Results 71 to 80 of about 82,642 (308)

Tuning Defects in Ni‐Doped Maghemite for Enhanced Solar Driven Oxygen Evolution: Insights From Operando X‐Ray Spectroscopies

open access: yesAdvanced Science, EarlyView.
ABSTRACT Maghemite (γ$\gamma$‐Fe2${\rm Fe}_2$O3${\rm O}_{3}$) is a promising non‐precious‐metal‐containing photocatalyst for water oxidation (OER). Despite being less studied than Hematite, it offers similar corrosion resistance and a favorable band structure, along with higher conductivity and the advantage of an adaptable spinel structure.
Francesco Paparoni   +6 more
wiley   +1 more source

Growth of Low-Density Vertical Quantum Dot Molecules with Control in Energy Emission

open access: yesNanoscale Research Letters, 2010
In this work, we present results on the formation of vertical molecule structures formed by two vertically aligned InAs quantum dots (QD) in which a deliberate control of energy emission is achieved.
Fuster D   +8 more
doaj   +1 more source

Liquid-Metal-Enabled Synthesis of Aluminum-Containing III-Nitrides by Plasma-Assisted Molecular Beam Epitaxy

open access: yes, 2016
Nitride films are promising for advanced optoelectronic and electronic device applications. However, some challenges continue to impede development of high aluminum-containing devices.
Liang, Yu-Han, Nuhfer, T., Towe, Elias
core  

Real-time extraction of growth rates from rotating substrates during molecular-beam epitaxy [PDF]

open access: yes, 1995
We present a method for measuring molecular‐beam epitaxy growth rates in near real‐time on rotating substrates. This is done by digitizing a video image of the reflection high‐energy electron diffraction screen, automatically tracking and measuring the ...
Collins, D. A.   +2 more
core  

Symmetry‐Driven Unconventional Magnetoelectric Coupling in Perovskite Altermagnets: From Bulk to the Two‐Dimensional Limit

open access: yesAdvanced Science, EarlyView.
The symmetry‐driven coexistence of altermagnetism and (anti)ferroelectricity in perovskites shows a strong dimensional dependence. Upon reducing the system from bulk to the two‐dimensional limit, only C‐type antiferromagnetic order retains ferroelectrically switchable altermagnetism, whereas A‐ and G‐type orders become conventional antiferromagnets ...
Zhou Cui   +6 more
wiley   +1 more source

Comparative analysis of the process of formation of fractal metal films: atomistic simulation

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов
In this paper, molecular dynamics method and the tight-binding potential were used to simulate a molecular beam epitaxy process for the formation of fractal metal films of copper subgroup elements (Ag, Au, Cu) on a solid surface of a more refractory ...
V.A. Anofriev   +4 more
doaj   +1 more source

Synaptic κ‐Ga2O3 Photodetectors for Privacy‐Enhancing Neuromorphic Computing

open access: yesAdvanced Science, EarlyView.
We report on a single‐element neuromorphic sensor based on the persistent photoconductivity (PPC) of κ‐phase Ga2O3 capable of sensing ultraviolet light and harnessing intrinsic data privacy. The approach establishes a materials‐enabled pathway toward compact, intelligent, and privacy‐enhancing optoelectronic hardware for next‐generation edge systems ...
Yanqing Jia   +13 more
wiley   +1 more source

Suppression of axial growth by boron incorporation in GaAs nanowires grown by self-catalyzed molecular beam epitaxy

open access: yes, 2018
The addition of boron to GaAs nanowires grown by self-catalyzed molecular beam epitaxy was found to have a strong effect on the nanowire morphology, with axial growth greatly reduced as the nominal boron concentration was increased. Transmission electron
Andrews, Aaron M.   +7 more
core   +1 more source

Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum [PDF]

open access: yes, 2016
In many transition metal oxides (TMOs), oxygen stoichiometry is one of the most critical parameters that plays a key role in determining the structural, physical, optical, and electrochemical properties of the material. However, controlling the growth to
Choi, Woo Seok   +3 more
core   +3 more sources

Solution‐Processed Nickel Oxide as Efficient Hole Transport Layers in Inverted Perovskite Solar Cells

open access: yesAdvanced Science, EarlyView.
This review summarizes recent advances in four mainstream solution‐based techniques for synthesizing NiOx hole‐transport layers for high‐performance perovskite photovoltaic cells, and highlights the key challenges and future prospects for achieving high efficiency, long‐term stability, and low‐cost perovskite photovoltaic technologies toward ...
Zheng Wu   +7 more
wiley   +1 more source

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