Materials Literature
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Abstract Mössbauer spectroscopy has been used to investigate the hyperfine field distributions and the local spin configurations of Fe atoms in the magnetically ordered Ti(Fe 1− x Al x ) 2 compounds. The evolution of the spin arrangement of the Fe atoms was observed over the concentration range 0 ≤ x ≤ 0.25 at 5 K. Th…
The extensive utilization of zirconium-based alloys in fuel cladding and other reactor internal components in the nuclear power industry has led to the continuous improvement of these alloys. At the present moment, demands for better performing nuclear fuel cladding materials are increasing. Also, new reactor designs…
Sternenbildung: Polymeres [Fe3(μ3-O)(μ-OAc)6(H2O)3][Fe3(μ3-O)μ-OAc)7.5]2⋅7 H2O wird durch das Verknüpfen dreieckiger {Fe3(μ3-O)}-Cluster über anti-anti-verbrückende Acetatliganden hergestellt (siehe Bild; rot und blau: Fe, orangefarben: O). Spin-Frustration und weitreichende magnetische Ordnung koexistieren in dieser…
Abstract Bisphenol‐C‐epoxy‐toluene diisocyanate polyurethane (PEBCT) has been synthesized and used for the fabrication of jute, jute–rice husk (JRH), and jute–wheat husk (JWH) composites. The composites have been fabricated by hand lay‐up technique under a hydraulic pressure of 30.4 MPa at 135°C for 2.5 h. PEBCT‐J, PE…
Abstract The electrical volume conductivity σ of antimony‐doped tin oxide (ATO)–acrylate nanocomposite hybrid coatings was investigated. The relation between σ and the volume filler fraction p was analyzed for the ATO‐acrylate coatings containing ATO nanoparticles grafted with different amounts of 3‐methacryloxy‐propy…
Abstract The direct control of magnetic interactions in Cu II azido‐bridged binuclear complexes is investigated by means of explicitly correlated ab initio calculations. It is shown that in the end‐to‐end series, the shearing‐like asymmetry parameter δ = d long (Cu–N) – d short (Cu–N) should be considered as an import…
The long and short of it: Gemini surfactants with a non-Hückel diaza[12]annulene core have been synthesized (see picture). DFT computations give a minimum-energy conformation with alternate shorter and longer bonds, and with the two N substituents pointing away from each other. Studies on the aggregation of the molecu…
The complex heat capacity C(p) (*) of poly(vinyl acetate) has been measured at 20.95 mrads modulation frequency during the cooling as well as on heating at 24, 8, and 2 Kh and during cooling at 0.5 Kh. The study is complemented with (the rate-dependent) C(p,app) measured during cooling and heating at 60, 24, and 8 Kh.…
We present the conditions for room-temperature synthesis of bare, Ni-and Cu-doped ZnO nanocrystals in ethanol and their characterization. The formation of a ZnO host structure was delayed when dopant ions co-existed in the starting solutions. After ageing in mother liquors, well-crystallized doped nanocrystals were pr…
This paper describes the fine-tuning of the acidichromic properties of a coumarin-containing colorant 1 by incorporation of electron-donating and electron-withdrawing substituents on the coumarin moiety. Colorant 1 can undergo two distinct and reversible color changes under both strongly acidic and basic conditions, b…
Abstract Single crystal growth of the organic nonlinear optical crystal, L‐arginine trifluoroacetate (L‐Arg·CF 3 COOH, abbreviated as LATF) is reported. Low temperature solution growth method is employed for the growth of bulk single crystals. The cell parameters are verified by single crystal diffraction. Fourier tra…
Analysis of nanostructures is of increasing importance with advances of nanotechnology. Embedded nanostructures in thin films in particular are of recent interest. Grazing incident small angle x-ray scattering (GISAXS) has been recognized to be a powerful method to probe such embedded nanostructures; however, quantita…
dc magnetization, ac magnetic susceptibility, magnetic relaxation, electrical resistivity and x-ray powder-diffraction studies of ${\mathrm{Er}}_{0.75}{\mathrm{Dy}}_{0.25}{\mathrm{Al}}_{2}$ compound have been carried out in the temperature range of $5--300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The compound orders fer…
Abstract In the present study, metronidazole was crystallized in several solvents, according to both the “cooling crystallization” and the “crystallization by non‐solvent addition”. Particle properties, such as crystal habit, elongation ratio, and mean particle size, were determined by SEM analysis. Structural changes…
Abstract Formylporphyrins were prepared by using either the 1,3‐dithian‐2‐yl residue as a precursor for the CHO group or by the Vilsmeier reaction. Two synthetic routes for the introduction of the 1,2‐dithian‐2‐yl group were explored. Furthermore, reactions of the 1,3,5‐trithian‐2‐yl group with porphyrins were examine…
The electrodeposition of oxidation resistant iridium and iridium- rhodium coatings from non-toxic chloride molten salt electrolytes is investigated. Dense, pore free coatings on graphite, carbon- carbon and rhenium substrates were obtained. Electroformed iridium and iridium rhodium alloys have a typical columnar struc…
Two silklike proteins, [TGRGDSPAGG(GAGAGS)3AS]5 (FS5) and [TGRGDSPA-(GVPGV)2GG(GAGAGS)3AS]8 (FES8) were designed to demonstrate the superior performance as biomaterials of silklike proteins. The former protein consists of the crystalline domain sequence, (GAGAGS)n from Bombyx mori silk fibroin and cell-adhesive sequen…
Ising-like phenomenological Hamiltonians for coupled lattice processes, such as spin conversion for Fe(II) complexes and concurrent ordering of solvent molecules, are considered. The model is shown to account for experimental data including the temperature dependence of magnetization data, the structural changes assoc…
Ferrofluids are attractive candidates for magnetic targeting system because of their fluidity and magnetism. The magnetic nanoparticles in ferrofluids should have combined properties of superparamagnetic behavior, target localization, and biocompatibility. The magnetic targeting and biocompatibility of superparamagnet…
Sharp melting that has been found for DNA-linked nanostructure systems such as DNA-linked gold nanoparticles enhances the resolution of DNA sequence detection enough to distinguish between a perfect match and single base pair mismatches. One intriguing explanation of the sharp melting involves the cooperative dehybrid…