Results 101 to 110 of about 22,956 (243)
Advanced Science, EarlyView.Planar Ag/MAPbI3 thin single‐crystal halide perovskite devices show ultralow dark current and optically tunable threshold switching. Illumination enhances the polarity‐dependent hysteresis and shifts the switching voltage, whereas temperature‐dependent measurements reveal thermally activated, contact‐limited transport, underscoring the central role of ...
Ofelia Durante +16 more
wiley +1 more source
Primordial black hole formation during slow-reheating: a review
Frontiers in Astronomy and Space SciencesIn this paper we review the possible mechanisms for the production of primordial black holes (PBHs) during a slow-reheating period in which the energy transfer of the inflaton field to standard model particles becomes effective at slow temperatures ...
Luis E. Padilla +4 more
doaj +1 more source
Gravitational Waves from Kinetic Preheating [PDF]
We study gravitational wave production during kinetic preheating after inflation with a focus on scenarios that arise in $\alpha$-attractor models where a scalar dilaton-like inflaton is kinetically coupled to a second scalar field.
Giblin Jr, John T. +2 more
core
Advanced Science, EarlyView.TAB–2TFSI enables efficient ion‐pair doping across a wide range of conjugated polymers, where the strongly oxidizing TAB core drives charge transfer, and the TFSI counterions promote favorable ionic compensation. This dicationic dopant promotes uniform dopant distribution, improves structural order, and increases carrier delocalization, establishing a ...
Juhyung Park +14 more
wiley +1 more source
Machine Learning of Temperature‐Dependent Chemical Kinetics Using Parallel Droplet Microreactors
Advanced Science, EarlyView.An integrated droplet microfluidics and machine learning framework enables high‐throughput characterization of temperature‐dependent reaction kinetics. Time‐resolved measurements from thousands of droplets train Neural ODE models that accurately predict nonlinear reaction dynamics across diverse thermal environments, bridging large‐scale ...
Mamoru Saita, Yutaka Hori
wiley +1 more source
Journal of Advanced Joining ProcessesThis study examines the effect of base material preheating on Wire Arc Direct Energy Deposition (WA-DED) of AZ61 magnesium alloy. The influence of preheating on the geometry and penetration behaviour of a single deposit was first evaluated and used to ...
Jakub Slavíček +4 more
doaj +1 more source
Advanced Science, EarlyView.Ti substitution stabilizes Co‐free high‐Ni layered oxides through both structural and electronic effects. TiO6 octahedra act as compensatory structural units that help interrupt cooperative Jahn–Teller distortion and suppress detrimental phase transitions, while the electron‐withdrawing inductive effect of Ti stabilizes the oxygen lattice. As a result,
Bixian Ying +19 more
wiley +1 more source
Hanjie xuebaoTo address the technical challenge of liquefaction cracks easily formed in the electron beam welding joints of the Mar-M247/GH4169 dissimilar superalloys, targeted finite element analysis and experimental validation were conducted.
Zhendong WU +6 more
doaj +1 more source
Advanced Science, EarlyView.A flash lamp annealing strategy using a mullite chuck enables rapid conversion of sol–gels to metal oxides on silicon and ultra‐thin glass without extra light‐absorbing layers. Direct light absorption initiates the transformation, and the low thermal conductivity of mullite promotes heat accumulation.
Zetong Li +5 more
wiley +1 more source
Advanced Science, EarlyView.This study elucidates the microstructural evolution at the material interface of Ni‐plated plain‐weave carbon fiber fabric following vacuum heat treatment at 500°C–900°C under different current densities, as well as the mechanism underlying the synergistic enhancement of electromagnetic shielding and ductility.
Wei Cheng +7 more
wiley +1 more source