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。
The study of the chemical processes that occur during the synthesis of inorganic solids has attracted much recent attention. The ultimate aim of these experiments is the atomic level understanding of reaction mechanisms which lead to the formation of extended inorganic solids, so that rational design of new materials…
2-Mercaptonicotinic acid (H2mna = 2-HS(C5H3N)CO2H) gave two types of silver(I) complexes by a reaction with Ag2O suspended in aqueous media; one was a water-insoluble, DMSO-soluble yellow powder [Ag(Hmna)]6·4H2O 1 formed under acidic conditions, and the other was a water-soluble, yellow powder {Na[Ag(mna)]·H2O}n 2 for…
Electrical Engineering Magnetic Hysteresis Understanding magnetic hysteresis is vitally important to the development of the science of magnetism as a whole and to the advancement of practical magnetic device applications. Magnetic Hysteresis, by acclaimed expert Edward Della Torre, presents a clear explanation of the…
The donor–acceptor dye cassettes 1–4 were designed to capture energy at a single wavelength and to convert it to well-resolved, intense fluorescence emissions; in practice, Stokes’ shifts of 40–148 nm, quantum yields of 0.12–0.60, and efficient energy transfer was demonstrated.
The objective of this work was to investigate the efficiency of imidazole and its derivatives 4‐methylimidazole, 4‐methyl‐5‐hydroxy‐methylimidazole, 1‐lphenyl‐4‐methylimidazole, and 1‐( p ‐tolyl)‐4‐methylimidazole for corrosion inhibition of copper in 0.5 M hydrochloric acid. Corrosion inhibition was studied using pot…
By employing Fourier transform infrared spectroscopy (FTIR) and curve–fitting techniques, the degree of crystallinity of poly(ε-caprolactone) (PCL) aged at room temperature for 1 month was estimated to be 49 ± 2 %. The degree of crystallinity determined by FTIR in this work is comparable with those found by other conv…
Carbon nanofibers with a mean diameter of about 50 nm were successfully used as support for a palladium catalyst in the liquid phase selective hydrogenation of the CC bond in an α,β-unsaturated molecule: a less critical problem of mass-transfer limitation led to the obtention of a highly active and chemo-selective cat…
Polypropylene (PP)/montmorillonite (MMT) nanocomposites have been prepared by melt intercalation using organomontmorillonite and conventional twin screw extrusion. The dispersibility of silicate layers of the montmorillonite in the composites was investigated by using X-ray diffractometer and transmission electron mic…
Electrochemical polymerisation has been found to be a convenient method for the synthesis of a thin film composite of a conducting polymer (polypyrrole) and strongly luminescent CdTe semiconductor nanocrystals. Optimal conditions (relatively low anodic potential, neutral pH, aqueous solution) for the synthesis of unif…
Failures of small internal diameter vascular grafts have been caused by the lack of a stable endothelial lining to form on their artificial surfaces. Polymer surfaces can be optimized by means of proper treatment to allow a homogeneous and uniform coverage in artificial prosthesis applications. Several solutions were…
Porous gold structures with nearly regular 15 μm channels have been prepared by a novel route in which the calcium carbonate skeletal plates of echinoids (sea urchins) are used as templates.
In this article we discuss the state of the art in the field of second-order non-linear optical polymers. More specifically, we highlight those results that we think made an important contribution to the field, combined with some of our own results. We start with a general overview of all the aspects involved in chara…
Fe-ZSM-5 showed the best catalytic performance (nearly 100% N2 yield) and resistance to water vapor for selective catalytic oxidation of NH3 to N2 at a high gas hourly space velocity (2.3 × 105 h−1) among transition-metal (Cr, Mn, Fe, Co, Ni and Cu) ion-exchanged ZSM-5 catalysts.
An enzymatic method to graft hexyloxyphenol onto the biopolymer chitosan was studied. The method employs tyrosinase to convert the phenol into a reactive o-quinone, which undergoes subsequent nonenzymatic reaction with chitosan. Reactions were conducted under heterogeneous conditions using chitosan films and also unde…
Films of charge-ordered ${\mathrm{Nd}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3},$ ${\mathrm{Gd}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3},$ ${\mathrm{Y}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3},$ and ${\mathrm{Nd}}_{0.5}{\mathrm{Sr}}_{0.5}{\mathrm{MnO}}_{3}$ show insulator-metal transitions on the passage of sm…
Molecular Magnetism. Theory of Molecular Magnetism. Characterization of Molecular Magnetism. Mechanism of the Spin Alignment of Molecular Magnetism. Molecular Design and Synthesis for Organic Molecular Magnetism. Molecular Design and Synthesis for Inorganic Molecular Magnetism.
Calculation of the electric field and potential distribution is extensively performed in the design and development of nonceramic insulators for high voltage transmission applications. This paper applies a two-dimensional (2-D) and a three-dimensional (3-D) electric field analysis program to calculate the field distri…
An explanation for the chemical changes which lead to high‐rate dissolution of sulfide inclusions and hence to pit initiation is found in the composition changes induced in the sulfides as the steel cools from the melting temperature of the steel to the solidification temperature of the sulfide. In this temperature re…
L. J. Garay,1,2 J. R. Anglin,1,3 J. I. Cirac,1 and P. Zoller1 1Institut fur Theoretische Physik, Universitat Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria 2Instituto de Matematicas y Fisica Fundamental, CSIC, C Serrano 121, E-28006 Madrid, Spain 3Institute for Theoretical Atomic and Molecular Physics, Harv…
Easily accessible liquid crystals of 1-alkylimidazolium salts having a bilayer structure, are good solvents providing a partially ordered reaction environment.