Materials Literature
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Abstract Numerical simulations and experimental studies of the lasing effect in chiral liquid crystals are presented. It is shown that ring-like light emission, which is often observed experimentally, is a true lasing effect. Lasing condition and different modes in thin liquid crystal layers are discussed.
The photophysical properties of tetrakis(1,1-dimethyl-2-trimethylammonium)ethylphthalocyaninato zinc(II) tetraiodide (I) – a water-soluble cationic phthalocyanine – are presented in the presence of human serum albumin (HSA) and in micelles of sodium dodecylsulfate ( SDS ) and hexadecyltrimethylammonium chloride ( CTAC…
Lipid-packaged, mixed-valence linear platinum complexes are dispersed in chloroform, chlorocyclohexane and in methylcyclohexane. They show indigo-colors, which are identical to solid samples. These lipid-complexes display supramolecular thermochromism, resulting from heat-induced dissociation and recovery of coordinat…
The reaction of diamidopyridine-dipyrromethane or dipyrromethene hybrid macrocycles with palladium(II) affords mono-metalated complexes, wherein the metal centre is coordinated to the macrocycle exclusively through pyrrolic nitrogen donor atoms.
A one-dimensional model based on the Stefan-Maxwell formulation for mass transfer of the main components of a binary molten carbonate electrolyte, including all of the nonidealities, was formulated and applied to the molten carbonate fuel cell (MCFC). The Stefan-Maxwell diffusion coefficients were determined from lite…
The electrochemical reduction of hydrogen peroxide has been studied on a series of simulated nuclear fuel (SIMFUEL) materials with different amounts of simulated fission products. Steady-state polarization measurements under diffusion-compensated conditions show that the reaction proceeds with a weak dependence on app…
Profound understanding and survey of magnesium base intermetallic compounds is hindered by various difficulties in their processing and fabrication. Solid-state synthesis via the bulk mechanical alloying (BMA) is free from contaminations and segregation through high reactivity of elemental constituents against crucibl…
A new semi‐fluorinated chiral smectic liquid crystal, W504, is investigated by electro‐optic, dielectric and X‐ray scattering experiments. It exhibits a huge dielectric soft mode response, strong electroclinic effect and a birefringence which increases considerably with the director tilt angle θ; typical characteristi…
The mesoscopic structures of the Heusler alloys Ni 49.1 Mn 29.4 Ga 21.5 and Ni 2 MnGa are studied by small-angle polarized neutron scattering in the temperature range 15 < T < 400 K. The characteristic temperatures of phase transformations (ferromagnetic, martensitic, and premartensitic transformations) and the charac…
A series of cholesteryl end-capped biodegradable oligo/poly(trimethylene carbonate)s were synthesized and characterized. The end-capped oligomers/polymers were synthesized by the ring-opening polymerization of trimethylene carbonate (TMC) initiated by cholesterol bearing a hydroxyl group without adding any catalyst. T…
Infrared-to-visible upconversion emission was used for photocuring of a pentaerythritol tetraacrylate (PETA) by infrared laser irradiation to achieve local polymerization on an upconversion phosphor. Submillimeter-sized, cone-shaped and solid poly (PETA) was successfully formed on a Y2O3 compact doped with 5 mol% Er u…
We investigated thermal expansion properties of Ni-Fe alloy electrodeposits, which are anticipated for use as low thermal expansion materials.Thick and crack-free Ni-Fe alloy electrodeposits with 25 to 58mass% Fe contents were obtained from sulfate/chloride electrolytes with additives, saccharin and malonic acid. The…
This paper describes the results of experiments and simulations made to examine the corona discharges from water droplets on a polymer surface exposed to electrical stress. In this study, water droplets with different conductivities and volumes were placed on the surface of plate-shaped high temperature vulcanized sil…
Indium-oxide-substituted calcium zirconate of the nominal composition CaZr 0.9 In 0.1 O 3-␦ is an important perovskite-type hightemperature proton conductor.In the present study, the transition from proton conduction to oxide ion conduction in this material has been investigated experimentally.A specially designed gal…
The B2⁄L21 order–disorder transition and ferromagnetic/paramagnetic transition temperatures in Co2(Cr1−xFex)(Ga1−yAly) alloys were determined by differential scanning calorimetry and transmission electron microscopy. It was found that spinodal decomposition cannot be suppressed by quenching in the Al-rich portion of C…
In this work, surface modification of 6FDA-BisAAF fluorine-contained polyimide by or plasma was carried out and material characteristics of the surfaces after plasma treatment were investigated. X-ray photoelectron spectroscopy analysis reveals that plasma will react with carbon atoms in the polyimide structure to for…
Preface Heat of Adsorption of the Two Linear CO Species Adsorbed on Bimetallic Cu-Rh/A12O3 Catalyst Using the AEIR Method Structure and Activity of rhenium in the Re/?-A12O3 Catalysts MgC12: A Magic Compound for the Generation of High Performance Olefin Polymerisation Catalysts Catalytic Activity Enhancement of Ag Pro…
到 TiNi 合金的混合 TiO_2 和 NiO 粉末的直接电气化学的减小被经常的电压电解成功地在 900 deg C 在熔融的 CaCI_2 表明了。电解精力消费象 23.4 kWh/kg-TiNi 一样低，尽管电流效率在初步的实验是 20.5% 。在这个过程期间， NiO 首先以高速度被归结为 Ni，由 TiO_2 伴随到是的 CaTiO_(3_x ) 的 perovskitized 逐渐地正在被减少 toNi_3Ti 和 TiNi，由 preformed Ni 的去极帮助了。为 TiNi 合金的准备的房间电压为 Ti 是比那低的。调整房间电压不仅影响了减小速度，而且把方便存取提供了给 thenickel/perovskite…
Abstract We describe and summarize the optical challenges for future instrumentation for Extremely Large Telescopes (ELTs). Knowing the complex instrumental requirements is crucial for the successful design of 30–60 m aperture telescopes. After all, the success of ELTs will heavily rely on its instrumentation and this…
With increasing requirements on the crash safety of automotive components and on virtual prototyping it becomes more and more important to model damage behaviour of structural components in crash simulations. Especially high strength steels show a lower ductility in comparison with conventional steels. To predict the…