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。
CpMo(CO)(3)Cl reacts with the hydroxyl (Si-OH or Si-OH-Al) functionalities of mesoporous molecular sieves such as MCM-41, MCM-48 and its aluminium analogues during grafting. XRD, N(2) adsorption-desorption, BET surface area analysis and TEM show the resulting samples as being well ordered and maintaining a uniform por…
Equal-Channel-Angular extrusion (ECAE) has been conducted at room temperature in order to develop an ultrafine-grained structure in a Zn-22 mass% Al eutectoid alloy. The microstructures had an equiaxed and homogeneously distributed Al-rich and Zn-rich duplex-phase and its average grain size was about 0.35 μm. This all…
Iron-chromium ferritic alloy is a candidate for the interconnect of solid oxide fuel cells (SOFCs). Gastightness is one of the most important properties of the interconnect in a planar-type SOFC. Hydrogen permeation in an iron-chromium alloy was measured in an atmosphere simulating an SOFC at 1073 K. Hydrogen permeabi…
The polymerisation of a fused 2,5-dibromothieno–TTF derivative has been achieved using Ni(COD)2 as the catalyst. Whilst higher molecular weight fractions are sparingly soluble, lower weight samples are soluble in common organic solvents. Cyclic voltammetry shows that the polymer undergoes two reversible oxidation proc…
Magnetocaloric effects due to the itinerant-electron metamagnetic transition for La(Fe0.90Si0.10)13 compounds promising as refrigerants are enhanced by a partial substitution of Ce for La. The values of the isothermal magnetic entropy change ΔSm and the adiabatic temperature change ΔTad for La1−zCez(Fe0.90Si0.10)13 co…
How electrochemical capacitance is affected by the non-stoichiometric properties of nickel oxide films is reported. Nonstoichiometric thin-film electrodes were prepared for use in a supercapacitor by reactive radio-frequency (rf) sputtering of a nickel metal target. The oxygen partial pressure in the sputtering gas wa…
This paper presents the results of quasi-static and dynamic tensile tests on 2, 3 and 4 mm thick 316L austenitic stainless steel. It details the test conditions and discusses the results, particularly focusing on strain rate sensitivity and methods of employing the tensile properties in the finite element package, ABA…
A new approach was developed to prepare coaxial (core-shell) CdS-ZnS nanowires via a one-step metallo-organic chemical vapor deposition (MOCVD) process with co-fed single source precursors of CdS and ZnS. Single source precursors of CdS and ZnS with sufficiently different reactivity were prepared and paired up to form…
A complex of cobalt(II)(OCN)(2) coordinated with four pyridines having a stable tert-butyl aminoxyl exhibited in frozen MTHF a slow magnetic relaxation for the reorientation of magnetization with activation barrier, Delta/k(B) = 50 K, and a hysteresis loop having a fast relaxation at 0 Oe below 2.5 K.
Electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance of the chromate conversion coating (CCC) formed on two different substrates, namely bare and clad 2024 aluminum alloys, and after different surface preparation procedures, namely acid pickling with or without desmutting. The…
Gallium(III) corroles are closed-shell analogs of zinc(II) porphyrins. These intensely fluorescent molecules can be modified readily to tune their solubility and photophysical properties. A water-soluble gallium corrole has been synthesized and investigated in depth; it binds tightly to human serum albumin, opening th…
The mesogenic and optical properties of few families of nematic liquid crystals with low, medium and high birefringence as well as high tilted chiral anticlinic(antiferroelectric)smectics recently developed have been shortly characterized and reviewed. They are:alkyl 4-trans-(4-trans-alkylcyclohexyl)cyclohexyl carbona…
Hydrogen can be effectively and selectively produced from the partial oxidation of methanol over Ag/CeO(2)-ZnO catalyst at low temperatures (T(r) < 200 degree C).
We report on a method for high speed, large stroke phase modulation using dual frequency control of liquid crystals. Our system uses an all-electronic feedback system in order to simplify the control. We show half wave phase modulations of ~120Hz with the operating point varying over nearly the full dynamic range of t…
The structural, morphological and chemical–physical characterization of films constituted of self-assembled non-helical region free type I collagen molecules has been investigated. The results indicate the presence of information at the molecular level which allow collagen I molecules to self-assemble. In the fiber fo…
A gelatin/hyaluronic acid (GH) sponge has been fabricated by freeze-drying and cross-linking. The GH sponge was insoluble when cross-linked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide. The morphologies of sponges were investigated using a field emission scanning electron microscope. The porosity of the GH spon…
We present the facile preparation and characterization of the first “unwrapped” hexa-peri-hexabenzocoronene derivative, which forms a stable columnar liquid crystalline mesophase with a practically accessible isotropization temperature.
Using Ti-50Ta, Ti-50Ta-Sn and Ti-50Ta-Zr alloys, the effects of Sn and Zr additions on phase constitution in the solution treated and quenched state and aging behavior were studied by electrical resistivity and Vickers hardness measurements and X-ray diffactometry. All alloys were solution treated at 1173 K for 3.6 ks…
Two columnar phases forming 2,4,6-triarylamino-1,3,5-triazines have been investigated in binary mixtures with calamitic and non-liquid crystalline benzoic acids carrying one or two alkoxy chains at the aromatic core. The triazines form hydrogen bonded aggregates with the complementary acids. Each investigated equimola…
For the first time the photooptic effect in induced cholesteric mixtures using photosensitive nematic host has been observed. The changes of the pitch (color) and optical anisotropy (Δn) and also cholesteric-isotropic phase transition have been studied. Potential applications of these systems are color filters, UV ima…