Results 41 to 50 of about 149,678 (250)

Beyond Rattling: Tetrahedrites as Incipient Ionic Conductors

Advanced Materials, Volume 35, Issue 44, November 2, 2023., 2023
In tetrahedrite, copper ions are mobile at temperatures of 200 K or above, but confined to cages within the crystal structure. The localized diffusional jumps of the copper ions within a confined octahedral environment are effective at suppressing thermal conduction. This work reveals that tetrahedrite behaves as an incipient ionic conductor.
Shriparna Mukherjee, David J. Voneshen, Andrew Duff, Pooja Goddard, Anthony V. Powell, Paz Vaqueiro   +5 more
wiley   +1 more source

Effect of Intracrystalline Silanol Defects on the Diffusivity of Benzene in Silicalite Zeolite 

Chemie Ingenieur Technik, Volume 95, Issue 11, Page 1768-1776, November 2023., 2023
Abstract Intracrystalline zeolite silanol defect groups (≡SiOH) were modelled in silicalite (silica ZSM‐5, MFI) using experimental data. We make a molecular dynamics study on the self‐diffusivity of benzene in silicalite with defects. The simulations at three different loadings (1, 3 and 5 benzene per unit cell) and temperatures (298, 348 and 398 K ...
Alechania Misturini, Omer F. Altundal, Pablo García-Aznar, Sara Kariminasab, German Sastre   +4 more
wiley   +1 more source

Probing Water Diffusion Inside Crystals of AlPO‐5 by PFG NMR and IRM for Heat Storage Applications 

Chemie Ingenieur Technik, Volume 95, Issue 11, Page 1748-1757, November 2023., 2023
The combination of pulsed field gradient NMR and infrared microimaging enables the quantification of water diffusion inside channels of ALPO‐5 aluminophosphate on an industry‐relevant length scale for a rational design of heat exchangers utilizing the principle of molecular sorption and nanoporous materials.
Muslim Dvoyashkin, Christian Chmelik, Thomas Nonnen, Ralph Hermann, Margarita Russina, Roger Gläser   +5 more
wiley   +1 more source

Recent Developments in Kramers’ Theory of Reaction Rates

ChemPhysChem, Volume 24, Issue 16, August 15, 2023., 2023
Illustration of Kramers’ turnover theory for surface diffusion. Escape rate is plotted as a function of the scaled friction for a cosine potential simulating the one‐dimensional motion of Na atoms on a Cu(001) lattice at surface temperature T=110 K.
Eli Pollak, Salvador Miret‐Artés
wiley   +1 more source

Concentration‐dependent diffusion of unlabeled protein within an in vitro hyaluronic acid matrix

Biotechnology and Bioengineering, Volume 120, Issue 8, Page 2326-2332, August 2023., 2023
Representative diffusion experiment (n = 3 injections, 20 μL) for bovine serum albumin at 60 min. Abstract Diffusion and movement of subcutaneously injected biologics and high‐concentration immunoglobulin G (IgG) therapeutics away from the injection site and through the subcutaneous (SC) tissue may be concentration dependent.
Antonio C. F. dos Santos, Adib Ahmadzadegan, Eduardo Ximenes, Pavlos Vlachos, Arezoo Ardekani, Shiven Kapur, Vince Corvari, Michael R. Ladisch   +7 more
wiley   +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

Role of Magnetic Defects in Tuning Ground States of Magnetic Topological Insulators

Advanced Materials, Volume 35, Issue 21, May 25, 2023., 2023
Inelastic neutron scattering measurements reveal the formation of linear Mn–Te–Mn antiferromagnetic dimers in Mn‐doped Sb2Te3, following the Goodenough–Kanamori superexchange rule. Although the system is magnetically dilute, the experiments identify ferromagnetic dimers and correlations in the interblock across the van der Waals gap. These interactions
Farhan Islam, Yongbin Lee, Daniel M. Pajerowski, JinSu Oh, Wei Tian, Lin Zhou, Jiaqiang Yan, Liqin Ke, Robert J. McQueeney, David Vaknin   +9 more
wiley   +1 more source

Neutron scattering study of the magnetic phase diagram of underdoped YBa(2)Cu(3)O(6+x) [PDF]

, 2010
We present a neutron triple-axis and resonant spin-echo spectroscopy study of the spin correlations in untwinned YBCO crystals with x= 0.3, 0.35, and 0.45 as a function of temperature and magnetic field.
A Ivanov, B Keimer, C T Lin, Chang J, D Haug, Dubroka A, Hinkov V, Katanin A A Sushkov O P, N B Christensen, P Bourges, Sachdev S, Singh D J Mazin I I, T Keller, Timusk T, V Hinkov, Y Sidis, Zabolotnyy V B   +16 more
core   +4 more sources

Quasielastic small-angle neutron scattering from heavy water solutions of cyclodextrins [PDF]

The Journal of Chemical Physics 134, 024518 (2011), 2017
We present a model for quasielastic neutron scattering (QENS) by an aqueous solution of compact and inflexible molecules. This model accounts for time-dependent spatial pair correlations between the atoms of the same as well as of distinct molecules and includes all coherent and incoherent neutron scattering contributions.
arxiv   +1 more source

How sensitive are protein hydration shells to electrolyte concentration and protein composition? [PDF]

Protein Sci
Abstract Proteins of obligate halophilic organisms have an unusually high number of acidic amino acids, thought to enable them to function in multimolar KCl environments. Clarifying the molecular scale mechanisms by which this occurs is relevant for biotechnology, to enable enzymatic synthesis of economically important small molecules in salty ...
Geraili Daronkola H, Moussa B, Millet Ó, Krenczyk O, Ortega-Quintanilla G, Petersen PB, Vila Verde A.   +6 more
europepmc   +2 more sources