Results 311 to 320 of about 2,455,001 (344)

Diffractive Synthesis of Multipole Interference States Using Low‐Index Mesoscale Dielectric Structures

open access: yesAdvanced Photonics Research, EarlyView.
Multipole interference (MPI) plays pivotal roles in electromagnetics. In optics, it has been realized typically with the Mie resonance in high‐index, deep‐subwavelength‐scale dielectric resonators. A new, diffraction‐based MPI scheme is proposed and demonstrated with low‐index, mesoscale dielectric structures.
Rabiul Islam Sikder   +2 more
wiley   +1 more source

Imaging Photonic Resonances within an All‐Dielectric Metasurface via Photoelectron Emission Microscopy

open access: yesAdvanced Photonics Research, EarlyView.
Photonic resonances within a dielectric metasurface are investigated using photoelectron emission microscopy (PEEM) and finite‐difference time‐domain simulations. An electron inelastic mean free path of 35 ± 10 nm is extracted from comparisons between microscopy and simulations.
Andrew R. Kim   +9 more
wiley   +1 more source

The Phenomenology of Strings and Clusters in the 3-d Ising Model

open access: green, 1994
Vladimir Dotsenko   +5 more
openalex   +2 more sources

Synthesis of Dibenzoxasilepine Using Ring Expansion Reaction of a Pentacoordinate Silicon Intermediate

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 6, March 18, 2025.
Abstract Dibenzoxasilepine is an important skeleton in both synthetic organic and medicinal chemistry. Here, we have succeeded in obtaining it in higher yield than the conventional method, elucidating for the first time the rearrangement tendency of the two aromatic rings during the ring expansion reaction on the cyclic pentacoordinate silicon ...
Keigo Watanabe   +7 more
wiley   +1 more source

Mg(SPh)2 as a Catalyst for Efficient Photocatalytic Alkylation Reactions of Active Methylene Compounds with Nonactivated Alkenes

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract Mg(SPh)2 has been found to be a highly active catalyst in photocatalytic alkylation reactions of active methylene compounds with nonactivated alkenes. The desired reactions proceeded smoothly to afford the corresponding alkylated products in high yields with low catalyst loadings (0.2–0.3 mol%). This protocol is applicable to a continuous‐flow
Yasuhiro Yamashita   +3 more
wiley   +1 more source

Photoinduced Catalytic Alkylation of Active Methine Compounds with Nonactivated Alkenes Using Yttrium Triflate as a Lewis Acid Catalyst

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 8, April 15, 2025.
Abstract Photoinduced catalytic alkylation reactions of active methine compounds with nonactivated alkenes have been developed using an organophotocatalyst, a metal Lewis acid, an arylthiol, and an amine base catalyst system. The alkylation reactions proceeded smoothly under ambient conditions with blue light irradiation, affording the desired products
Yasuhiro Yamashita   +4 more
wiley   +1 more source

Fully‐Printed Ion Sensor Arrays for Measuring Agricultural Nitrogen and Potassium Concentrations Using Nernstian and AI Models

open access: yesAdvanced Sensor Research, Volume 4, Issue 4, April 2025.
This study demonstrates the development of fully printed ion sensor arrays that can accurately measure nitrate, ammonium, and potassium levels in agricultural settings. By integrating artificial neural networks, these sensors outperform traditional methods, offering precise nutrient monitoring.
Payton Goodrich   +10 more
wiley   +1 more source

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