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。
Alanates and boranates are intensively studied because of their potential use as hydrogen storage materials. In this paper, we present a first-principles study of the electronic structure and the energetics of beryllium boranate $[\text{Be}{({\text{BH}}_{4})}_{2}]$. From total energy calculations, we show that---in co…
Abstract The effect of the same amount of precipitated silica nanofiller on the curing and mechanical properties of natural rubber and synthetic polyisoprene was investigated. The silica surfaces were pretreated with bis(3‐triethoxysilylpropyl) tetrasulfide (TESPT) to chemically bond silica to rubber. The rubbers were…
The synthesis of nanosized polymer latex particles using high-frequency ultrasound (213 kHz) has been successfully performed. The effects of surfactant type and concentration of surfactants on the rates of polymerization, latex size, and molecular weights of the polymers produced are presented.
Intensive research efforts have been placed on the development of nanospheres for targeted drug delivery for treating a variety of diseases, including coronary restenosis, cancer, and inflammatory reactions. Although most of these drug-bearing spheres are delivered via intravenous administration, little is known about…
Homoepitaxial ZnO layers were grown on O-polar and Zn-polar surfaces of ZnO single crystal substrates by chemical vapor deposition. While the structural properties (surface roughness and rocking curve half width) were identical within experimental error, the optical properties as monitored by photoluminescence (PL) we…
Abstract Copolymers ( p ‐CMF) synthesized by the condensation of p ‐cresol and melamine with formaldehyde in the presence of an acid catalyst and using varied molar proportion of the reacting monomers. Copolymer resin compositions were determined on the basis of their elemental analysis. The number average molecular w…
The synthesis of chiral periodic mesoporous organosilicas (ChiMO) of MCM-41 type using a bis-silylated tartramide derived from l -(+)-dimethyl tartrate (Sharpless and Kagan ligand) has been studied. The ChiMO materials were characterized by powder XRD, TEM, and nitrogen adsorption–desorption measurements, verifying th…
The assembled polyelectrolyte nanotubes composed of poly(styrenesulfonate) and poly(allylamine hydrochloride) multilayers by using the layer-by-layer assembly combined with the porous template method can be transformed into capsules by a high-temperature treatment. Scanning electron microscopy and confocal laser scann…
In thin films of rare‐earth manganites, RE 1− x M x MnO 3 (RE=rare earth, M=Ca, Sr, Ba), with mixed‐valence perovskite structure, the transport properties highly depend on the deposition technique, processing conditions, and the substrate used. Chemical solution deposition techniques provide many advantages, such as l…
The adsorption and catalytic degradation of nitrosamines by zeolite A with cesium, potassium, sodium, or calcium cation was systemically studied in the research reported in this article. The results of instantaneous adsorption, temperature-programmed surface reaction, and in situ Fourier transform infrared spectroscop…
The emerging interest toward applications of robust highly aligned carbon nanotube forests requires synthesis of such films in a controlled manner. In this paper, the growth mechanism and influence of growth parameters on the structural properties of multiwalled carbon nanotube films grown by catalytic chemical vapor…
Abstract In this study, layered clay/polymer nanocomposites were developed based on epoxy resins and montmorillonite as the nanoplatelet reinforcement. Clay particles were treated with hexadecyltrimethylammonium chloride (HTCA) through an ion exchange reaction. In this way, Na + interlayer cations of the clay is excha…
Projected trends for capacitors include increasing capacitance density and decreasing operating voltages, dielectric thickness and process cost. Advances in the fabrication and processing of barium strontium titanate (BST) and lead zirconate titanate (PZT)‐based thin films are presented toward attaining these goals in…
The surface plasmon resonance (SPR) band of Au nanoparticles embedded in an YSZ matrix was monitored at 500 °C under varying gas exposure concentrations of H 2 and O 2 in N 2 . Because the peak position of the SPR band relies closely on the number of driven oscillating free electrons per gold nanoparticle, we were abl…
Large-scale synthesis of semiconductor nanocrystals or quantum dots (QDs) with high concentration and high yield through simultaneously increasing the precursor concentration was introduced. This synthetic route conducted in diesel has produced gram-scale CdSe semiconductor quantum dots (In optimal scale-up synthetic…
The encapsulation of living cells in materials with good optical and mechanical properties often produces death or stress due to the release of toxic byproducts originated during the synthesis. We present here a method to assess the cellular stress that silica entrapment exerts over living cells taking into account th…
There is experimental evidence that nitrogen forms a polymeric solid under pressure. In this study, we compare various solid nitrogen phases by means of ab initio calculations based on density-functional theory to describe solid nitrogen at different pressures. We show that two phases with covalent bonds in all three…
Abstract A series of mixed oxides supported on TiO 2 (Mn 1−y Cu y O x /TiO 2 ) synthesized by incipient wetness impregnation method have been characterized and tested for toluene oxidation volatile organic compounds (model). For all catalysts, the total conversion (100%) of toluene into CO 2 was obtained at temperatur…
Multigram quantities of manganese oxide (K-OMS-2) nanomaterials in the size range of 4−20 nm and with very high surface areas up to 227 m 2 /g were produced rapidly via microwave-reflux route with use of mixed aqueous and nonaqueous solvents. The formation process, particle size, crystallite size, crystal structure, a…
BACKGROUND: Different types of carbon nanotubes may represent toxic hazards due to their size distribution and massive surface area. They may adsorb other toxic agents that can consequently be transported into the body. The aim of the present study was to determine the possible genotoxicity of carbon nanotubes. MATERI…