Results 31 to 40 of about 106,933 (307)

Wide Bandgap Nanowires: Synthesis, Properties, and Applications

open access: yes, 2022
This book presents first-hand knowledge on wide bandgap nanowires for sensor and energy applications. Taking a multidisciplinary approach, it brings together the materials science, physics and engineering aspects of wide bandgap nanowires, an area in ...
Nguyen, Nam-Trung   +3 more
core   +1 more source

Suppressing the Back-Gating Effect of Normally-Off p-GaN Monolithic Bidirectional Switch on 6-Inch Sapphire for Compact Power Conversion Systems

open access: yesIEEE Journal of the Electron Devices Society
In this work, normally-off p-GaN monolithic bidirectional switch (MBDS) with common-drain configuration on 6-inch sapphire has been successfully fabricated using CMOS-compatible process in our pilot line.
Junbo Wang   +9 more
doaj   +1 more source

BANDGAP NARROWING IN NANO-WIRES [PDF]

open access: yesInternational Journal of Modern Physics C, 2006
In this paper we consider two different geometry of quasi one-dimensional semiconductors and calculate their exchange-correlation induced bandgap renormalization (BGR) as a function of the electron-hole plasma density and quantum wire width. Based on different fabrication scheme, we define suitable external confinement potential and then leading-order
Nozari, Kourosh, Madadi, Mahyar
openaire   +2 more sources

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

open access: yesAdvanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao   +2 more
wiley   +1 more source

Optimization of Low-Voltage p-GaN Gate HEMTs for High-Efficiency Secondary Power Conversion

open access: yesMicromachines
The explosive demand for high-performance secondary power sources in artificial intelligence (AI) has brought significant opportunities for low-voltage GaN devices.
Lili Zhai   +13 more
doaj   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

Van der Waals β-Ga2O3 thin films on polycrystalline diamond substrates

open access: yesNature Communications
The self-heating effect in wide bandgap semiconductor devices makes epitaxial Ga2O3 on diamond substrates crucial for thermal management. However, the lack of wafer-scale single-crystal diamond and severe lattice mismatch limit its industrial application.
Jing Ning   +9 more
doaj   +1 more source

First-principles calculations of electronic and optical properties of aluminum-doped β-Ga2O3 with intrinsic defects

open access: yesResults in Physics, 2017
In this manuscript, the effects of intrinsic defects on the electronic and optical properties of aluminum-doped β-Ga2O3 are investigated with first-principles calculations.
Xiaofan Ma   +3 more
doaj   +1 more source

Topological Impact of Delocalization on the Stability and Bandgap of Partially Oxidized Graphene [PDF]

open access: yes, 2022
Strategic perturbations on graphene framework to inflict a tunable energy bandgap promises intelligent electronics that are smaller, faster, flexible, and much more efficient than silicon.
Pattath D., Pancharatna   +2 more
core   +2 more sources

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

open access: yesAdvanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami   +4 more
wiley   +1 more source

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