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。
Alessandra Ambruosia, Hiromitsu Yamamotob & Jörg Kreuteraa Johann Wolfgang Goethe-Universität, Institut für Pharmazeutische Technologie, Marie-Curie-Straße 9, D-60439, Frankfurt am Main, Germanyb Gifu Pharmaceutical-University, Laboratory of Pharmaceutical Engineering, 5-6-1 Mitahora-higashi, 502-8585, Gifu, JapanInst…
We report on the magnetic properties of CuO nanoparticles prepared by the sol-gel method. M (T) curves show a blocking temperature at T/sub B/=135 K and 160 K for 13 nm and 17 nm size particles, respectively, in measuring field H=100 Oe. The M-H data for both the samples show a reversal magnetization at 300 K, whereas…
Over the past half-decade, the fundamental physical properties of left-handed(LH) metamaterials (MMs) have been established both theoretically and experimentally,and several novel MM-based microwave applications with unique characteristics have already been proposed. This paper provides a recall of the main properties…
Ce-doped borosilicate (BSG), phosphosilicate (PSG), and borophosphosilicate (BPSG) glasses (B:P:Si molar ratios 8:0:92, 0:8:92, and 8:8:84; Ce:Si molar ratio 1 x 10(-)(4) to 1 x 10(-)(2)) were prepared by the sol-gel method. High-resolution transmission electron microscopy (HRTEM), (31)P, (29)Si, and (11)B magic angle…
Surface effects significantly influence the functionality of semiconductor nanocrystals. A theoretical understanding of these effects requires an atomic-scale description of the surface. We present an atomistic tight-binding theory of the electronic and optical properties of passivated and unpassivated CdS nanocrystal…
Bent-core or banana-shaped liquid crystal mesogens are known to form chiral smectic phases from achiral or racemic molecules, representing the first example of conglomerate formation in bulk fluids. The most well studied examples of this behavior occur in the SmCP phases, subphases possessing the B2 chiral layer struc…
With the aim of understanding the underlying physical phenomenon associated with utlralyophobic (or super repellent) surfaces, model studies have been performed on single asperities of different size and shape. A small liquid drop was deposited on top of each model asperity, and liquid was sequentially added. If the a…
In case of a detected partial discharge (PD) in new power transformer during the delivery test in the high voltage laboratory, the most important question arises from both the customer as well as from the manufacturer: where is the PD source? In such a situation, additionally to the measurement of apparent charge with…
Silicon (Si) availability is known to be one of the main factors controlling the productivity and distribution of diatoms (Dugdale et al. 1995), but current chemical and microscopic methods do not allow discrimination of the key species responsible for Si biomineralization in mixed natural diatom assemblages. In 2001,…
Titanium alloy degradation modes are reviewed in relation to their performance in repository environments. General corrosion, localized corrosion, stress corrosion cracking, hydrogen-induced cracking, microbiologically influenced corrosion, and radiation-assisted corrosion of Ti alloys are considered. With respect to…
The measured performance of a column-type microthermoelectric cooler, fabricated using vapor-deposited thermoelectric films and patterned using photolithography processes, is reported. The columns, made of p-type Sb/sub 2/Te/sub 3/ and n-type Bi/sub 2/Te/sub 3/ with an average thickness of 4.5 /spl mu/m, are connected…
It is shown that intrinsic defects responsible for the semi-insulating properties of SiC represent Si-C divacancies in a neutral state ( V Si - V C ) 0 , which have the triplet ground state. The energy level scheme and the mechanism of creating the photoinduced population inversion of the triplet sublevels of the diva…
The rate of dissolution of solid MgO–C into liquid CaO–Al 2 O 3 –SiO 2 –MgO slag at different temperatures was studied under conditions of forced convection by rotating cylindrical refractory specimens in a stationary crucible containing molten slag. The corrosion rate was calculated from the change in diameter of the…
PURPOSE: To prospectively and intraindividually compare equivalent (0.1 mmol per kilogram of body weight) doses of gadobenate dimeglumine and gadopentetate dimeglumine for accuracy of detection and characterization of breast lesions at contrast material-enhanced magnetic resonance (MR) mammography. MATERIALS AND METHO…
Conventional lead–rubber bearings (LRB) may have a problem of instability and unrecovered deformation with a strong ground motion. To improve the problems, this study proposed a new concept of an isolation device in which shape memory alloy wires were incorporated in an elastomeric bearing. This study illustrated the…
Langmuir film properties, UV-vis spectroscopy, epifluorescence microscopy, and transmission electron microscopy were used to study CdSe quantum dots (QDs) in 2D. By combining these results, it was possible to determine the molar absorptivity, limiting nanoparticle area, luminescence property, and arrangement of the QD…
Some of the advances in space charge measurement techniques over the last 5 years are described. It is concluded that significant further improvements in spatial resolution are unlikely in the next 5 years, except in the case of the LIMM technique implemented using very short laser pulses, where spatial resolution app…
The structure and dynamics of linear monodisperse polyethylene (PE) melts (C 160 H 322 and C 440 H 882 ) containing homogeneously distributed spherical nanoparticles were investigated. The PE chains were simulated using a coarse-grained model and a Monte Carlo algorithm. Two variables were considered: (i) the wall-to-…
The chemistry of surface degradation by ultraviolet light (UV) of high temperature vulcanized dimethyl silicone rubber (HTV SIR) and ethylene propylene diene ter-polymer (EPDM), has been studied by many researchers. Insulators fabricated from these materials are normally "qualified" for outdoor use by accelerated life…
By optimization of the synthesis of ferromagnetic-filled carbon nanotube ensembles on Si substrates (catalytic decomposition of ferrocene) and following annealing at 645°C, marked hysteresis loops can be measured by the alternating-gradient method. Unusually high coercivities and strong anisotropies with an easy magne…