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。
We report the synthetic proof-of-concept for a three-faced particle based on a PAMAM dendrimer in which each face bears a different labile protecting group. This new strategy yields a controlled, well-defined and monodisperse dendrimer. To achieve this, a tri-orthogonal strategy was employed through Sonogashira coupli…
Abstract Manganese zinc oxide semiconductor thin films have been deposited by sol-gel process on glass substrate which was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and UV-Vis spectroscopy (UV-Vis). The as deposited thin films on g…
Phenomenology and nature of changes in the grain structure of the magnesium alloy МА14 hot-pressed rod under multi-step isothermal forging to total strain of 10,2 in the temperature range of 200-400 0С were analyzed. It is shown, that continuous recrys-tallization is the main mechanism of transformations of the initia…
The enhancement of strength of a Cu-1.4 mass%Ni-0.25 mass%P-0.1 mass%Zr alloy, in which the Ni and P contents are about twice larger than those in commercial Cu-Ni-P alloys, has been tried by means of combining accumulative roll-bonding (ARB) process by 7 cycles and aging treatment at 350 to 450°C. For the sake of com…
Centrifugal casting technique has been widely used to produce long products, such as pipes. In this casting, sometimes problems such as macroscopic segregation arise. However, we have not found effective countermeasures. This reason may be attributed to the fact that solidification under being applied centrifugal forc…
Zinc Oxide nanoparticles in the size range of ~18 - 23 nm are prepared using wet chemical method. Hydrogen concentration in the samples was obtained by drying the precipitate at various temperatures. XRD pattern showed a single phase wurzite structure for ZnO nanoparticles. Average crystallite sizes and lattice parame…
(Mn,Fe) codoped ZnO nanowires were synthesized on silicon substrates in situ using a chemical vapor deposition method. The structure and property of the products were investigated by X-ray, electron microscopy, Raman, photoluminescence, and superconducting quantum interference device magnetometer. The doped nanowires…
Reactive milling and thermal processing methods were used to prepare a large variety of perovskites like ABO3 and La2NiO4. The single-phase nanoparticle of ABO3 was synthesised at different milling times in dependence on the starting oxides. The grain size of ABO3 nanoparticles in the range of 10-30 nm was conditional…
A study on optical and electrochemical properties resulting upon interaction of Schiff base ligands with gold nanoparticles is presented. The measurements of the optical absorption and fluorescence properties have provided important information about structure-properties dependence. We show that in function of the iso…
New aromatic polyhydrazides bearing redox-active pyrenylamine unit were prepared from the polycondensation reactions of N,N-di(4-carboxyphenyl)-1-aminopyrene with terephthalic dihydrazide (TPH) and isophthalic dihydrazide (IPH), respectively, via the phosphorylation reaction. These two hydrazide polymers could be furt…
A pair of luminescent heterometallic lanthanide-transition-metal coordination polymers, namely, [PrLAg(3)(SCN)(6)·H(2)O](n) (1) and [PrLAg(3)(SCN)(6)](n) (2) [L = 2,6-di(pyrazol-1-yl)pyridine], have been obtained with different cooling rates under solvothermal conditions. The two structures are pseudo- supramolecular…
A facile approach to the development of multifunctional freestanding films consisting of polyelectrolytes (PEs) and polyelectrolyte complexes (nPECs) with highly embedded metal nanoparticles (NPs) was demonstrated. The composite films (nPEC/PE) containing NPs exhibited controllable properties that can be exploited by…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Antonio L. B. Pinheiro, Aparecida M. C. Marques, Ana Paula C. de Sousa, Jouber M. S. Aciole, Luiz…
Objective:To develop a simple rapid procedure for bioreduction of silver nanoparticles(AgNPs)using aqueous leaves extracts of Catharanthus roseus(C.roseus).Methods:Characterization were determined by using UV-Vis spectrophotometry,scanning electron microscopy(SEM),energy dispersive X-ray and X-ray diffraction.Results:…
Purpose: The paper deals with the investigation of secondary phases evolution during quenching, quenching and tempering in the high – chromium martensitic GX12CrMoVNbN9-1 (GP91) cast steel. It also includes the analysis of evolution of secondary phases in the as - cast condition and after stress relief annealing at th…
Young's modulus (Y) of nanostructured materials (NSs) free of porosity is modeled with regard to the coordination number imperfection at grain boundaries. In light of it, Y of NSs is suppressed substantially in the whole solid temperature range, differing from the case of nanocrystals (NCs) where Y is enhanced at lowe…
Uniform "core-satellite" structured nanoparticles containing organic dye incorporated in the silica shell and fluorescence quenching Au nanoparticles have been synthesized with excellent fluorescent properties, and their targeted imaging application in tumor cells has been investigated.
Radiation characteristics of an electric dipole located in unbounded chiral nihility metamaterial are studied. For this purpose, expressions for radiated electric and magnetic fields due to electric dipole are derived in terms of cylindrical wave functions using the vector potentials. It is noted that electric dipole…
Visible photoluminescence properties of mesoporous nanocomposites of carbon and silicon dioxides prepared using the triconstituent co-assembly method is reported. Intense white-light emission from the nanocomposites was observed at room temperature, under 370-nm light irradiation after proper carbon desorption by air-…
We report an interesting finding that the catalytic performance of Pd/Al2O3-Ce0.6Zr0.4O2 catalyst toward complete oxidation of methanol at low temperature could be greatly enhanced by prereduction in hydrogen. The light-off temperature (T50) could be reached rapidly at 67 °C. TPR patterns showed that the reducibility…