24 Result(s)
within
English
Nanotechnology
**yuan Ren
Article
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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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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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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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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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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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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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Regioselective acylation of pyridoxine catalyzed by immobilized lipase in ionic liquid
The regioselective acylation of pyridoxine catalyzed by immobilized lipase (Candida Antarctica) in 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) has been investigated, and compared with that in acet...
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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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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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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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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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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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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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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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One-dimensional nanochains consisting of magnetic core and mesoporous aluminosilicate for use as efficient nanocatalysts
Magnetic assembly at the nanoscale level brings potential possibilities in obtaining novel delicate nanostructures with unique physical, photonic or electronic properties. Interface surfactant micelle-directed...
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Smoke suppressant in flame retarded thermoplastic polyurethane composites: Synergistic effect and mechanism study
Considerable smoke and toxic volatiles generation has compromised the application of thermoplastic polyurethane (TPU) and caused a great threat to human life. Here, nano-MgFe layered double hydroxide (MgFe-LDH...
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Superoxide-like Cu/GO single-atom catalysts nanozyme with high specificity and activity for removing superoxide free radicals
Although nanozyme has become an emerging area of research attracting extensive attention recently, the activity and specificity of currently reported nanozymes are generally lower than those of natural enzymes...
