Materials Literature
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Quantum confinement effects in bismuth (Bi) nanowires (NWs) are predicted to impart them with high thermopower values and hence make them efficient thermoelectric materials. Yet, boundary scattering of charge carriers in these NWs operating in the diffusion transport regime mask any quantum effects and impede their us…
Tape casting is widely used in industrial scale for production of multilayer ceramic capacitors or substrates for different applications. In 2009, it was successfully introduced as standard shaping technology for 3 (BSCF) are shown. The entire scope from the preparation of the used powders, the different manufacturing…
We investigate the thermodynamic and transport properties of molybdenum-doped BaFe${}_{2}$As${}_{2}$ (122) crystals, the first report of hole doping using a 4$d$ element. The chemical substitution of Mo in place of Fe is possible up to \ensuremath{\sim} 7$%$. For Ba(Fe${}_{1\ensuremath{-}x}$Mo${}_{x}$)${}_{2}$As${}_{2…
If Mn could be partly substituted by Fe, Ti-Mn-Fe alloys would be less costly than Ti-Mn alloys. Furthermore, the use of iron as a beta-stabilizing element is more suitable than the use of manganese from a situation of an element strategy. In this study, 4.26 was admitted as the average ratio of valence electrons to a…
Netzwerke bilden: Ein Diporphyrin, das eine elektronenarme Gast-Einheit trägt, bildet große polymere Aggregate mit Kopf-Schwanz-Anordnung, wie mittels Diffusions-NMR-Spektroskopie und Viskositätsmessungen bestätigt wurde. Im Festkörper werden weitverzweigte Nanonetzwerke beobachtet (siehe Bild).
We investigate the crossed Andreev reflection (CAR) in a zigzag graphene nanoribbon/superconductor/nanoribbon junction. It is shown that when the zigzag chain number of the ribbon is even and only the zero-energy mode is involved in transport either the elastic cotunneling or the local Andreev reflection could be enti…
In this paper, several widely used material models for plain concrete under dynamic loading, especially the Concrete Damage model and the Elastic–Plastic Hydrodynamic model are evaluated so as to determine an appropriate material model for engineered cementitious composite (ECC) materials under dynamic loading. The ef…
Effective grain refinement through equal channel angular pressing (ECAP) for magnesium (Mg) alloys has been demonstrated by many researchers. Although with the capability to achieve superplasticity, the batch mode nature of this method and the required repetitive processing to attain ultrafine grained structure have p…
Mechanical loss of pre-strained and hydrogen-charged specimens of 316L austenitic stainless steel has been measured by the free-decay method using an inverted torsion pendulum at frequencies around 1 Hz. It is found that in addition to known hydrogen Snoek-like relaxation process observed at about 240 K a new peak of…
Metastable beta-titanium alloys combine exceptionally low Young's modulus and high biocompatibility, thus attracting special interest in the prospect of their application as biomedical implant material. In this work, Ti-21.8Nb-6Zr (at.%) ingots were manufactured by vacuum argon melting followed by hot isothermal press…
A series of novel, precisely defined, redox-active macrocyclic and linear co-oligocarbosiloxanes containing pendant ferrocenyl moieties attached to the carbosiloxane backbones, have been synthesized via hydrosilylation reactions of the bifunctional 1,3-divinyl-1,3-dimethyl-1,3-diferrocenyldisiloxane [(CH 2 ═CH)(Fc)MeS…
The role of microstructure in susceptibility to hydrogen uptake and property degradation is being evaluated using a number of high strength pipeline steels. To do so, a cellular automaton (CA) model has been used to examine the effect of grain size, as a first step in assessing the influence of microstructure. The sim…
We study, numerically and theoretically, defects in an anisotropic liquid that couple to the extrinsic geometry of a surface. Though the intrinsic geometry tends to confine topological defects to regions of large Gaussian curvature, extrinsic couplings tend to orient the order along the local direction of maximum or m…
While numerous studies have investigated the effect of adding a block copolymer as a macromolecular surfactant to immiscible polymer blends, no such efforts have sought to alter the properties of melt-spun bicomponent core–sheath filaments with a nonreactive compatibilizing agent. In this study, we examine the effect…
Molecular models of the M-H(2) binding sites of experimentally characterised amorphous vanadium hydrazide gels are studied computationally using gradient corrected density functional theory, to probe the coordination number of the vanadium in the material and the nature of the interaction between the metal and the H(2…
Coating degradation mechanisms of thermoset coatings exposed to ultraviolet radiation and humidity at constant temperature are investigated. The essential processes, photoinitiated oxidation reactions, intrafilm oxygen permeability, water absorption and diffusion, reduction of crosslink density, and development of a t…
We investigate the electronic structures of the ferromagnetic semiconductor HgCr(2)Se(4) by using a modified Becke and Johnson exchange potential. The energy gap calculated with the experimental lattice structure is in good agreement with the experimental value. When the pressure reaches 9.0 GPa, HgCr(2)Se(4) becomes…
Surfactant-mediated synthesis of monodisperse CeO 2 nanoplates (15 nm × 50 nm, 2 nm thick) was conducted by the thermal decomposition of cerium acetate in 1-octadecene. X-ray diffraction patterns indicated selective (200) plane growth of fluorite cubic CeO 2 in the CeO 2 nanoplates, and transmission electron microscop…
A convertible lenticular liquid crystal (LC) lens architecture is demonstrated using an index-matched planarization layer on a periodically undulated electrode for the homogeneous alignment of an LC. It is found that the in-plane component of the electric field by the undulated electrode plays a primary role in the fl…
Pore genius: Sb2Te3 hexagonal nanoplates can be transformed into 3D porous network-structured Te plates by the dissolution of Sb3+ ions induced by tartaric acid (TA), the O2-assisted oxidation of Te2− ions to Te0, and a subsequent Ostwald ripening process (see picture). These Te plates can be adopted as templates for…