Results 91 to 100 of about 851,079 (386)

Electrochemical Formation of BiVO4/BiPO4 Photoanodes for Enhanced Selectivity toward H2O2 Generation

open access: yesAdvanced Functional Materials, EarlyView.
In acidic KPi, V dissolves from the BiVO4 lattice, while adsorbed phosphate reacts with the electrode under an external bias, forming a BiPO4 surface layer. This BiPO4 layer exhibits stronger bicarbonate adsorption, redirecting the water oxidation pathway toward two‐electron H2O2 production.
Kaijian Zhu   +12 more
wiley   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou   +8 more
wiley   +1 more source

Ghost-arc geochemical anomaly at a spreading ridge caused by supersized flat subduction

open access: yesNature Communications, 2023
The Southern Atlantic-Southwest Indian ridges (SASWIR) host mid-ocean ridge basalts with a residual subduction-related geochemical fingerprint (i.e., a ghost-arc signature) of unclear origin.
Guido M. Gianni   +4 more
doaj   +1 more source

Acoustic imaging and collimating by slabs of sonic crystals made from arrays of rigid cylinders in air

open access: yes, 2004
We show some new properties of the acoustic propagation in two-dimensional sonic crystals, formed by parallel rigid cylinders placed in air. The transmission through slabs of sonic crystals and the associated band structures are considered.
Chen, Liang-Shan   +2 more
core   +1 more source

COMPARATIVE STUDY OF FLAT SLAB AND CONVENTIONAL SLAB USING ETABS

open access: yes, 2022
In this thesis, the structural behavior of both flat slab and conventional slab in multi-storied building is to be compared. The rapid growth of the urban population and the consequent pressure on limited space has considerably influenced multi-storied building construction. . Two main groups according to the arrangement of slabs, beams or girders, and
J AHILA JOHNSY   +2 more
openaire   +1 more source

OCTOID: A Soft Robotic System Featuring Programmable Shape Morphing and Dynamic Structural Coloration

open access: yesAdvanced Functional Materials, EarlyView.
Inspired by octopuses, actuating legs based on soft materials are fabricated with programmed chiroptical properties and mechanical behaviors to achieve dynamic color modulation and reversible shape morphing, and these legs are developed into a modular OCTOID system.
Seung Hui Han   +8 more
wiley   +1 more source

Geodynamic subduction models constrained by deep earthquakes beneath the Japan Sea and eastern China

open access: yesScientific Reports, 2020
Details of Pacific plate subduction under the Japan Sea and associated current seismicity remain challenging. Seismic tomography reveals a continuous slab dipping at ~30° down to ~600 km, and earthquake mechanisms point to down-dip compression.
Hana Čížková   +3 more
doaj   +1 more source

Seismic structure in southern Peru: evidence for a smooth contortion between flat and normal subduction of the Nazca Plate [PDF]

open access: yes, 2015
Rapid changes in slab geometry are typically associated with fragmentation of the subducted plate; however, continuous curvature of the slab is also possible.
Clayton, Robert W., Dougherty, Sara L.
core   +2 more sources

Synergistic Compatibilization of CsPbBr3 Perovskites and HfO2 Nanocrystals for Hybrid Sensitized Nanoscintillators

open access: yesAdvanced Functional Materials, EarlyView.
Lead halide perovskite nanocrystals are promising scintillators but suffer from reabsorption losses and limited compatibility with high‐Z additives. Hybridization of CsPbBr3 nanocrystals with PbBr2‐passivated HfO2 nanoparticle sensitizers, achieved during or after synthesis, produces stable composites with maintained optical quality, improved ...
Francesco Bruni   +17 more
wiley   +1 more source

Directed diffraction without negative refraction

open access: yes, 2003
Using the FDTD method, we investigate the electromagnetic propagation in two-dimensional photonic crystals, formed by parallel air cylinders in a dielectric medium.
A. Yariv   +5 more
core   +1 more source

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