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 origin of complex superstructures of biomaterials in biological systems and the amazing self-assembly mechanisms of their emergence have attracted a great deal of attention recently. Mimicking nature, diverse kinds of hydrophilic polymers with different functionalities and organic insoluble matrices have been desi…
BACKGROUND: Adoptive cell therapy with allogenic NK cells constitutes a promising approach for the treatment of certain malignancies. Such strategies are currently limited by the requirement of an efficient protocol for NK cell expansion. We have developed a method using synthetic nanosized phosphonate-capped dendrime…
The phase relations and electrical properties of (1- x )(Bi 1/2 Na 1/2 )TiO 3 – x Ba(Al 1/2 Nb 1/2 )O 3 (abbreviated as BNT–BAN100 x ) ceramics were investigated in detail. The morphotropic phase boundary (MPB) between the rhombohedral ferroelectric and pseudocubic (tetragonal) relaxor phases of BNT–BAN100 x was deter…
A new strategy for the sintering of transparent lanthanum‐doped yttrium oxide was presented. This method is the extension of the well‐accepted two‐step sintering process for the densification of nanomaterials. The samples were firstly sintered at an intermediate temperature T1 (1450°C) in air. Then the temperature dec…
Using molecular dynamics simulations, we study the slow dynamics of a hard sphere fluid confined in a disordered porous matrix. The presence of both discontinuous and continuous glass transitions as well as the complex interplay between single-particle and collective dynamics are well captured by a recent extension of…
SrCu 3 Ti 4 O 12 , La 2/3 Cu 3 Ti 4 O 12 , and Bi 2/3 Cu 3 Ti 4 O 12 ceramics were representatively investigated to obtain a systematical understanding about the dielectric behaviors of the compositionally and structurally CaCu 3 Ti 4 O 12 ‐like oxides and the underlying related mechanism. In opposite to the literatur…
A colloidal suspension of exfoliated, layered cobalt oxide nanosheets has been synthesized through the intercalation of quaternary tetramethylammonium ions into protonated lithium cobalt oxide. According to atomic force microscopy, exfoliated nanosheets of layered cobalt oxide show a plateau-like height profile with n…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTSyntheses of Biodegradable and Biocompatible Polymers by Means of Bismuth CatalystsHans R. KricheldorfView Author Information Institut für Technische und Makromolekulare Chemie, Bundesstrasse 45, D-20146 Hamburg, GermanyCite this: Chem. Rev. 2009, 109, 11, 5579–5594Publicatio…
The nonlinear viscoelastic behavior of the composites of natural rubber filled with surface-modified nanosilica was studied with reference to silica loading. The effect of temperature on the nonlinear viscoelastic behavior has been investigated. It was observed that Payne effect becomes more pronounced at higher silic…
The direct low-temperature oxidation of methane to methanol is demonstrated on a highly active homogeneous molecular catalyst system and on heterogeneous molecular catalysts based on polymeric materials possessing ligand motifs within the material structure. The N-(2-methylpropyl)-4,5-diazacarbazolyl-dichloro-platinum…
A fabrication of ZnO hierarchical mesocrystal was achieved by a biomimetic method using gelatin as structure-directing agent. It was found that the ZnO−gelatin microcrystal with well-defined hexagonal twin plate shape is built by the stacking of nanoplates. The irregularly edged nanoplates can adjust themselves to eac…
By using a multiscale theoretical method, which combines the first-principles calculation and grand canonical Monte Carlo (GCMC) simulation, we studied storage capacities of methane in 3D covalent organic frameworks (COFs) and their Li-doped compounds at T = 243 and 298 K. Our results predicted that, at T = 298 K and…
Core–corona composites were prepared by incorporating a hydrophilic polyoxometalate (POM) into poly(styrene-b-4-vinyl-N-methylpyridinium iodide) matrices in acidic aqueous solution (see scheme). On dispersal in toluene they self-assemble into micellar and vesicular morphologies (see TEM images), which can be controlle…
This paper investigates the behavior of colloidal suspensions of alumina particles during directional solidification, by in situ high‐resolution observations using X‐ray radiography and tomography. This second part is focussed on the evolution of ice crystals during steady‐state growth (in terms of interface velocity)…
Eu1-xYxMnO3 exhibits, unlike other magnetoelectric systems, very distinctive features. Its magnetoelectric properties is driven by the magnetic spin of the Mn3+ ion, but they can be drastically changed by varying the content of Y3+, which it does not carry any magnetic moment. Though the x = 0.40 composition has been…
We calculate that the electron states of strained self-assembled Ge/Si quantum dots provide a convenient two-state system for electrical control. An electronic state localized at the apex of the quantum dot is nearly degenerate with a state localized at the base of the quantum dot. Small electric fields shift the elec…
We consider a two-dimensional crystalline monolayer of carbon atoms with a single non-magnetic impurity. Using the Weyl Hamiltonian to describe electronic energy spectrum near the Dirac points, we calculate the wave function and energy of impurity states, as well as the induced magnetic moment associated with polariza…
We report first principles investigation of time-dependent current of molecular devices under a step-like pulse.Our results show that although the switch-on time of the molecular device is comparable to the transit time, much longer time is needed to reach the steady state. In reaching the steady state the current is…
By incorporating the proper boundary conditions, we analytically derive the impulse response (or "Green's function") of a current-sensing spin detector. We also compare this result to a Monte-Carlo simulation (which automatically takes the proper boundary condition into account) and an empirical spin transit time dist…
We employ Faraday and Kerr effect spectroscopy in the infrared range to investigate the electronic structure of Ga_{1-x}Mn_{x}As near the Fermi energy. The band structure of this archetypical dilute-moment ferromagnetic semiconductor has been a matter of controversy, fueled partly by previous measurements of the unpol…