Results 71 to 80 of about 49,076 (222)

Non‐Monotonic Changes in the Thermal Conductivity of Conjugated Polymer Films with Increasing Levels of Chemical Doping

Advanced Functional Materials, EarlyView.
Thermal conductivity changes non‐monotonically as regioregular (RR) and regiorandom (RRa) P3HT films are doped with F4TCNQ as a function of the extent to which P3HT is doped: an increase in thermal conductivity is observed upon lightly doping P3HT compared to the undoped film, followed by a decrease in the heavily doped regime. ABSTRACT The performance
Reid W. Wilson, Xinping Shi, Diego Garcia Vidales, Abigail Slimp, Zerina Mehmedović, Alexander F. Simafranca, Eric C. Wu, Sarah H. Tolbert, Richard B. Wilson, Benjamin J. Schwartz   +9 more
wiley   +1 more source

Evidence of High-latitude Emission in the Prompt Phase of GRBs: How Far from the Central Engine are the GRBs Produced?

The Astrophysical Journal Letters
One of the difficulties in nailing down the physical mechanism of gamma-ray bursts (GRBs) comes from the fact that there has been no clear observational evidence on how far from the central engine the prompt gamma rays of GRBs are emitted.
Z. Lucas Uhm, Donggeun Tak, Bing Zhang, Judith Racusin, Daniel Kocevski, Sylvain Guiriec, Bin-Bin Zhang, Julie McEnery   +7 more
doaj   +1 more source

Effect of Optical Illumination on Bubble Nanodomains

Advanced Functional Materials, EarlyView.
Stable surface‐confined nanoscale bubble domains are created and manipulated in PMN‐PT single crystals. Under above‐bandgap illumination, these bubble nanodomains remain unchanged. However, upon illumination cessation, they rapidly expand to switch the entire crystal surface, due to the accumulation of a large reservoir of electrons at the crystal ...
Haoze Zhang, Anju Ahlawat, Richard F. Webster, Yunlong Sun, Dinesh Shukla, Danyang Wang, Jan Seidel, Alexei Gruverman, Pankaj Sharma   +8 more
wiley   +1 more source

Delayed Radio Flares in Neutrino-associated Blazars: The Case of TXS 0506+056

The Astrophysical Journal Letters
Radio flares have been postulated as being associated with the production of astrophysical neutrinos. For example, TXS 0506+056 exhibits a 2–3 yr delay between the 2017 IceCube-170922A/ γ -ray flare and a GHz radio maximum.
S. I. Stathopoulos, C. Yuan, G. Vasilopoulos, F. Testagrossa, D. Karavola, M. Petropoulou, W. Winter   +6 more
doaj   +1 more source

Ionic Precursors Transformed Into Vinyl Acetate Synthesis Catalyst via Reaction‐Driven Restructuring

Advanced Functional Materials, EarlyView.
This work demonstrates that a simple physical mixture of Pd and Au ionic precursors, KOAc promoter, and SiO2 support can transform into a highly active vinyl acetate synthesis catalyst through reaction‐driven restructuring. The results highlight reaction‐induced restructuring as an innovative and sustainable catalyst design strategy.
Byeong Jun Cha, Welman C. Elias, Hunter P. Jacobs, Kimberly N. Heck, Saghar Rezaie, Sadegh Yazdi, Kiheon Hong, Justin J. Dodson, Laiyuan Chen, Sean G. Mueller, Steven R. Alexander, Michael S. Wong   +11 more
wiley   +1 more source

Modeling the Time-variable Broadband Emission and Correlation Study of FSRQ S5 1044+71

The Astrophysical Journal
We present a detailed temporal and spectral analysis of the blazar S5 1044+71 using multiwavelength data obtained from the Fermi-LAT and Swift-XRT/UVOT telescopes.
Sajad Ahanger, Shah Zahir, Sunder Sahayanathan, Naseer Iqbal, Malik Zahoor, Aaqib Manzoor   +5 more
doaj   +1 more source

Monolithic Oxidation Enables Ultrathin Vertically Graded Tantalum Oxide for Low‐Voltage, Low‐Variability Memristive Switching

Advanced Functional Materials, EarlyView.
Monolithic UV‐ozone oxidation of Ta forms an ultrathin Ta2O5/TaOx bilayer enabling resistive switching with a vertical defect gradient. A stoichiometric surface layer over an oxygen‐deficient sublayer promotes localized filament nucleation near the top interface, enabling low‐voltage operation, and reduced cycle‐to‐cycle variability.
Seunghoon Yang, Dong Hyun Lee, Conan Weiland, Won‐Il Lee, Kim Kisslinger, Mingzhao Liu, Aswin kumar Anbalagan, Xiao Tong, Soumyajit Mandal, Nikhil Tiwale, Houk Jang, Chang‐Yong Nam   +11 more
wiley   +1 more source

Broadband Variability Analysis of the Flat-spectrum Radio Quasar PKS 0402−362 with Indications of Quasi-periodic Modulation

The Astrophysical Journal
We present a comprehensive temporal and spectral study of the flat-spectrum radio quasar (FSRQ) PKS 0402−362 using Fermi Large Area Telescope/Swift X-Ray Telescope/UVOT observations spanning from MJD 54686 to 60321.
Zeeshan Nazir, Sikandar Akbar, Zahir Shah, Athar A. Dar, Zahoor Malik   +4 more
doaj   +1 more source

Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry

Advanced Functional Materials, EarlyView.
A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming, Markus Griesbach, Ralf Moos, Lothar Kador, Anna Köhler   +4 more
wiley   +1 more source

Solar Energetic Particle Charge States and Abundances with Nonthermal Electrons

The Astrophysical Journal
An important aspect of solar energetic particle (SEP) events is their source populations. Elemental abundance enhancements of impulsive SEP events, originating in presumed coronal reconnection episodes, can be fitted to steep power laws of A / Q , where ...
Jin-Yi Lee, Stephen Kahler, John C. Raymond, Yuan-Kuen Ko   +3 more
doaj   +1 more source