Results 31 to 40 of about 86,247 (271)

Molecular behaviour of methanol and dimethyl ether in H-ZSM-5 catalysts as a function of Si/Al ratio: a quasielastic neutron scattering study

Catalysis science & technology, 2020
Qualitative and quantitative differences are found in methanol and dimethyl ether mobility in H-ZSM-5 catalysts of varying Si/Al ratios (Brønsted acid site concentrations) using quasielastic neutron scattering.
Toyin Omojola, I. Silverwood, A. O’Malley, A. O’Malley   +3 more
semanticscholar   +1 more source

Hydrogen Dynamics in Hydrated Chitosan by Quasi-Elastic Neutron Scattering

Bioengineering, 2022
Chitosan, an environmentally friendly and highly bio-producible material, is a potential proton-conducting electrolyte for use in fuel cells. Thus, to microscopically elucidate proton transport in hydrated chitosan, we employed the quasi-elastic neutron ...
Yuki Hirota, Taiki Tominaga, Takashi Kawabata, Yukinobu Kawakita, Yasumitsu Matsuo   +4 more
doaj   +1 more source

Melting and Re-Freezing Leads to Irreversible Changes in the Morphology and Molecular-Level Dynamics of Pfizer-BioNTech COVID-19 Vaccine

Medicina, 2021
Background and Objectives: As an mRNA-based vaccine, the Pfizer-BioNTech COVID-19 vaccine has stringent cold storage requirements to preserve functionality of the mRNA active ingredient.
Eugene Mamontov, Luke L. Daemen, Eric Novak, Matthew B. Stone   +3 more
doaj   +1 more source

Data Analysis and Background Subtraction in Neutron Spin Echo Spectroscopy

Frontiers in Physics, 2021
With the constantly improving performance of neutron spin echo (NSE) spectrometers it becomes possible to perform measurements on increasingly complex samples and to study more and more delicate effects.
Ingo Hoffmann
doaj   +1 more source

From Molecules to Modules: Advanced Characterization of Membrane Systems. [PDF]

Adv Mater
Membrane technologies can enhance the efficiency and selectivity of chemical separations in energy‐water systems. Improving our understanding and design of separation membranes will require studying their properties at the molecular scale, mesoscale, and macroscale. This perspective highlights advanced characterization techniques for revealing membrane
Zhu Y, Booth AJ, Eatman JG, Kim MA, Liu Y, Sarkar B, Sengupta B, Yue X, Amanchukwu CV, Darling SB, Elam JW, Fenter P, Liu C, Hatzell KB.   +13 more
europepmc   +2 more sources

Quasielastic neutron scattering from two dimensional antiferromagnets at a finite temperature [PDF]

, 2010
We consider frequency dependence of the neutron scattering amplitude from a two-dimensional quantum antiferromagnet. It is well known that the long range order disappears at any finite temperature and hence the elastic neutron scattering Bragg peak is ...
Katanin, A. A., Sushkov, O. P.
core   +1 more source

Glassy Dynamics of Polystyrene by Quasielastic Neutron Scattering [PDF]

Macromolecules, 2011
Peer ...
Arrese-Igor, Silvia, Arbe, Arantxa, Frick, Bernhard, Colmenero de León, Juan   +3 more
openaire   +2 more sources

Proton dynamics in phosphotungstic acid impregnated mesoporous silica proton exchange membrane materials

Green Energy & Environment, 2017
Phosphotungstic acid is an excellent proton conductor that can be incorporated into porous supports, and nanocomposite proton exchange membrane materials made from mesoporous silica impregnated with phosphotungstic acid have been suggested for use in ...
Krystina Lamb, Richard A. Mole, Dehong Yu, Roland de Marco, John R. Bartlett, Sarah Windsor, San Ping Jiang, Jin Zhang, Vanessa K. Peterson   +8 more
doaj   +1 more source

Unexpected phase locking of magnetic fluctuations in the multi-k magnet USb [PDF]

, 2013
The spin waves in the multi-k antiferromagnet USb soften and become quasielastic well below the antiferromagnetic ordering temperature TN. This occurs without a magnetic or structural transition.
Blackburn, E., Caciuffo, R., Hiess, A., Lander, G. H., Lim, J. A., Magnani, N., Regnault, L.-P.   +6 more
core   +2 more sources

Investigation of the Dynamics of 1-Octene Adsorption at 293 K in a ZSM-5 Catalyst by Inelastic and Quasielastic Neutron Scattering

Journal of Physical Chemistry C, 2018
The properties of 1-octene adsorbed in zeolite ZSM-5 at 293 K are studied by means of inelastic and quasielastic neutron scatterings (INS and QENS) to investigate interactions relevant to the zeolite solid acid catalysis of fluidized catalytic cracking ...
Alexander P. Hawkins, Alexander J. O’Malley, Andrea Zachariou, Paul Collier, R. A. Ewings, Ian P. Silverwood, Russell F. Howe, Stewart F. Parker, David Lennon   +8 more
openalex   +3 more sources