Results 71 to 80 of about 5,580 (257)

Evolutionary Dynamics of Counterhelical Magnetic Flux Ropes

The Astrophysical Journal
Upon interaction, a pair of magnetic flux ropes can merge to form a new pair, each consisting of opposite helicity along their axis. Magnetic helicity along such new structures may annihilate and release the energy of the azimuthal magnetic field.
Ying-Dong Jia, Yu Chen, Yuxi Chen, Chen Shi, Qiang Hu, Yi Qi, Hanying Wei, C. T. Russell, Elizabeth A. Jensen, Xu Zhang   +9 more
doaj   +1 more source

Tailoring Multifunctional Carbon Dots via Precursor Stoichiometry: Switching Between Solid‐State Fluorescence and Broadband Absorption Through Aggregation Control

Advanced Science, EarlyView.
Precursor stoichiometry programs the surface chemistry of carbon dots, directing their self‐assembly into distinct aggregation modes. Aldehyde‐enriched surfaces form ordered, hydrogen‐bonded assemblies that enable bright red solid‐state fluorescence, whereas amine‐rich surfaces promote compact π–π stacked aggregates with broadband visible‐light ...
Gaixia Yang, Hao Sun, Defa Hou, Fulin Yang, Yuan Zou, Bei Zhou, Lanxiang Liu, Xu Lin, Guanben Du   +8 more
wiley   +1 more source

Magnetic Field Evolution of the Solar Active Region 13664

The Astrophysical Journal Letters
Abstract On 2024 May 10–11, the strongest geomagnetic storm since 2003 November occurred, with a peak Dst index of −412 nT. The storm was caused by NOAA active region (AR) 13664, which was the source of a large number of coronal mass ejections and flares, including 12 X-class flares.
Robert Jarolim, Astrid M. Veronig, Stefan Purkhart, Peijin Zhang, Matthias Rempel   +4 more
openaire   +3 more sources

Photonic‐Enabled Energy‐Efficient Transparent Neuromorphic Computing Devices: A Review

Advanced Science, EarlyView.
Transparent photonic neuromorphic computing devices merge optics and brain‐inspired computing to overcome von Neumann bottlenecks with ultrafast, low‐energy processing. By exploiting transparent oxides, 2D materials, phase‐change materials, and hybrid heterostructures, these platforms enable photonic synapses, memory, and logic for see‐through edge ...
Shuvaraj Ghosh, Ki‐bum Lee, Junghyeon Lee, Seunghee Cho, Malkeshkumar Patel, Hangfei Li, Yu Wen, Ye Zhou, Joondong Kim   +8 more
wiley   +1 more source

Magnetically Boosted Water‐Splitting Performance in Metallic Glasses

Advanced Science, EarlyView.
A strategy for boosting water electrolysis efficiency using ultralow magnetic fields on soft‐magnetic MG wires is reported. Ni40Fe40P20 metallic glass exhibits superior overall water‐splitting performance (1.51 V @ 1000 mA cm−2) at 100 Oe, enabled by spin polarization in periodic surface magnetic domains to enhance orbital hybridization and net spin ...
Chaoqun Pei, Zheng‐Jie Chen, Yuyang Qian, Zhichao Lu, Dong Ma, Jiang Ma, Tao Feng, Jing Peng, Baoan Sun, Weihua Wang   +9 more
wiley   +1 more source

Furfuryl Alcohol‐Driven Proton Supply Enables Efficient Photocatalytic H2O2 Production Beyond Water‐Based Systems

Advanced Science, EarlyView.
A ZnIn2S4–carbon dot heterojunction enables photocatalytic H2O2 production coupled with furfuryl alcohol oxidation. In this redox system, furfuryl alcohol acts as both the electron donor and oxidation substrate, producing furoic acid with 100% selectivity and 98% conversion while supporting efficient H2O2 generation with a solar‐to‐chemical conversion (
Pengfei Bai, Ning Li, Quan Zhou, Bin Liu, Xiangqian Fan, Lei Liu, Jingkai Lin, Weijie Ren, Shengliang Hu, Huayang Zhang   +9 more
wiley   +1 more source

Linking Critical Heights in Solar Active Regions with 3D Coronal Mass Ejection Speeds: Insights from Automated and Manual Polarity Inversion Line Detection Methods

The Astrophysical Journal
In a space weather context, the most geoeffective coronal mass ejections (CMEs) are fast CMEs from Earth-facing solar active regions. These CMEs are difficult to characterize in coronagraph data due to their high speed (fewer observations), faintness ...
Harshita Gandhi, Alexander W James, Huw Morgan, Lucie Green   +3 more
doaj   +1 more source

High‐Performance Multi‐Walled Carbon Nanotubes‐Organic Passivated Si Solar Cells Enabled by Spatially Selective Harvesting of High‐Quality Sponges

Advanced Science, EarlyView.
Our work achieves an efficiency breakthrough in MWCNTs/Si solar cells by screening high‐quality pristine MWCNTs without any separation or purification processes. This breakthrough is mainly attributed to the excellent dispersibility of Nafion and the excellent hole transport property of MWCNTs:Nafion film containing charge transfer doping, passivation,
Yuke Ren, Qi Wang, Jiahe Chen, Jianan Zhang, Jianxin Guo, Dehua Yang, Bingbing Chen, Lu Zhang, Yiming Xu, Xuan Chang, Tiansheng Sun, Qing Gao, Anyuan Cao, Jianhui Chen   +13 more
wiley   +1 more source

Thermally Driven Supramolecular Chirality Evolution in Low‐Bandgap Fused‐Ring Conjugated Molecules for High‐Performance NIR Circularly Polarized Light Detection

Advanced Science, EarlyView.
A supramolecular chirality evolution strategy in chiral low‐bandgap fused‐ring conjugated molecules enables high‐performance near‐infrared (NIR) circularly polarized light photodetection. Halogen substitution and thermal annealing induce chiral amplification and hierarchical ordering. Integrated into Schottky barrier vertical transistors, the optimized
Jaeyong Ahn, Kwangmin Kim, Sangwook Lee, Seul Lee, SungHyun Hur, BongSoo Kim, Joon Hak Oh   +6 more
wiley   +1 more source

Analysis of BMR Tilt from AutoTAB Catalog: Hinting toward the Thin Flux Tube Model?

The Astrophysical Journal
One of the intriguing mechanisms of the Sun is the formation of bipolar magnetic regions (BMRs) in the solar convection zone (CZ), which are observed as regions of concentrated magnetic fields of opposite polarity on the photosphere.
Anu Sreedevi, Bibhuti Kumar Jha, Bidya Binay Karak, Dipankar Banerjee   +3 more
doaj   +1 more source