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。
Chemical synthesis of graphene relies on the usage of various chemical reagents. The initial synthesis step, in which graphite is oxidized to graphite oxide, is achieved by a combination of chemical oxidants and acids. A subsequent chemical reduction step eliminates/reduces most oxygen functionalities to yield graphen…
Mixed-metal uranium compounds are very attractive candidates in the design of single-molecule magnets (SMMs), but only one 3d-5f hetero-polymetallic SMM containing a uranium center is known. Herein, we report two trimeric heterodimetallic 3d-5f complexes self-assembled by cation-cation interactions between a uranyl(V)…
Atomistic simulations, based either on an empirical interatomic potential or on ab initio calculations, are used to study the pyramidal glide of a 1/3 <1-210> screw dislocation in hexagonal close-packed zirconium. Generalized stacking fault calculations reveal a metastable stacking fault in the first order pyramidal {…
An effective medium theory for resonant and non-resonant metamaterials for flexural waves in thin plates is presented. The theory provides closed-form expressions for the effective parameters of arrangement of inclusions or resonators in thin plates as a function of the filling fraction of the inclusions, their physic…
In the paper we propose a theoretical model that takes into account Vegard strains and perform a detailed quantitative comparison of the theoretical results with experimental ones for quasispherical nanoparticles, which reveal the essential (about 100 K) increase of the transition temperature in spherical nanoparticle…
We investigate states on the surface of strong and weak topological insulators and superconductors that have been gapped by a symmetry breaking term. The surface of a strong 3D topological insulator gapped by a magnetic material is well known to possess a half quantum Hall effect. Furthermore, it has been known that t…
Whereas wide-bandgap metal oxides have been extensively studied for the photooxidation of water, their utilization for photoreduction is relatively limited. An important reason is the inability to achieve meaningful photovoltages with these materials. Using Cu2 O as a prototypical photocathode material, it is now show…
A C3 -symmetric benzene-1,3,5-tricarboxamide substituted with ethyl cinnamate was found to self-assemble into supramolecular gels with macroscopic chirality in a DMF/H2 O mixture. The achiral compound simultaneously formed left- and right-handed twists in an unequal number, thus resulting in the macroscopic chirality…
A dispersão estável e/ou a aplicação dos nanotubos de carbono em estruturas ordenadas ou tecnologicamente aplicáveis é sempre um grande desafio em todas as áreas. A funcionalização com moléculas biológicas é uma alternativa para aumentar a solubilidade dos CNTs (carbon nanotubes) e pode favorecer o desenvolvimento de…
Experimentally refined crystal structures for metal–organic frameworks (MOFs) often include solvent molecules and partially occupied or disordered atoms. This creates a major impediment to applying high-throughput computational screening to MOFs. To address this problem, we have constructed a database of MOF structure…
ABSTRACT In the frame of this investigation, the homogeneity of six (6) ingots of aluminum alloy EN AW-5083 cast by semi-continuous vertical Direct Chill casting (DC) Process was investigated by tensile mechanical properties determination. The investigation followed the static design of the Latin square. Determination…
An improved inverse simulated annealing method is presented to determine the\nstructure of complex disordered systems from first principles in agreement with\navailable experimental data or desired predetermined target properties. The\neffectiveness of this method is demonstrated by revisiting the structure of\namorph…
Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn an…
N play an important role in determining the hardness, fracture toughness, and strength of materials. Nanoparticles with size ranging from 1-100 nm are beginning to play a strong role as additives in metals and alloys, contributing to their high hardness and low plasticity. This presentation focuses on a class of nanom…
P structures have been studied since the 1960’s by many scholars, most prominently, by Prof. Mead of the Institute of Sound and Vibration, Southampton University in the UK. In 2000, the author embarked on a journey with periodic structures, it took quite a while until he understood how it works, after those years, he…
In this comment we show that some equations and results of the paper titled\n"Dielectric screening and plasmons in AA-stacked bilayer graphene" are not\ncorrect. Furthermore, we present our results which seems to be more correct.\n
An innovative project on development of the technological method for holographic diffraction gratings production which allows to produce high-quality diffractive elements with spatial frequencies from 600 to 3600 mm–1 for spectral instruments have been carried out. The technological instructions for the implementation…
diyl)bis(azan-1-yl-1-ylidene))bis(ethan-1-yl-1-ylidene) bis(4-hydroxy-6-methyl-2H-pyran-2-one) derived from condensation of one mole diethylene diamine triamine (dien) with two moles of dehydroacetic acid have behaved tetra dentate dibasic chelating agent with all metal ions under study. Three bimetallic Cr(III), Co(I…
In article reviewed advanced theoretical probability models of process quality formation quality of the surface layer in a centrifugal rotary process (CSO) details. Process CSO reviewed from the point of view reliability. Based on the results of theoretical studies were proposed the dependence of the influence of the…
Composites fiber are moving into the crucial stream of the automobile industry, with manufacturers and suppliers finding different blends of bio composites, glass fibers and places to use them. It has been observed that natural fibers such as flax, hemp, kneaf, jute and sisal help reducing in weight, cost, and CO2, le…