Materials Literature
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Abstract While electrospinning provides an excellent preparation method for the manufacturing of polymer fibers with defined diameter, controlling the overall porosity of the resulting fiber assemblies has remained elusive, particularly at higher porosities. In this study, the use of a low‐temperature fiber collection…
Local perturbations of crystal and magnetic structure of $γ$-iron near carbon interstitial impurity is investigated by {\it ab initio} electronic structure calculations. It is shown that the carbon impurity creates locally a region of ferromagnetic ordering with substantial tetragonal distortions. Exchange integrals a…
An early-stage version of simulation package is developed for electronic structure calculation and dynamics of atom process in large-scale systems, particularly, nm-scale or 10nm-scale systems. We adopted the Extensible Markup Language (XML)-style in the input and the output of our simulation code, and developed some…
We present a variational method to calculate the exchange interactions among donor clusters in a semiconductor. Such clusters are candidates for a so-called control-qubit architecture for quantum information, where the effective exchange coupling between two atoms is controlled by the electronic state of a third. We u…
High Resolution Image Download MS PowerPoint Slide In this letter, we show using extended Mie theory simulations that the sensitivity of the surface plasmon resonance (SPR) of a dielectric core-metal nanoshell increases near-exponentially as the ratio of the shell thickness-to-core radius is decreased. The plasmon sen…
From theory and experiments, it can be deduced that materials for DC applications should not accumulate a large amount of space charge if accelerated degradation of the insulation system is to be avoided. Therefore, the characterization of DC insulation must take into account the evaluation of space charge accumulatio…
The examination of correlates of diatom community structure has long been centred on local environmental factors instead of broad-scale biogeographical factors largely because diatom distribution has been considered cosmopolitan. However, a number of recent publications have stressed the role of regional constraints s…
We report the synthesis of oligophenylene polycatenar liquid crystals incorporating 1,4‐disubstituted phenyl rings joined by a direct carbon carbon bond and some pyrimidine analogues. The nature of the linkages does appear to affect the mesomorphism significantly. The ratio of the aromatic core to the aliphatic chains…
We describe a simple cadmium−thiourea complex thermolysis route for the formation of CdS nanocrystals with controlled dispersity, crystalline phase, composition, average grain size, and band gap. Visible-light-driven photocatalytic activities for hydrogen production over the different CdS products have been compared.…
Zinc oxide (ZnO) nanoparticles (NPs) in the size range ∼7–35 nm are synthesized by ball-milling technique, and microstructural and optical properties of the NPs are studied using varieties of techniques. Results from ball-milled NPs are compared with those of the commercially available ZnO nanopowder. X-ray diffractio…
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Both reversible and irreversible changes take place as cellulosic fibers are manufactured into paper products one or more times. This review considers both physical and chemical changes. It is proposed that by understanding these changes one can make better use of cellulosic fibers at various stages of their life cycl…
The electronic structure of bilayer graphene is investigated from a resonant Raman study of the ${G}^{\ensuremath{'}}$ band using different laser excitation energies. The values of the parameters of the Slonczewski-Weiss-McClure model for bilayer graphene are obtained from the analysis of the dispersive behavior of th…
A criterion for the height of the anisotropy barrier Delta=|D|S2 in single-molecule magnets, and therefore the blocking temperature TB proportional to Delta, is presented. In particular, it is found that the anisotropy barrier does not increase with S as S2 but as S0. Consequences concerning the strategies to enhance…
High-Temperature Corrosion and Materials Applications provides answers, insights, and data to help engineers understand and resolve the types of corrosion problems that occur in power generation, chemical processing, oil and gas refining, pulp and paper, and other such industries. It discusses the basic modes of high-…
The remarkable 14-order-of-magnitude signal enhancement that can occur during Raman scattering from molecules on metallic nanostructures turns the normally weak inelastic-scattering effect into a single-molecule spectroscopic probe.
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Abstract Graphene is the first example of truly two‐dimensional crystals – it's just one layer of carbon atoms. It turns out that graphene is a gapless semiconductor with unique electronic properties resulting from the fact that charge carriers in graphene obey linear dispersion relation, thus mimicking massless relat…
The calculation of the electronic properties of materials is an important task of solid-state theory, albeit particularly difficult if electronic correlations are strong, e.g., in transition metals, their oxides and in f-electron systems. The standard approach to material calculations, the density functional theory in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and Functional Evolution of MetallacrownsGellert Mezei, Curtis M. Zaleski, and Vincent L. PecoraroView Author Information Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan 48108-1005, and Department of Chemistry, Fra…