29 Result(s)
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Article
Deep Levels in Superlattices
The physics of deep levels in semiconductors is reviewed, with emphasis on the fact that all substitutional impurities produce deep levels - some of which may not lie within the fundamental band gap. The chara...
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Deep levels in superlattices
The physics governing deep levels in superlattices and quantum wells is elucidated, with emphasis on the importance of shallow-deep transitions caused by a band edge passing through a deep level, and the accom...
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Article
A Study on the Blends of Epoxy/Polybutadiene and the Application to the Encapsulation of a Capacitor
This paper describes the blends of epoxy/polybutadiene and the application of the blends to the encapsulation of capacitors. Experiments showed that the hydroxy-carboxyl terminated polybutadiene (HCTPB) had a ...
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Article
GaN/AℓxGa1-xN Wurtzite Semiconductor Superlattices
A theory of electronic structures of NGaNxNAℓGaN GaN/AℓxGa1-xN wurtzite semiconductor superlattices (grown in the direction of the c-axis) is developed and used to predict the superlattices’ band structures, ener...
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Article
Deep Levels in Type-II Superlattices
Quantum confinement in superlattices affects shallow levels and band edges considerably (length scale of order 100 Å), but not deep levels (length scale of order 5 Å). Thus by band-gap engineering, one can mov...
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Article
Electronic Structure of Si Doped by Rare-Earth Yb3+
The electronic structure of Yb3+-doped Si is elucidated in terms of level repulsion between the Si vacancy's deep levels (and spectral density) and the Yb3+ levels, both for bulk Si and for small clusters. The 2F
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Article
Role of interfacial-charge in the growth of GaN on α-SiC
The growth of GaN and A1N films on (0001) substrates of 6H-SiC has produced high-quality opto-electronic films. The SiC surface at the interface with GaN or A1N is either Si-terminated or C-terminated, and the...
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Article
Sublimation Growth and Defect Characterization of AlN Single Crystals
In this paper, we report results from AlN single crystal growth experiments using a sublimation physical vapor transport growth technique. AlN single crystal boules up to 7mm in diameter were demonstrated. Cha...
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Structural and elastic properties of Cu6Sn5 and Cu3Sn from first-principles calculations
We investigated the elastic properties of two tin-copper crystalline phases, the η′-Cu6Sn5 and ε-Cu3Sn, which are often encountered in microelectronic packaging applications. The full elastic stiffness of both ph...
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Article
Open AccessPreferential Growth of Semiconducting Single-Walled Carbon Nanotubes on Substrate by Europium Oxide
In this paper, we have demonstrated that europium oxide (Eu2O3) is a new type of active catalyst for single-walled carbon nanotubes (SWNTs) growth under suitable conditions. Both random SWNT networks and horizont...
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Article
An Energy-Efficient Electrochemical Method for CuO–TiO2 Nanotube Array Preparation with Visible-Light Responses
A rapid and energy-efficient method was presented for preparing CuO–TiO2 nanotube arrays. TiO2 nanotube arrays were first prepared by anodic oxidation using titanium anode and platinum cathode. Then, the formed T...
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Article
The anti-tumor effect of p53 gene-loaded hydroxyapatite nanoparticles in vitro and in vivo
This research focused on anti-tumor effect of pEGFP-C1-p53 (p53) gene-loaded hydroxyapatite (HAp) nanoparticles in vitro and in vivo. Four kinds of HAp nanoparticles, spherical HAp nanoparticles (S-HAp, diamet...
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The properties of silica nanoparticles with high monodispersity synthesized in the microreactor system
A new combined micromixer/microreactor/batch reactor system for the synthesis of monodisperse silica particles was demonstrated, which showed superiorities over the batch reactor. The silica nanoparticles with...
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Effect of drying technique on the morphological and textural characteristics of mesoporous silica synthesized in the microreactor
The mesoporous silica with high monodisperse inter-particle voids was obtained through different drying methods (oven, freeze, and spray) of wet-gel silica. And the wet-gel silica was prepared in the microreac...
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A bio-inspired Co3O4-polypyrrole-graphene complex as an efficient oxygen reduction catalyst in one-step ball milling
The development of non-precious metal-based electrocatalysts has attracted much research attention because of their high oxygen reduction reaction (ORR) activities, low cost, and good durability. By one-step in-s...
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Article
Natural tea-leaf-derived, ternary-doped 3D porous carbon as a high-performance electrocatalyst for the oxygen reduction reaction
To commercialize fuel cells and metal-air batteries, cost-effective, highly active catalysts for the oxygen reduction reaction (ORR) must be developed. Herein, we describe the development of low-cost, heteroat...
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Article
Effect of Strain Rate on the Plastic Deformation and Fracture of 90W-7Ni-3Fe Alloy Prepared by Liquid-Phase Sintering
In this study, the effect of the strain rates on the plastic deformation behavior and fracture mechanism of 90W-7Ni-3Fe heavy alloy prepared by liquid-phase sintering was investigated. Stress–strain tests were...
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Article
Synthesis of orthogonally assembled 3D cross-stacked metal oxide semiconducting nanowires
Assemblies of metal oxide nanowires in 3D stacks can enable the realization of nanodevices with tailored conductivity, porous structure and a high surface area. Current fabrication methods require complicated ...
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Article
The combined method to synthesis silica nanoparticle by Stöber process
To get the controlled size and monodispersed silica nanoparticle is a popular topic since its broad applications are in a lot of fields such as biological medicine, military project, catalyst, and chip industr...
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Article
The rapidly reversible processes of activation and deactivation in amorphous silicon heterojunction solar cell under extensive light soaking
Silicon heterojunction (HJT) solar cells use hydrogenated amorphous silicon (a-Si:H) to form passivating contacts. To obtain high performance, many crucial applications have been confirmed and introduced. In t...
