Materials Literature
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The perpendicular magnetic anisotropy (PMA) arising at the interface between ferromagnetic transition metals and metallic oxides are investigated via first-principles calculations. In this work very large values of PMA up to 3 erg/cm$^2$ at Fe$|$MgO interfaces are reported in agreement with recent experiments. The ori…
In this research, the effects of pH, reaction temperature and holding reaction time on the synthesis of one-dimensional ZnWO4 nanostructures by a hydrothermal method were studied. Phase, morphology and atomic vibration were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM an…
We report a new reversal mechanism of magnetic vortex cores in nanodot elements driven by out-of-plane currents, occurring through two coupled edge-solitons via dynamic transformations between magnetic solitons of different topological charges. This mechanism differs completely from the well known switching process me…
Interference between different energy eigenstates in a quantum system results in an oscillation with a frequency which is proportional to the difference in energy between the states. Such an oscillation is observable in polarized positronium when it is placed in a magnetic field. In order to measure the hyperfine spli…
The magnetic insulator Gd2Sn2O7 is one of many geometrically frustrated magnetic materials known to exhibit a nonzero muon spin polarization relaxation rate, $λ(T)$, down to the lowest temperature (T) studied. Such behaviour is typically interpreted as a significant level of persisting spin dynamics (PSD) of the host…
We provide a topological understanding on phonon Hall effect in dielectrics with Raman spinphonon coupling. A general expression for phonon Hall conductivity is obtained in terms of the Berry curvature of band structures. We find a nonmonotonic behavior of phonon Hall conductivity as a function of magnetic field. More…
We study the effect of the rotation of an external electric field on the dynamics of half-integer disclination networks in two dimensional nematic liquid crystals with a negative dielectric anisotropy using LICRA, a LIquid CRystal Algorithm developed by the authors. We show that a rotation of $π$ of the electric field…
Thermal decomposition of magnesium borohydride, Mg(BH(4))(2), in the solid state was studied by a combination of PCT, TGA/MS and NMR spectroscopy. Dehydrogenation of Mg(BH(4))(2) at 200 °C en vacuo results in the highly selective formation of magnesium triborane, Mg(B(3)H(8))(2). This process is reversible at 250 °C u…
Abstract A morphotropic phase boundary driven by epitaxial strain has been observed in lead‐free multiferroic BiFeO 3 thin films and the strain‐driven phase transitions have been widely reported as iso‐symmetric Cc‐Cc by recent works. In this paper, it is suggested that the tetragonal‐like BiFeO 3 phase identified in…
We report a facile strategy to synthesize silica nanoparticles-coated graphene oxide (GO-SiO2) nanohybrids in a water-alcohol mixture at room temperature. AFM observations revealed that silica nanoparticles with ca. 50 nm in size were densely and evenly covered on graphene oxide sheets. Due to the space layer of silic…
The number of different nano- and micro-scale structures produced from the chemical oxidation of aniline into “polyaniline” is rivaled by few other organic materials. Nanoscale structures such as fibers, tubes, aligned wires, flowers, spheres and hollow spheres, plates, and even those resembling anatomical organs, ins…
Brick-and-mortar microstructures of artificial nacre-like chitosan–montmorillonite (MTM) bionanocomposite films can be readily fabricated by using chitosan–MTM hybrid nanosheets as building blocks (see picture). The fire-retardant nacre-like films have a higher mechanical performance (Young's modulus: 10 GPa, tensile…
Oxide nanomaterials are indispensable for nanotechnological innovations, because they combine an infinite variety of structural motifs and properties with manifold morphological features. Given that new oxide materials are almost reported on a daily basis, considerable synthetic and technological work remains to be do…
Magic bullets: A drug-loaded structure comprising a PEGylated (PEG=polyethylene glycol) gold nanoshell on silica nanorattle spheres (GSNs; see picture) combines remote-controlled photothermal therapy with chemotherapy. Tumor cells are killed with higher efficacy and less toxicity than the free drug.
There has been an intense surge in interest in graphene during recent years. However, graphene-like materials derived from graphite oxide were reported in 1962, and related chemical modifications of graphite were described as early as 1840. In this detailed account of the fascinating development of the synthesis and c…
Using first principles density functional theory, we investigate the structural, electronic and magnetic properties of isolated and bundled Mo(6)S(9 - x)I(x) nanowires with x = 3, 4.5, and 6. The unit cell of each system contains two Mo(6) octahedra decorated with S and I atoms and two S(3) linkages. Due to the bistab…
A new acid sensitive nanocarrier based on lipid core micelles has been investigated for tumor targeted drug delivery. Sulfadimethoxine-PEG-phospholipid unimer (SD-PEG-DSPE) was designed to endow micelles with pH responsiveness in the physiopathologic range. The unimer was synthesized according to a two-step procedure.…
We have studied synthesis, glass formation, and crystallization processes in the oxychloride barium borate system BaO-B 2 O 3 -BaCl 2 and determined the highest chlorine concentrations at which glasses can be prepared by mold casting for Ba: 2B ratios in the ranges 1.0–2.2 and 0.2–0.5. The process atmosphere has been…
Modern design approaches enable one to construct a series of theoretical designs with excellent spectral properties for almost all optical coating design problems. Selection of a practical optimal design among a variety of possible theoretical designs becomes a key issue. We demonstrate how preproduction estimations o…
A semiautomated procedure for measuring the phase diagram for enantiotropes in a dimorphic system was developed using Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR) spectroscopy and laser backscattering (Focused Beam Reflectance Measurement, FBRM) for in situ measurement of solute concentration and…