoria, Nilsen Gøran Jan, Perrichon Adrien, Silverwood Ian   +5 more
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Comparison of time-of-flight and MIEZE neutron spectroscopy of H₂O. [PDF]

J Appl Crystallogr
We report a comparison of modulation of intensity with zero effort (MIEZE), a neutron spin–echo technique, and neutron time‐of‐flight spectroscopy, a conventional neutron scattering method. The basis of this comparison is provided by measurements performed on pure water under the same measurement conditions.We report a comparison of modulation of ...
Beddrich L, Jochum JK, Bender P, Spitz L, Wendl A, Franz C, Busch S, Juranyi F, Pfleiderer C, Soltwedel O.   +9 more
europepmc   +2 more sources

Effect of Halide Variations on Cation Dynamics in MAPbX₃ (X = Cl, Br, and I). [PDF]

Small
This study uncovers the pivotal role of halide composition in dictating MA cation dynamics in MAPbX3 (X = Cl, Br, and I). MAPbCl3 exhibits the earliest and broadest onset of threefold MA rotation with the lowest activation energy, driven by pronounced octahedral distortions and reduced steric hindrance from the smaller Cl⁻ ion.
Sharma VK, Mohanty A, Sakai VG, Tyagi M, Sarma DD.   +4 more
europepmc   +2 more sources

Determining the relaxation time from a temperature-dependent scan of the neutron spin-echo signal amplitude [PDF]

EPJ Web of Conferences, 2022
Temperature-dependent scans of the neutron scattering intensity are commonly employed in high energy-resolution quasielastic measurements. Besides serving as a useful diagnostic tool for identifying the temperature range that could give rise to a ...
Mamontov Eugene, Zolnierczuk Piotr
doaj   +1 more source