Results 81 to 90 of about 192,004 (363)

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu   +5 more
wiley   +1 more source

Low-energy electron diffraction from disordered surfaces [PDF]

open access: yes, 1978
Model calculations are presented of L E E D intensities diffracted by a onedimensionally disordered overlayer adsorbed on a well ordered substrate. Multiple scattering amplitudes are calculated by an extension of Beeby's multiple scattering method ...
Moritz, Wolfgang
core   +1 more source

Thermodynamics and kinetics of ammonia-modulated reversible 2D-3D transition during GaN quantum dots formation

open access: yesNext Materials
This study investigates the reversible two-dimensional to three-dimensional (2D–3D) transition during GaN quantum dots formation, induced by ammonia flow modulation, while addressing the roles of thermal decomposition and surface energy dynamics ...
Y.E. Maidebura   +6 more
doaj   +1 more source

Atomically flat superconducting NbN thin films grown on SrTiO3 (111) by plasma-assisted MBE

open access: yesAPL Materials, 2017
Atomically flat superconducting NbN thin films have been grown on the SrTiO3 (111) substrate by plasma-assisted molecular beam epitaxy for the first time.
Guan-Yong Wang   +11 more
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

open access: yesAdvanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner   +9 more
wiley   +1 more source

Nanoscale thermal transport across an GaAs/AlGaAs heterostructure interface

open access: yesStructural Dynamics, 2020
We studied the thermal transport across a GaAs/AlGaAs interface using time-resolved Reflection High Energy Electron Diffraction. The lattice temperature change of the GaAs nanofilm was directly monitored and numerically simulated using diffusive heat ...
Matthew Gorfien   +9 more
doaj   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

open access: yesAdvanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan   +9 more
wiley   +1 more source

Epitaxy, exfoliation, and strain-induced magnetism in rippled Heusler membranes

open access: yesNature Communications, 2021
Single-crystalline membranes of functional materials enable the tuning of properties via extreme strain states; however, conventional routes for producing membranes require the use of sacrificial layers and chemical etchants, which can both damage the ...
Dongxue Du   +8 more
doaj   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

Preparation of L11-CoPt/MgO/L11-CoPt tri-layer film on Ru(0001) underlayer

open access: yesAIP Advances, 2016
A CoPt/MgO/CoPt tri-layer film is prepared on an Ru(0001) single-crystal underlayer at 300 °C by ultra-high vacuum magnetron sputtering. The growth behavior and the crystallographic properties are investigated by reflection high-energy electron ...
Mitsuru Ohtake   +4 more
doaj   +1 more source

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