Materials Literature
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Abstract A simple and effective approach to the aqueous‐phase synthesis of crystalline silver nanorods and nanowires is demonstrated, using which their diameters and aspect ratios can be effectively controlled. The synthesis involves a template‐less and non‐seed process to high‐quality nanoparticles, which is low‐cost…
We performed a comprehensive scaling study of Schottky-barrier (SB) carbon nanotube transistors using self-consistent, atomistic scale simulations. We restrict our attention to SB carbon nanotube field-effect transistors (FETs) whose metal source-drain is attached to an intrinsic carbon nanotube channel. Ambipolar con…
Abstract The introduction of a fifth amphibole group, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < B (M g ,Fe 2+ ,Mn 2+ ,Li) < 1.50 and 0.50 ≤ B (Ca,Na) ≤ 1.50 a.f.p.u. (atoms per formula unit), with members whittakerite and ottoliniite, has been required by recent discoveries of B (LiNa) amphiboles. This, and…
The composite right/left-handed (CRLH) transmission line (TL) is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. The dispersion diagram of the two-dimensional (2-D) CRLH-TL is obtained analytically based on the Bloch-Floquet theory, and the unique phenomenon of infinite guided…
It has been widely shown that many plant-derived compounds present significant anti-inflammatory effects. For this reason, they represent potential molecules for the development of new drugs, especially designed for the treatment and/or control of chronic inflammatory states such as rheumatism, asthma, inflammatory bo…
We report a novel subwavelength grating that has a very broad reflection spectrum and very high reflectivity. The design is scalable for different wavelengths. It facilitates monolithic integration of optoelectronic devices at a wide range of wavelengths from visible to far infrared.
Since most archaea are extremophilic and difficult to cultivate, our current knowledge of their biology is confined largely to comparative genomics and biochemistry. Haloferax volcanii offers great promise as a model organism for archaeal genetics, but until now there has been a lack of a wide variety of selectable ma…
Carbon nanotubes are molecular-scale tubes of graphitic carbon with outstanding properties. They are among the stiffest and strongest fibres known, with Young's moduli as high as 1 TPa and tensile strengths of up to 63 GPa. They also have remarkable electronic properties and can be metallic or semiconducting depending…
Creep resistance is a major requirement for the use of magnesium in automotive powertrain components that are currently made of aluminium or cast iron. This paper summarises various new magnesium alloys that have been developed in recent years for elevated temperature applications. The alloy development basis, mechani…
Metal nanoshells are a novel type of composite spherical nanoparticle consisting of a dielectric core covered by a thin metallic shell which is typically gold. Nanoshells possess highly favorable optical and chemical properties for biomedical imaging and therapeutic applications. By varying the relative the dimensions…
Les biocomposites mineraux sont soit naturels, comme les structures squelettiques, soit artificiels, comme divers implants et de nouveaux biomateriaux. Dans les deux cas, leurs parties organiques sont des cristaux liquides ou des analogues stabilises, etroitement apparentes a ces etats intermediaires de la matiere, et…
Single crystals of the high-temperature modification of zinc catena-polyphosphate, beta-Zn(PO(3))(2), were grown from a melt and quenched from 1093 K to room temperature. The structure was solved from single-crystal X-ray diffraction data and is built of corrugated (PO(3))( infinity ) polyphosphate chains, which exten…
The solubilities of the disodium salt hemiheptahydrate of ceftriaxone in different concentrations of methanol in water at (25, 35, and 45) °C are measured by using a gravimetrical method. The densities of the saturated solution are also determined with a digital densimeter (Anton Paar, model DMA 45) at corresponding t…
Dans le present article de revue, nous discutons les mecanismes de debut d'interaction entre un medicament et SiO 2 sous contraintes mecaniques, sur la base de changements dans les especes radicalaires, de formation de liaisons pontantes et de mise en ordre a courte distance. L'indomethacine (IM) a ete utilisee comme…
Experimental, methodical and theoretical studies dealing with phase equilibria and phase structures of polymer blends are generalised. The general and specific features of the change in solubility of polymers with changes in the molecular mass and copolymer composition and upon the formation of three-dimensional cross…
Ag 4 I 4 nanoclusters have been synthesized in half of the sodalite cavities of fully K + -exchanged zeolite A. An additional KI molecule is retained in each large cavity as part of a near square planar K 4 I 3+ cation. A single crystal of Ag 12 -A, prepared by the dynamic ion-exchange of Na 12 -A (LTA) with aqueous 0…
The characteristic features of the structures and properties of crown-substituted porphyrinates and phthalocyaninates are considered. Interactions of these compounds with alkali metal salts yield supramolecular ensembles. The factors determining the architecture of such ensembles are described. The bibliography includ…
Lithium intercalation into the oxide slabs of the cation-deficient n = 2 Ruddlesden-Popper oxysulfide Y(2)Ti(2)O(5)S(2) to produce Li(x)Y(2)Ti(2)O(5)S(2) (0 < x < 2) is described. Neutron powder diffraction measurements reveal that at low levels of lithium intercalation into Y(2)Ti(2)O(5)S(2), the tetragonal symmetry…
In this study, poly-beta-hydroxybutyrate (PHB) production by the Bacillus subtilis 25 and Bacillus megaterium 12 strains was investigated in nutrient broth medium at different incubation times (between 6 h and 48h). The best PHB production and all yields of these strains were determined. The produc…
An electron probe X-ray microanalysis (EPMA) technique, using an energy-dispersive X-ray detector with an ultrathin window, designated a low-Z particle EPMA, has been developed. The low-Z particle EPMA allows the quantitative determination of concentrations of low-Z elements, such as C, N, and O, as well as chemical e…