Results 61 to 70 of about 89,033 (293)

An Ionization Instability and the Base of the Corona

The Astrophysical Journal, 2002
A chromosphere of partially ionized atoms in a turbulent, magnetic, solar-type star may be subject to a thermal instability due to ionization, which we propose in this paper. The instability occurs when changing magnetic fields cause ion heating so that a proton-electron pair are heated preferentially with respect to neutral atoms.
openaire   +1 more source

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Long-term Quasiperiodicity in LMXB 4U 1636–536

The Astrophysical Journal, 2023
We present the results of the low-mass X-ray binary 4U 1636–536 study. We performed a temporal analysis of all available RXTE/All-Sky Monitor, RXTE/Proportional Counter Array, Swift/Burst Alert Telescope, and MAXI data collected until the middle of 2022.
Mateusz Wiśniewicz, Dorota Gondek-Rosińska, Agnieszka Słowikowska, Andrzej Zdziarski, Agnieszka Janiuk   +4 more
doaj   +1 more source

Short Circuits in Thermally Ionized Plasmas: A Mechanism for Intermittent Heating of Protoplanetary Disks

, 2012
Many astrophysical systems of interest, including protoplanetary accretion disks, are made of turbu- lent magnetized gas with near solar metallicity. Thermal ionization of alkali metals in such gas exceeds non-thermal ionization when temperatures climb ...
Alexander Hubbard, Balbus, Beckwith, Chandrasekhar, Colin P. McNally, Ebel, Fleming, Flock, Glassgold, Hartmann, Hirose, Lazerson, Malfait, Malyshkin, McNally, McNally, Menou, Mordecai-Mark Mac Low, Muranushi, Oishi, Parker, Pilipp, Romanova, Sano, Sargent, Scott, Shakura, Turner, Umebayashi, Velikhov, Waelkens   +30 more
core   +1 more source

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

Dynamics of Protoplanetary Disks

, 2011
Protoplanetary disks are quasi-steady structures whose evolution and dispersal determine the environment for planet formation. I review the theory of protoplanetary disk evolution and its connection to observations.
Lubow SH, Philip J. Armitage, Spitzer L.
core   +1 more source

From Wafers to Electrodes: Transferring Automatic Optical Inspection (AOI) for Multiscale Characterization of Smart Battery Manufacturing

Advanced Functional Materials, EarlyView.
Automat optical inspection (AOI) techniques in semiconductor fabrication can be leveraged in battery manufacturing, enabling scalable detection and analysis of electrode‐ and cell‐level imperfections through AI‐driven analytics and a digital‐twin framework.
Jianyu Li, Ertao Hu, Wei Wei, Feifei Shi
wiley   +1 more source

Stability of black hole accretion disks

, 2012
We discuss the issues of stability of accretion disks that may undergo the limit-cycle oscillations due to the two main types of thermal-viscous instabilities.
Czerny, Bozena, Janiuk, Agnieszka, Kunert-Bajraszewska, Magdalena, Misra, Ranjeev   +3 more
core   +1 more source

Rayleigh–Taylor instability in partially ionized prominence plasma [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe study Rayleigh–Taylor instability (RTI) at the coronal–prominence boundary by means of 2.5D numerical simulations in a single-fluid MHD approach including a generalized Ohm's law. The initial configuration includes a homogeneous magnetic field forming an angle with the direction in which the plasma is perturbed. For each field inclination we
E. Khomenko, A. Díaz, A. de Vicente, M. Collados, M. Luna   +4 more
openaire   +3 more sources