Results 101 to 110 of about 15,988 (296)

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Gyrokinetic electron acceleration in the force-free corona with anomalous resistivity

, 2006
We numerically explore electron acceleration and coronal heating by dissipative electric fields. Electrons are traced in linear force-free magnetic fields extrapolated from SOHO/MDI magnetograms, endowed with anomalous resistivity ($\eta$) in localized ...
Alissandrakis, Amari, Arzner, Arzner, Arzner, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Aulanier, Aulanier, Benz, Benz, Brizard, Chiu, Dmitruk, Dmitruk, Dreicer, Dumont, Fleishman, Fleishman, Fleishman, Fludra, Gallagher, Gary, Georgoulis, Giménez de Castro, Gudiksen, Güdel, K. Arzner, Karimabadi, Koch, Kotov, Kuijpers, L. Vlahos, Lee, Lin, Littlejohn, Littlejohn, Littlejohn, MacLeod, Matthaeus, Nita, Nobile, Parker, Parker, Parker, Petrie, Press, Saint-Hilaire, Schlickeiser, Schumacher, Spicer, Vlahos, Wheatland   +54 more
core   +1 more source

Effect of Atomic Layer Deposition of Ultra‐Thin Oxide on Reactivity and Durability of Perovskite Oxygen Electrodes

Advanced Materials, EarlyView.
This table of contents illustrates that the mechanism for mitigating Sr segregation depends strongly on the chemistry of the coating layer. HfO2 electrostatically stabilizes the surface by lowering the surface oxygen vacancies, which serve as the driving force for Sr migration. On the other hand, Al2O3 and Fe2O3 react with segregated Sr to form Sr‐Al‐O
Jongsu Seo, SungHyun Jeon, Hyunseung Kim, San Kwak, DongHwan Oh, Bonjae Koo, Jinwook Kim, Jeong Hwan Kim, WooChul Jung   +8 more
wiley   +1 more source

Boundary condition effects on runaway electron mitigation coil modeling for the SPARC and DIII-D tokamaks

Nuclear Fusion
Extended-MHD modeling of planned Runaway Electron Mitigation Coils (REMC) for SPARC and DIII-D is performed with the NIMROD code. A coil has been designed for each machine, with the two differing in shape and location, but both having n = 1 symmetry ...
V.A. Izzo, A. Battey, R.A. Tinguely, R. Sweeney, C. Hansen   +4 more
doaj   +1 more source

Metal enrichment by radiation pressure in active galactic nucleus outflows -- theory and observations

, 2012
Outflows from active galactic nuclei may be produced by absorption of continuum radiation by UV resonance lines of abundant metal ions, as observed in broad absorption line quasars (BALQs).
Alexei Baskin, Allen, Arav, Arav, Arav, Arav, Arav, Arav, Arav, Ari Laor, Baskin, Becker, Brandt, Brandt, Chelouche, Chelouche, Chelouche, Cottis, Crenshaw, Cresci, de Kool, Di, Diamond-Stanic, Dietrich, Elvis, Everett, Fabian, Ferland, Ferland, Gallazzi, Gibson, Hamann, Hamann, Hamann, Hamann, Hamann, Hamann, Jannuzi, Jones, Junkkarinen, Knigge, Korista, Kulsrud, Kurosawa, Kwan, Königl, Lamers, Laor, Laor, Molina, Moll, Morton, Murray, Owocki, Proga, Proga, Proga, Proga, Proga, Reeves, Reichard, Rodríguez, Rodríguez Hidalgo, Rybicki, Scaringi, Schneider, Shakura, Shen, Spitzer, Springmann, Stocke, Telfer, Vitello, Wang, Weymann, Wu, York, Yuan, Zaritsky   +78 more
core   +1 more source

Models of primary runaway electron distribution in the runaway vortex regime

Physics of Plasmas, 2017
A number of recent numerical calculations have shown the formation of a bump in runaway electron (RE) energy distribution by taking into account the synchrontron radiational damping force due to RE's gyromotions. Here, we present a detailed examination on how the bump location changes at different pitch-angles and the characteristics of the RE pitch ...
Zehua Guo, Xian-Zhu Tang, Christopher J. McDevitt   +2 more
openaire   +2 more sources

Porosity Engineering of MXene Architectures: Toward High‐Performance Aqueous Electrochemical Energy Storage

Advanced Materials, EarlyView.
This review systematically summarizes recent advances in porosity engineering of MXenes, with a focused discussion on their structure‐governed energy storage properties. A critical analysis of structure–property relationships is presented across alkali‐ion batteries, multivalent‐ion batteries, and supercapacitors.
Shude Liu, Jieming Chen, Xue Peng, Huilin Zhang, Ling Kang, Ming Ma, Zhaoling Li, Yusuke Yamauchi, Bin Ding   +8 more
wiley   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

A simple model of current ramp-up and ramp-down in tokamaks

Nuclear Fusion
A simple model of the ramp-up and ramp-down of the toroidal current in a tokamak plasma is developed. Faraday’s law of electric induction is found to limit how rapidly the current can be safety ramped up or down.
Richard Fitzpatrick
doaj   +1 more source

Molecular Clouds as Cosmic Ray Laboratories

, 2011
We will here discuss how the gamma-ray emission from molecular clouds can be used to probe the cosmic ray flux in distant regions of the Galaxy and to constrain the highly unknown cosmic ray diffusion coefficient. In particular we will discuss the GeV to
Aharonian, Felix A., Casanova, Sabrina, Fukui, Yasuo, Gabici, Stefano, Jones, David I., Kawamura, Akiko, Onishi, Toshikazu, Rowell, Gavin, Sano, Hidetoshi, Torii, Kazufumi, Volpe, Francesca, Yamamoto, Hiroaki   +11 more
core   +1 more source