Materials Literature
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Abstract Ni + W, Ni + W + Si and Ni + W + Mo + Si composite coatings were obtained by electrolytic codeposition of crystalline nickel from an electrolyte containing suspension of W, Mo and Si powders. These coatings were obtained under galvanostatic conditions, at the current density of j dep . = 0.100 A cm −2 and at…
The study is concerned with the luminescence properties of ensembles of semiconductor structures containing organic phthalocyanine molecules with erbium ions as complexing agents. The photoluminescence spectra of the structures of the type of erbium monophthalocyanine, bisphthalocyanine, and triphthalocyanine are reco…
This paper is dealing with structural foam moulding of polypropylene (PP) thermoplastics utilising the MuCell approach to introduce the blowing agent as well as advanced moulding technologies. Till today, structural foam moulding is facing several different challenges, which are limiting a full acceptance in industria…
Highly monodisperse superparamagnetic iron oxide nanoparticles (SPIONs, 7.5 nm gamma- F2O3) were synthesized by thermal decomposition of iron pentacarbonyl and consecutive aeration in organic medium. By treating with a small amount of iron pentacarbonyl, Fe-rich surface has been formed on SPION. Water-dispersible SPIO…
The electronic structure and molecular orientation of dibenzo-18-crown-6 deposited on graphite were studied by ultraviolet photoelectron spectroscopy and metastable atom electron spectroscopy. We observed an alternate orientation of the molecule in the first monolayer and second layer. Moreover, the energy separations…
Annealing to several hundred Kelvin has been recently shown to induce densification in compressed SiO2 glass. By means of an ab-initio parameterised interatomic potential for SiO2 and molecular dynamic simulations, we studied the structural properties of compressed glass by cold compression at room temperature and by…
Abstract Based on uni-axial tensile testing, the performances of bi-axial warp knitted PET/PVC flexible composites has been analyzed in seven in-plane directions, i.e., 0°,15°,30°,45°,60°,75° and 90°. The crack propagation of each sample has been observed and analyzed by evaluating the influence of the crack length an…
High pressure-induced spectral changes in a 20-nm cubic nanocrystalline yttria doped with europium and its corresponding bulk were studied in the range of 550-750 nm, corresponding to the 5D0 --> 7Fd (J = 0-4) transitions. The results demonstrate that the bulk Y2O3 underwent phase transition from the cubic phase to th…
Rare-earth ion doped bismuthate (LZBB) glasses without traditional glass formers, lead and cadmium, have been attempted to prepare. In Er3+ doped LKBB glass system, Judd–Ofelt parameters Ω2, Ω4, and Ω6 have been derived to be 3.48×10−20, 9.47×10−21, and 1.01×10−20cm2, respectively, which shows a medium symmetry of the…
Methods for the synthesis of iron(II) complexes with 1,2,4-triazole (HTrz) and 4-amino-1,2,4-triazole (NH2Trz) containing the decahydro-closo-decaborate ion [B10H10]2-were developed. The empirical formulas of the complexes were Fe(HTrz)3B10H10 · H2O (I) and Fe(NH2Trz)3B10H10 · H2O (II). The complexes were examined by…
High Resolution Image Download MS PowerPoint Slide We describe simultaneous spectroscopic and solid-state electronic operation of a single-walled carbon nanotube (SWNT) thin film device under the influence of NH 3 and NO 2 gases. Using this simultaneous approach we show that both the optical absorbance and network con…
Problem of the distribution of clay minerals in water areas of the World Ocean and their relation to different (humid, arid, and volcanosedimentary) types of lithogenesis is considered. It is shown that layer silicates can be used as index minerals for distinguishing types of lithogenesis under conditions of marine se…
Abstract Photo-excitation and size-dependent Raman scattering studies on the silicon (Si) nanostructures (NSs) prepared by laser-induced etching are presented here. Asymmetric and red-shifted Raman line-shapes are observed due to photo-excited Fano interaction in the quantum confined nanoparticles. The Fano interactio…
Abstract An in situ forming implant (ISFI) is a novel drug delivery system used for protein and peptide delivery, especially for cancer treatment. An ISFI based on 33% (w/w) poly( D,L ‐lactide‐ co ‐glycolide)(PLGA; 50:50)/3% (w/w) leuprolide acetate (LA)/64% (w/w) N ‐methyl‐2‐pyrrolidone (NMP) was prepared for this st…
Single-phase zinc sulphide (ZnS) quantum dots were synthesized by a chemical method. The influence of the pH value of the Zn(CH3COO)2 solution on the size and photoluminescence properties of the ZnS quantum dots was evaluated. X-ray power diffraction, transmission electron microscopy, and ultraviolet-visible spectrosc…
Microwave magnetic properties are studied for rhombohedral structure Nd 2 Fe 17 N 3-δ with planar magnetic anisotropy Its resin composites show the permeability μ' 0 = 4.15 at low frequency, the natural resonance frequency f r = 1.71 GHz and the resonance bandwidth 6.66 GHz. The calculated static permeability of Nd 2…
The injection molding of microcellular polymers is expected to be increasable promise for engineering applications. The combined effect of precision mold opening and gas counterpressure process produced uniform microfoam structure with a maximal cell diameter less than 10 μm/1/. The nature of microcellular PP and PC/A…
We briefly summarize a perspective on high-temperature oxide superconductors (HTC) as systems of intrinsic, functional, and connected spatial scales, with an associated set of temporal scales. We emphasize the importance of local bonding constraints, leading to a framework of coexisting short- and long-range fields, a…
CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV–visible light absorption peaks, and t…
Abstract Tapioca starch, poly(lactic acid) and Cloisite 30B nanocomposites foams, with clay contents of 1, 3, 5 and 7% (w/w), were prepared by a melt‐intercalation method. Multiple inputs single output models were developed to predict radial expansion ratio, unit density, bulk compressibility and spring index of the n…