Materials Literature
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Recently, CsTlCl 3 and CsTlF 3 perovskites were theoretically predicted to be potential superconductors if they were optimally doped. The syntheses of these two compounds together with a complete characterization of the samples are reported. CsTlCl 3 was obtained as orange crystals in two different polymorphs: a tetra…
In this paper, we present numerical simulations with local and nonlocal models under dynamic loading conditions. We show that for finite element (FE) computations of high-velocity, impact problems with softening material models will result in spurious post-bifurcation mesh dependency solutions. To alleviate numerical…
We prepared Li0.5Mn0.5Fe2O4 ferrite through chemical reaction in highly acidic solution and subsequent sintering of chemical routed powder at temperatures > 800 0C. Surface morphology showed plastoferrite character for sintering temperature > 1000 0C. Mechanical softening of metal-oxygen bonds at higher measurement te…
We report a method for making epitaxial superconducting contacts to semiconducting nanowires. The temperature and gate characteristics demonstrate barrier-free electrical contact, and the properties in the superconducting state are investigated at low temperature. Half-covering aluminum contacts are realized without t…
We have investigated optical conductivity spectra of $n$- and $p$-type Ba$_8$Ga $_{16}$Sn$_{30}$ ($α$-BGS) with type-VIII clathrate structure, at temperatures from 296\,K down to 6\,K with a terahertz time-domain spectrometer (0.2\,-\,2.5\,THz). The continuous spectra contributed from charge carriers are dispersive in…
We demonstrate how a single scanning voltage probe can be used to map the local conductivity and current density in a thin film with no a priori knowledge of the geometry of the electrical contacts. With state-of-the-art scanning voltage probes, under appropriate conditions such mapping should be possible down to nano…
The photoconductions of ultrafast InGaAs:ErAs nanocomposites at low temperatures were investigated. The parabolic Tauc edge as well as the exponential Urbach tail are identified in the absorption spectrum. The Tauc edge supports that the density of states at the bottom of conduction band is proportional to the square…
Recently, materials exhibiting colossal dielectric constant ($CDC$) have attracted significant attention because of their high dielectric constant and potential applications in electronic devices, such as high dielectric capacitors, capacitor sensors, random access memories and so on.
We present the exact spectral function for a single oxygen hole with spin opposite to ferromagnetic order within a one-dimensional CuO${}_{3}$-like spin chain. We find that local Kondo-like exchange interaction generates five different states in the strong-coupling regime. It stabilizes a spin polaron which is a bound…
Different acid-base conjugates were made by combining a range of bases and superbases with acetic and propionic acid. Only the combinations that contained superbases were capable of dissolving cellulose. Proton affinities were calculated for the bases. A range, within which cellulose dissolution occurred, when combine…
Self-healing is achieved with a dual-microcapsule system utilizing epoxy-amine chemistry in a high temperature cured thermosetting epoxy polymer. One capsule contains a modified aliphatic polyamine prepared by vacuum infiltration of polyoxypropylenetriamine into hollow polymeric microcapsules. The second capsule conta…
Mg-doped ZnFe2O4 samples were prepared by a microwave combustion method. The obtained samples were characterized by powder X-ray diffraction (XRD), high resolution scanning electron microscopy (HR-SEM), energy dispersive X-ray analysis, UV–Visible diffuse reflectance spectra (DRS), photoluminescence (PL) spectra and v…
Anisotropic (nonspherical) metal nanoparticles are of widespread research interest because changing the shape of metals at the nanoscale can provide access to materials with unique optical, electronic, and catalytic properties. The development of seeded growth syntheses has provided researchers unprecedented access to…
Atomically thin tungsten disulfide (WS2), a structural analogue to MoS2, has attracted great interest due to its indirect-to-direct band-gap tunability, giant spin splitting, and valley-related physics. However, the batch production of layered WS2 is underdeveloped (as compared with that of MoS2) for exploring these f…
Les concepts de matériaux multiferroïques et/ou magnétoélectriques permettent d’envisager de nouveaux dispositifs de mémoires plus performants et moins consommateurs d’énergie. Malheureusement de tels matériaux présentant ces propriétés à température ambiante ne sont pour l’instant pas disponibles. Les matériaux qui f…
La fonctionnalisation des biomatériaux est une stratégie probante et prometteuse développée pour favoriser l’intégration de biomatériaux dans un organisme vivant. Le dépôt de films multicouches de polyélectrolytes est une méthode de fonctionnalisation de surfaces particulièrement adaptée au recouvrement d’implants. Ce…
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The experimental analysis of particulate-filled nanocomposites butadienestirene rubber/fullerene-containing mineral (nanoshungite) was fulfilled with the aid of force-atomic microscopy, nanoindentation methods and computer treatment. The theoretical analysis was carried out within the frameworks of fractal analysis. I…
Carbon fibers are one of the most famous kinds of carbonaceous materials due to their special characteristics such as high conductivity, strength and modulus [1, 2]. They are typically produced either by pyrolyzing fibers spun from an organic precursor (e.g., Polyacrylonitrile (PAN), polyimide, mesophase pitch,…) or b…