Materials Literature
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There is a flourishing interest in dermal toxicology because of environmental and occupational exposures and the development of novel transdermal drug delivery systems. Skin is one of the largest organs of the body and is the primary barrier to absorption from the environment. Because of its accessibility and continuou…
Toward the end of the 1980s, Hannes de Lange, a graduate student then at the University of Stellenbosch in South Africa, carried out a most unusual experiment on the plant that he had chosen to study for his dissertation. The plant, false heath (Audouinia capitata, Bruniaceae), grows in the fynbos, the magnificent bot…
Batch-cooling crystallization is an important industrial unit operation often carried out from aqueous solutions. Measurement of crystal size and shape plays a major role in crystallizer control in order to improve product quality. Certain crystals grown from solution may exhibit polymorphism, which can significantly…
Abstract The first‐principles full potential linearized augmented plane‐wave method within density‐functional theory is used to investigate electronic structure and magnetism of wurtzite (WZ) crystal structure SrC. It is shown that the WZ SrC is a true half‐metallic ferromagnet with a magnetic moment of 2 μ B per form…
An experiment has been performed to investigate the cooling performance of a thermoelectric ceiling cooling panel (TE-CCP). The TE-CCP was composed of 36 TE modules. The cold side of the TE modules was fixed to an aluminum ceiling panel to cool a test chamber of 4.5 m3 volume, while a copper heat exchanger with circul…
We have studied the local crystal structure of a multiferroic system BiMnO 3 by means of atomic pair distibution function (PDF) analysis on neutron powder diffraction data. The domains with space group P 2 or P 2 1 whose atomic shifts break a symmetry of C -center exist in the bulk BiMnO 3 with a space group C 2, whic…
A green and simple route to silica nanoparticles with tunable size, structure and stability is presented. Hybrid nanoparticles containing alginate, a polysaccharide, and silicates are obtained using the well-established spray drying technology. Subsequent exposure to water leads to the release of alginate and the part…
Abstract BACKGROUND: A new processing method for polypropylene–untreated precipitated silica (PP/SiO 2 ) composites based on the incorporation of a second polymer phase of polyamide 6 (PA6) is presented and compared with a more classic one making use of compatibilizers: glycerol monostearate (GMS), ethylene acrylic ac…
Single crystalline ZnO films were grown on Cr compound buffer layers on (0001) Al2O3 substrates by plasma assisted molecular beam epitaxy. In terms of lattice misfit reduction between ZnO and substrate, the CrN and Cr2O3/CrN buffers are investigated. The structural and optical qualities of ZnO films suggest the feasib…
M\"ossbauer spectroscopy has been applied for studying the local environment of $^{57}\mathrm{Fe}$ probe atoms within iron-doped $\mathrm{Ca}{\mathrm{Mn}}_{7}{\mathrm{O}}_{12}$ manganite with a perovskite-like structure. The $^{57}\mathrm{Fe}$ spectra recorded in the paramagnetic temperature range $90\phantom{\rule{0.…
The pitch value P of a chiral nematic liquid crystal is a critical parameter for azimuthal anchoring strength measurement. The Grandjean-Cano wedge method is a conventional technique for pitch determination, but the perfect wedge cell with known angle and uniform disclination lines are required. In this work, we have…
Abstract The thermoluminescence (TL) glow curve recorded after gamma‐irradiation at room temperature of Mn 2+ ‐doped MgF 2 phosphor shows two intense TL peaks at 364 K and 420 K accompanied by several weaker peaks up to 600 K. The TL spectra have shown Mn 2+ luminescence at about 560 nm. The 364 K TL peak disappears a…
Novel ruthenium−acetylide dendrimers were synthesized by using tris(4-ethynylphenyl)amine as the bridging ligand up to the second generation by a convergent method. Multistep reversible redox behavior in the cyclic voltammogram and a bathochromic shift with an increase in the number of ruthenium species except for the…
Erbium doped β-Ga(2)O(3) nanowires and microwires have been obtained by a vapour-solid process from an initial mixture of Ga(2)O(3) and Er(2)O(3) powders. X-ray diffraction (XRD) analysis reveals the presence of erbium gallium garnet as well as β-Ga(2)O(3) phases in the microwires. Scanning electron microscopy (SEM) i…
The magnetocaloric effect in the $(5∕2,1)$ ferrimagnetic chain is investiagted using a finite-cluster solver with central spin selection to reduce finite-size effects. We found that an enhanced magnetocaloric effect occurs at the boundary of the ground-state magnetization plateau. The calculated magnetic Gr\"uneisen p…
Abstract BACKGROUND: Poly(methyl methacrylate) (PMMA)–organoclay nanocomposites with octadecylammonium ion‐modified montmorillonite, prepared via melt processing, over a wide range of filler loading (2–16 wt%) were investigated in detail. These hybrids were characterized for their dispersion structure, and thermal and…
We measured the anisotropic magnetization processes of copper metaborate CuB 2 O 4 in detail. We propose an interpretation of the magnetization anomaly observed under the magnetic field applied perpendicular to the tetragonal axis, based on the field- and temperature-induced commensurate-to-incommensurate (C–IC) trans…
Abstract The anodic behaviour of zinc was investigated in ethanol solution containing LiCl and water. Zinc was polarised by using cyclic voltammetry and chronoamperometry techniques. During the course of the dissolution of zinc, a colloidal suspension of ZnO nanoparticles was obtained in 0.1 M LiCl/ethanol solutions t…
A series of well-aligned arrays of copper chalcogenide nanostructures, including Cu(7)S(4) and Cu(2-x)Se nanotubes with double walls have been successfully prepared by using Cu(OH)(2) nanorods as sacrificial templates. This new method is based on layer-by-layer chemical conversion and inward etching of the sacrificial…
We have performed $^{77}$Se NMR on a single crystal sample of the field induced superconductor $\lambda$-(BETS)$_{2}$FeCl$_{4}$. Our results obtained in the paramagnetic state provide a microscopic insight on the exchange interaction $J$ between the spins \textbf{s} of the BETS $\pi$ conduction electrons and the Fe lo…