Results 61 to 70 of about 25,533 (260)

Weak discontinuity waves in n-type semiconductors with defects of dislocation

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2019
In this paper a Boillat's methodology is applied to investigate discontinuity waves of a system of quasi-linear hyperbolic partial differential equations (PDEs), describing the interactions between the electronic and dislocation fields in extrinsic ...
Maria Paola Mazzeo, Liliana Restuccia
doaj   +1 more source

Influence of Hysteresis on Magnetocaloric Performance at Cryogenic Temperatures: A Tb3Ni Case Study

Advanced Functional Materials, EarlyView.
The existence of an inverse magnetocaloric effect in metamagnetic materials at cryogenic temperatures is investigated using multiple methods. Contrary to predictions from magnetization data, neither specific heat nor pulsed‐field measurements show such a cooling effect, instead indicating irreversible heating.
Timo Niehoff, Benedikt Beckmann, Konstantin Skokov, Aritz Herrero, Alberto Oleaga, Eduard Bykov, Catalina Salazar Mejía, Marc Straßheim, Oliver Gutfleisch, J. Wosnitza, Tino Gottschall   +10 more
wiley   +1 more source

Heat equation for porous nanostructures filled by a fluid flow

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2019
In a previous paper, in the framework of extended irreversible thermodynamics with internal variables, a model for nanostructures with thin porous channels filled by a fluid flow was developed.
Liliana Restuccia, Lidia Palese, Maria Teresa Caccamo, Alessio Famà   +3 more
doaj   +1 more source

Two-dimensional fluids and their holographic duals

Nuclear Physics B, 2019
We describe the dynamics of two-dimensional relativistic and Carrollian fluids. These are mapped holographically to three-dimensional locally anti-de Sitter and locally Minkowski spacetimes, respectively.
Andrea Campoleoni, Luca Ciambelli, Charles Marteau, P. Marios Petropoulos, Konstantinos Siampos   +4 more
doaj   +1 more source

Selective Membrane for Non‐Aqueous Electrochemical Flow Cells

Advanced Functional Materials, EarlyView.
Sulfonated fixed charge functionalization is increased to improve the conductivity of a cation exchange membrane in a non‐aqueous electrochemical cell. Based on ex situ analyses, the material achieved the highest selectivity for this type of system to date.
Charles R. Leroux, Geoffrey M. Geise, Gary M. Koenig Jr   +2 more
wiley   +1 more source

Enhancing Metal‐Support Interactions of Ru Catalysts via Relaxation of Oxygen Vacancies for Hydrogen Production

Advanced Functional Materials, EarlyView.
Designing stable Ru nanoparticle catalyst remains a critical challenge in electrochemical applications. Here, a strategy is presented to stabilize Ru catalysts by leveraging Ce‐doped ZrO2 supports (ZrCeO2‐x), which enhance catalyst durability and activity through electronic metal‐support interactions and stabilized oxygen vacancies.
Mansu Kim, Jonghwan Park, Hyuk Choi, Sohui Kim, Injoon Jang, Hyun You Kim, Namgee Jung, Sung Jong Yoo, Joseph T. Hupp, Dongmok Whang   +9 more
wiley   +1 more source

Boundary conditions and extended constitutive relations for spin-flow coupling in dipolar fluids

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2019
Boundary conditions are formulated, within the framework of irreversible thermodynamics, for the velocity, the angular velocity and the dipole vector parallel to the average electric dipole moment of a streaming dipolar fluid.
Siegfried Hess
doaj   +1 more source

Chemo‐Mechanical Coupling in Hydrogels: Dynamics in the Diffusion‐Limited Regime

Advanced Functional Materials, EarlyView.
A time‐dependent continuum model is developed to capture the transient swelling dynamics of chemo‐mechanical hydrogels. By coupling chemical reactions, solvent transport, and polymer deformation, volume phase transitions, reaction kinetics, and transient mechanical instabilities are analyzed.
Yao Xiong, Aaveg Aggarwal, Monica Olvera de la Cruz   +2 more
wiley   +1 more source

Self‐Assembled Gallium Sulfide (GaS) Heterostructures Enabling Efficient Water Splitting and Selective Ammonia Sensing

Advanced Functional Materials, EarlyView.
Gallium sulfide (GaS) forms self‐assembled heterostructures with its native oxide, exhibiting high performance in water splitting and ultrasensitive and selective ammonia detection. Surface defects and controlled oxidation enhance catalytic activity and sensing response.
Danil W. Boukhvalov, Gianluca D'Olimpio, Tsotne Dadiani, Jyayasi Sharma, Ashraf Abdelrahman Assadig Elameen, Stefano Zenone, Marcin Rosmus, Bekir Gürbulak, Emir Çepni, Eduard Llobet, Elena Magnano, Federica Bondino, Songül Duman, Antonio Politano   +13 more
wiley   +1 more source

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source