Materials Literature
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SUMMARY The aim of the present work is to develop a new finite element model for the finite strain analysis of plate structures constituted of shape memory alloy (SMA) material. A three‐dimensional constitutive model for shape memory alloys able to reproduce the special thermomechanical behavior of SMA characterized b…
The widely applied desulfurization technologies for flue gas are based on the acidic property of SO 2 . However, CO 2 is also acidic, and the content of CO 2 in flue gas is several orders higher than that of SO 2; therefore, the interference of CO 2 on desulfurization is a problem and an origin of secondary pollution.…
Two transferable physical parameters are incorporated into the Su-Schrieffer-Heeger Hamiltonian to model conducting polymers beyond polyacetylene: the parameter γ scales the electron-phonon coupling strength in aromatic rings and the other parameter ε specifies the heterogeneous core charges. This generic Hamiltonian…
In this paper three different types of fractals will be defined which can be easily fabricated at high nanoscale resolution using the standard lithographic technique. The structures obtained in this way are suitable for modern applications in the field of metamaterials intended to revolutionise present optical devices.
We present an investigation of the ordering in a nematic liquid-crystal film confined between two cylindrical surfaces with antagonistic (radial and planar) anchoring alignments. A Monte Carlo study of a Lebwohl-Lasher model with suitable boundary conditions has been performed to calculate the ordering and the molecul…
Based on experimental results, we propose a mechanism that allows the use of metal nanostructures to synthesize hydrocarbons and carbohydrates from carbon dioxide, water and sunlight. When sunlight impinges on cobalt nanostructures in a glass chamber, its intensity is greatly enhanced around the tips of the nanostruct…
This paper deals with the longtime behavior of the Caginalp phase-field systemwith coupled dynamic boundary conditions on both state variables.We prove that the system generates a dissipative semigroup in a suitable phase-spaceand possesses the finite-dimensional smooth global attractor and an exponential attractor.
We report the preparation and electrochemical studies of a systematic series of mono- and di-nitro-substituted 2,2'-bipyridine (bipy) compounds [x-NO(2)-bipy (x = 3,4) and x,x'-(NO(2))(2)-bipy (x,x' = 3, 4, 5)] and their complexes with platinum(II), [Pt(x-NO(2)-bipy)Cl(2)] and [Pt(x,x'-(NO(2))(2)-bipy)Cl(2)]. The effe…
The methylcyclohexane-toluene-hydrogen system is a potential solution for the implementation of a successful hydrogen economy. The dehydrogenation reaction, the backbone of the methylcyclohexane-toluene-hydrogen system, is studied over 1.0 wt% Pt/θ-Al2O3. Experiments were performed in a 1.02-cm internal diameter fixed…
ZnO-Nanokristalle hoher Qualität und mit rein UV-emittierenden Eigenschaften wurden in einem neuen Mikrofluidikverfahren hergestellt, das überkritische Fluide verwendet und Keimbildungs-/Wachstums- und Funktionalisierungsschritt trennt (siehe Bild). Diese ZnO-Nanokristalle (NCs) zeigen Excitonen-Lumineszenz ohne die k…
This investigation presents data from prolonged molecular dynamics simulations of dense monodisperse polymer melts of linear polymer chains of length between N = 3 and N = 255. Hear N is number of chain coarse-grained segments. The study aim is to observe the crossover from Rouse-like dynamics for short chains to rept…
Abstract In this work, the impact of heat treatment on the real structure of Bi 2 Te 3 /Sb 2 Te 3 multilayers is investigated. The material was heated in situ in the transmission electron microscope (TEM) and ex situ inside a furnace after preparing these layers with the so‐called nanoalloying deposition technique via…
Dotierungsphänomene: Die Dotierung mit Natriumionen führt zur Bildung monodisperser extrem dünner La2O2S-Nanoplättchen mit einstellbaren selbstorganisierten Überstrukturen (siehe Bild) und robuster Fluoreszenz in Tensidlösungen. Durch die Dotierung entstehen Sauerstoff-Fehlstellen im Wirtgitter während der Sulfurierun…
A miniaturized electron probe X-ray microanalyzer (EPMA) with a small chamber including the electron source and the sample stage was realized using a pyroelectric crystal as an electron source. The EPMA we propose is the smallest reported so far. Performance of the EPMA was evaluated by investigating energy of obtaine…
This work addresses the conception of purely organic magnetic materials by properly bridging high-spin polycyclic hydrocarbons A and B, through covalent ligands L. The strategy varies two degrees of freedom that govern the magnetic character of the A-L--B sequence, namely, the bridge response to spin polarization and…
We have synthesized polycrystalline samples of Eu(1-x)K(x)Fe2As2 (x = 0-1) and carried out systematic characterization using x-ray diffraction, ac and dc magnetic susceptibility, and electrical resistivity measurements. A clear signature of the coexistence of a superconducting transition (T(c) = 5.5 K) with spin densi…
Abstract The physical properties of microcapsules are largely influenced by the synthesis conditions such as weight ratio of core/shell material, agitation rate, reaction time, and different emulsifier. Different synthesis condition would lead to different property. It is an important issue for application in composit…
The commonly used sessile drop method for measuring contact angles and surface tension suffers from errors on superhydrophobic surfaces. This occurs from unavoidable experimental error in determining the vertical location of the liquid-solid-vapor interface due to a camera's finite pixel resolution, thereby necessitat…
Abstract Smart organic–inorganic hybrids are prepared using non‐covalent interactions between water‐soluble silsesquioxane nanoparticles and two amino acid‐based block copolymers prepared by reversible addition–fragmentation chain transfer (RAFT) polymerization. A block copolymer displaying lower critical solution tem…
The ditopic ligand PyPzOAPz (N-[(Z)-amino(pyrazin-2-yl)methylidene]-5-methyl-1-(pyridin-2-yl)-1H-pyrazole-3-carbohydrazonic acid) was synthesized by in situ condensation of methyl imino pyrazine-2-carboxylate with 5-methyl-1-(2-pyridyl) pyrazole-3-carbohydrazide. In this work we have also used two of our earlier ligan…