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。
Neutron-powder-diffraction experiments on ${}^{154}{\mathrm{SmNiO}}_{3}$ and ${}^{153}{\mathrm{EuNiO}}_{3}$ at different temperatures have been performed. At variance with the case of Pr and Nd nickelates, the metal-insulator transition temperature in these compounds are different from the N\'eel temperature (${T}_{M\…
In X-ray crystallography, a least-squares structure refinement is used to two purposes: to prove the correctness of the proposed model and to improve it. In electron crystallography, the same tool would be desirable. However, the standard programs for least-squares structure refinement used in X-ray diffraction may gi…
Reduction potential and lipophilicity of the copper(II) bis(thiosemicarbazone) complexes can be independently controlled by alkylation in the diketone backbone and the N-termini of the ligand, allowing optimisation of radiopharmaceuticals strongly selective for hypoxic tissues.
High valent metal–oxo species have been evoked as active intermediates in many different oxidation reactions using manganese or iron porphyrin complexes as catalysts and oxygen atom donors (H2O2, PhIO, NaOCl, KHSO5, ... etc.) or dioxygen associated to a reductant as oxygen atom source. When these metalloporphyrin-cata…
PowderCell contains a comfortable, user friendly visualization and modification tool for crystal structures. It provides on-line calculation of the corresponding powder diffraction patterns simulating a variety of experimental conditions. The common ICSD and Shelx file formats are supported for importing crystal struc…
It has been commonly assumed that electrostatic interactions between chromophores that exhibit large second hyperpolarizabilities β can be neglected in estimating electro-optic and second-harmonic coefficients, which can be achieved by electric-field poling of chromophore-containing polymers. Macroscopic optical nonli…
[Mn(BS)(H 2 O)]ClO 4 and [NEt 4 ] 3 [Fe(CN) 6 ] react in methanol or ethanol to give a binuclear [NEt 4 ] 2 [{Mn(BS)(S)}{Fe(CN) 6 }], 1, three trinuclear [NEt 4 ][{Mn(BS)(S)} 2 {Fe(CN) 6 }], 2 − 4, and a pentanuclear [Mn(BS)(S)] 4 [Fe(CN) 6 ]ClO 4, 5, heterometal complex, depending on the nature of the quadridentate S…
The purification and characterization of triose-phosphate isomerase from the psychrophilic bacterium Vibrio marinus (vTIM) is described. Crystal structures of the vTIM-sulfate complex and the vTIM-2-phosphoglycolate complex (at a 2.7-A resolution) are also presented. The optimal growth temperature of Vibrio marinus is…
Continuous mesoporous silica thin films with three-dimensional (3-D) accessible pore structures (Pm3n, P63/mmc space groups) have been prepared by a dip-coating technique using cationic surfactants as the structure-directing agents in nonaqueous media under acidic conditions.
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTComparative Study of Dodecanethiol-Derivatized Silver Nanoparticles Prepared in One-Phase and Two-Phase SystemsSo Young Kang and Kwan KimView Author Information Department of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea Cite this…
Mechanisms of water treeing are reviewed. A definition of water trees is proposed on the basis of permanent the hydrophilic character and the reduced breakdown strength. Properties are discussed that are relevant to the water tree definition and to the inception and propagation mechanism. This includes the water conte…
The thermodynamic effects of microstresses on the formation of polydomain heterostructures are considered. The microstresses arise due to the periodic deviation of the actual misfit from the average misfit on the interfaces between a polydomain layer and neighboring layers. The thermodynamic analysis is restricted to…
Making use of extensive scanning electron microscopy and the Rietveld analysis of X-ray diffraction profiles, we have studied the morphology, crystal habits and phase compositions of crystals of calcium carbonate grown on modified organic surfaces by precipitation from solution. The studies have been aimed at modeling…
This study describes the characteristics and effect of gamma (γ)‐NiOOH on cell performance and a method to quantify it in NiCd and NiMH battery systems. γ‐NiOOH is formed in nickel electrodes under conditions of aging, high percent overcharge, charge rates, and electrolyte concentrations. Formation of this phase resul…
The evolution of deformation—;microfracture damage below Hertzian contacts in a coarse‐grain Ti 3 SiC 2 is studied. The Hertzian indentation stress—;strain response deviates strongly from linearity beyond a well‐defined maximum, with pronounced strain—;softening, indicating exceptional deformability in this otherwise…
The development of biomaterials with desirable biocompatibility has presented a difficult challenge for tissue engineering researchers. First and foremost, materials themselves tend to be hydrophobic and/or thrombogenic in nature, and face compatibility problems upon implantation. To mediate this problem, researchers…
Through an atmosphere-controlled method, a new phase of hydrotalcite-like Co hydroxide with mixed valent states has been synthesised, along with preparations of known α and β phases. Structural and thermal behaviours of all the Co hydroxides have been compared. Three major stages of decomposition are found: (i) 149-16…
Dieses Buch ist Teil unserer neuen Datenbank Anorganik Online . Seit Jahrzehnten das Standard-Lehrbuch der Kristallographie. Dieser Klassiker wird besonders dem interdisziplinären Charakter der Kristallographie gerecht. Anwendungsbezogene Erkenntnisse wie die technisch wichtige Kristallzüchtung, die Kristallisation in…
Two solution‐based methods, metallo‐organic decomposition and sol—gel processes, were used to study the effects of precursor solution type on the microstructure evolution and texture development of oriented PZT films. Microstructure development and perovskite content are strongly dependent on the heating rate. Fast he…
The hydrothermal reaction of Cu(SO4)·H2O, MoO3, 4,7-phenanthroline and water yields [{Cu3(4,7-phen)3}2{Mo14O45}], a material exhibiting a two-dimensional network constructed from (Mo6O19)2– and (Mo8O26)4– clusters linked through planar cyclic {Cu3(4,7-phen)33}+ clusters.