Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A nano-composite material of magnesium oxide (MgO) added to a low-density polyethylene (LDPE) was subjected to electrical tree breakdown investigation. The LDPE without nano-fillers was lower in breakdown voltage than the LDPE added with nano-fillers. The breakdown voltage was increased by increase of nano-filler conc…
A novel diamine, 3,3‘-bis( N -aminophthalimide) (BAPI), was prepared from 3,3‘-bis( N -phenylphthalimide). Its structure was determined via IR, 1 H NMR, 15 N NMR, elemental analysis, and single-crystal X-ray diffraction analysis. A series of homo- and copolyimides were synthesized by a conventional one-step method in…
Abstract Melt‐crystallized films of poly( L ‐lactic acid) (PLLA) with M v in the range of 3.8 ∼ 46 × 10 4 consisting of α‐form crystals were uniaxially drawn by solid‐state coextrusion. The effects of M v , extrusion draw ratio (EDR), and extrusion temperature ( T ext ) on the crystal/crystal transformation from α‐ to…
We report the enhancement of electric and fatigue-endurance properties of vanadium-doped SrBi4Ti4O15 (SBTi) thin films deposited by a refined sol-gel method. The structures and surface morphologies of the films were characterized by x-ray diffraction, atomic force microscopy, and scanning electron microscopy. Their el…
Recent developments in the field of supercapacitors have led to the achievement of high specific energy and high specific power devices which are suitable for energy storage in high power electronic applications, especially in the field of management of embarked electrical power. Equivalent serial resistance is put fo…
The shortage of human donor valves and disadvantages of current mechanical and xenogenic valve grafts cause a growing demand for biologically engineered valves. We developed a bioreactor for in vitro transformation of porcine semilunar heart valves into human valves. The reactor design was optimized in order to achiev…
Nanoparticles of trans-beta-carotene are accessible using spinning disk processing (SDP), by varying the reaction conditions and the choice of surfactant, macrocyclic amphiphiles, sulfonato-calix[4,5,6,8]arenes, and alpha,beta-cyclodextrins. SDP ensures rapid mixing and fast kinetics, and nanoparticles of the carotene…
We present a theory that enables us to construct heteroclinic connections in closed form for $2\bf{u}_{xx}=W_{\bf u}({\bf u})$ , where $x\in\mathbb{R},\;{\bf u}(x)\in \mathbb{R}^2$ and $W$ is a smooth potential with multiple global minima. In particular, multiple connections between global minima are constructed for a…
Silicon nanocrystals, average sizes ranging between 3 and 7nm, were formed in sapphire matrix by ion implantation and subsequent annealing. Evolution of the nanocrystals was detected by Raman spectroscopy and x-ray diffraction (XRD). Raman spectra display that clusters in the matrix start to form nanocrystalline struc…
Polycrystalline Si1−xMnx thin films codoped with boron have been fabricated by sputtering technique followed by postcrystallization processes. Structural, magnetic, and transport properties of the films were investigated. Magnetic property investigation indicated that the films consist of two ferromagnetic phases. The…
Solubility, polymorphism, crystallinity, and crystal habit of acetaminophen and racemic (±)-ibuprofen were determined by initial screening of 23 solvents for scale-up. Solubility curves were constructed, and solubility at 25 °C was plotted against the dielectric constants of various solvent as a fingerprint for solute…
Some of the major dielectric phenomena observed in polymer nanocomposites are explained in terms of a multi-core model proposed by the author. They include characteristics associated with low field conductivity, high field conduction, permittivity, loss tan delta, the threshold field for space charge formation and EL…
Abstract Soils developed on Quaternary fluvial fill terraces in the humid tropics of Costa Rica display progressive changes in mineral assemblage, chemical composition and particle size with age. Clay minerals from B horizons of active floodplains are predominantly smectite with lesser amounts of disordered kaolinite.…
Abstract A novel chemical process for producing hydrophobic nano-copper particles with satisfied antioxidation property is described here. Well-dispersed nano-copper particles with satisfied surface properties were obtained from the water/organic solution. In this process, oleic acid acts as both a phase-transfer agen…
The foaming characteristics of low-molecular-weight emulsifiers (LMWEs) and proteins are important attributes during the production, storage, transport, and consumer perception of quality (appearance) of food dispersions (emulsions and foams). In this article, we consider the analysis of interfacial (adsorption isothe…
An experimental electron density (ED) analysis of the spin crossover coordination complex Fe(btr)(2)(NCS)(2).H(2)O has been performed in the ground low-spin (LS) state and in the metastable thermally quenched high-spin (HS) state at 15 K by fitting a multipolar model to high-resolution X-ray diffraction measurements.…
Improvements in the dielectric properties of composite dielectrics have been previously documented when the filler material used is reduced to nanometric dimensions. While the reasons for this have been traced to the physics and chemistry taking place at the interface, and dramatic changes in the magnitude and dynamic…
Abstract Multiwall carbon nanotubes were observed in a small fraction of soot collected by thermophoretic precipitation from Texas piñon pine wood burning in air. Transmission electron microscopy showed the carbon nanotubes to be aggregated with other fullerene‐like nanoforms and graphite fragments. Copyright © 2006 R…
Abstract Au2S nanoparticles (NPs) were prepared in the cavity of the cage-shaped protein, apoferritin. Apoferritin has a cavity, 7 nm in diameter, and the diameter of fabricated Au2S NPs is about the same size with the cavity and size dispersion was small. Although Au2S is generally insoluble in water, our prepared Au…
The present study investigated stress relaxation in fabrics with increased elasticity. For prediction of the degree of stress relaxation the frequently used mechanical models reported in the literature were analyzed. The mechanical models which were used in this paper were: Maxwell's model, the two-component Maxwell's…