Results 121 to 130 of about 3,458 (224)

On the Role of Hydrogen Bond Strength and Charge Transfer in an On‐Water Diels–Alder Reaction: Semiempirical and Free Energy Calculations

open access: yesJournal of Computational Chemistry, Volume 47, Issue 20, July 30, 2026.
Matched Diels‐Alder dienophiles at a water interface reveal that on‐water catalysis depends on hydrogen‐bond quality rather than hydrogen‐bond count. Oxygen preserves charge‐transfer coupling and lowers the free‐energy barrier, whereas sulfur disrupts this coupling and promotes an asynchronous pathway.
Andrés Henao   +3 more
wiley   +1 more source

Optical Phased Arrays on Photonic Integrated Circuit Platforms: Challenges, Opportunities, and Future Applications

open access: yesNanophotonics, Volume 15, Issue 14, 27 July 2026.
Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li   +7 more
wiley   +1 more source

A highly energy-efficient multi-core neuromorphic architecture for training deep spiking neural networks. [PDF]

open access: yesNat Commun
Li M   +18 more
europepmc   +1 more source

Space‐Time‐Coding Metasurfaces Enabling Programmable Range‐Angle‐Dependent Energy Auto‐Scanning

open access: yesNanophotonics, Volume 15, Issue 14, 27 July 2026.
This paper presents a novel energy auto‐scanning system based on a space‐time‐coding metasurface. By applying progressive time‐delayed, time‐varying phase modulation, the system generates non‐uniform, temporally evolving electromagnetic field distributions across both angle and range.
Yuzhen Chen   +3 more
wiley   +1 more source

FPGA-accelerated streaming data reduction achieving an average compression ratio over 8000 in a 17.4 kHz, 840 kpixel CITIUS detector for quasi-elastic gamma-ray scattering. [PDF]

open access: yesJ Synchrotron Radiat
Nishino H   +10 more
europepmc   +1 more source

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