Materials Literature
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Mesoporous nickel cobalt oxide hierarchical structures are successfully synthesized by a controlled calcination of nickel cobalt oxalate hydrate hierarchical structures. More importantly, a mesoporous nickel cobalt oxide hierarchical structures modified electrode shows remarkable electrochemical performance for non-en…
Titanium alloys enhance the quality and longevity of human life by replacing or treating various parts of the body. However, the aggressive body fluids lead to corrosion and metal ions dissolution. These ions leach to the adjacent tissues and causes adverse reactions. Surface modifications improve corrosion resistance…
A class of Yb³⁺/Er³⁺ ion co-doped CaLa₂ZnO₅ (CLZ) novel up-conversion (UC) phosphors were synthesized by a sol–gel method. The crystal structure and the phase composition of the samples were characterized by X-ray diffraction (XRD). Under 980 nm excitation, UC spectra are composed of three prominent emission bands cen…
The electrical properties of Sr₁₋₃ₓLa₂ₓTiO₃ ceramics (x = 0.05, LST) change dramatically with sintering temperature and atmosphere. Ceramics sintered at 1200 °C in both O₂ and N₂ exhibit near intrinsic band-type conduction with bulk conductivity ∼10⁻⁷ S cm⁻¹ at 500 °C and activation energy for conduction, Eₐ of ∼1.6–1…
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Die Methanbildung aus H2 und CO2 ist die einzige Energie-liefernde Reaktion in vielen methanogenen Archaeen. Pro Mol gebildetem Methan werden vier Mol H2 verbraucht. Der Wasserstoff wird dabei durch Hydrogenasen aktiviert, wovon es in den meisten hydrogenotrophen Methanbildnern drei unterschiedliche [NiFe]-Hydrogenase…
We have labelled cellulose nanofibrils with rhodamine B and characterized the grafting and the fluorescent properties by infrared and UV/visible spectroscopy together with fluorescence spectroscopy and confocal laser scanning microscopy. The cellulose nanofibrils were surface modified with amine groups using 4-(Boc-am…
A carbazole-based D–π–A benzoxazole derivative was found to self-assemble into long fibers, and its emission increased because of the presence of J-aggregates. These fibers exhibited a distinctive response to volatile acid vapors. The vapor of strong acids such as hydrochloric acid or trifluoroacetic acid destroyed th…
Research on bio-composites is important because of its positive environmental impact. In this study, bio-composites based on plasticised cellulose acetate and kenaf fibers were prepared by solution casting and compression moulding methods. The fibers were chemically treated to remove lignin, hemicellulose and impuriti…
The oxygen permeation performance of perovskite La₀.₆Sr₀.₄Co₀.₂Fe₀.₈O₃₋δ (LSCF) hollow fibre membranes was enhanced by surface modification via coating of a Ba₀.₅Sr₀.₅Co₀.₉Nb₀.₁O₃₋δ (BSCN) porous layer. The hollow fibres were characterized by XRD, SEM and EDS elemental mapping and tested for air separation. Experiment…
MATVEENKO N. V., SHALOBYTA N. N., MALINOVSKY V. N. About possibility of use of the program complex MSC.Nastran for the analysis strain-stress condition of reinforced concrete elements
A bimetallic Schiff base-metal complex [Ni(L)Na(CH₃CN)(ClO₄)] (1) and a coordination polymer [Zn₂(L)(N₃)₂]ₙ (2) (H₂L = N,N′-bis(3-methoxysalicylidehydene)cyclohexane-1,2-diamine) have been synthesized and characterised by IR, elemental analyses and single crystal X-ray diffraction. The solid state structure reveals th…
Lithium-rich layered Li[Li₀.₂Mn₀.₅₄Ni₀.₁₃Co₀.₁₃]O₂ is prepared by a fast co-precipitation method and surface modified with conducting polyaniline (PANI, 5 wt%, 10 wt%, 15 wt%, 20 wt%, 30 wt% theoretically) via in situ chemical oxidation polymerization to optimize the electrochemical properties. The uniform PANI layer…
平面磁性的 metamaterial 的一种类型为磁性的回声成像(MRI ) 作为 superlens 与方形的弯屈微观结构被建议应用程序。印射测量的一个直接磁场证明通过 superlens 的无线电频率磁场被增加由在在 superlens 后面的大约 3 厘米的位置象 46.9% 一样高。制作平板的回声频率被发现为一个 1.5T MRI 系统在对目标频率(63.6 MHz ) 的好同意。MRI 与图象和 SNR (signal-to-noise 比率) 的紧张两个都被提高的磁性的 superlens 表演试验，暗示答应我们的平面磁性的 superlens 的 MRI 应用程序。
The low cost production of Ti-containing nanomaterials from natural resources is an attractive method for producing materials suitable for the growing energy storage industry. In this work, natural ilmenite is transformed into either Li₄Ti₅O₁₂ microspheres or TiO₂ nanowires through a series of chemical and thermal pro…
In this work, a Density Functional Theory (DFT) study has been carried out to investigate the structural and electronic properties of H₃PO₄/ZSM-5 (extra-framework and framework modification). Cluster models at different T sites (T6, T9, and T12) are suggested. The local structure of the extra-framework modified cluste…
In this work, wood plastics composites (WPC) were produced by injection molding and characterized in terms of density, hardness, morphology and mechanical properties (impact, flexural and tensile). In particular, the initial material used (linear low density polyethylene as the matrix and maple wood flour as reinforce…
以FeCl3·6H2O为前驱物，N，N-二甲基甲酰胺为溶剂，1，2-环氧丙烷为凝胶促进剂，采用溶胶．凝胶法制备RDX／Fe203湿凝胶，利用超临界C02萃取干燥法得到纳米复合含能材料RDX／Fe2O3。利用SEM、FTIR、DSC等对样品的微观形貌、组分结构和热分解特性进行了研究，并测试了其撞击感度和摩擦感度。结果表明，与传统的简单混合物RDX—Fe2O3相比，运用该方法制备的RDX／Fe2O3纳米复合含能材料可在纳米级上将2种物质混合，其组分-致性更好；纳米复合含能材料RDX／Fe2O3的热分解过程与RDX—Fe2O3不同，其DSC曲线上的熔解吸热峰消失，分解放热峰的起始温度提前了近20qc，放热量由1082．33J／g提高到了…
This article describes the method of definition of acoustic-emission characteristics of aircraft with the use of parametric registering devices on superhigh frequencies and optical beams. The results of the research of acoustic response and bandwidth of registering devices when using those beams are given.
Quantum spectroscopy utilizes the quantum fluctuations of the light source to characterize and control matter. More specifically, desired many-body states can be directly excited to the semiconductor by adjusting light source's quantum fluctuations. The method is experimentally realizable by projecting an extensive se…