Materials Literature
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An enhanced electric-pulse-induced resistance (EPIR) switching effect is observed in the Ag∕Pb0.7Zr0.3TiO3∕Pr0.7Ca0.3MnO3∕YBa2Cu3O7 (Ag/PZT/PCMO/YBCO) structures. Compared with the Ag/PCMO/YBCO devices, the insertion of the PZT buffer into the Ag/PCMO interface is found to greatly increase the EPIR ratio and significa…
INTRODUCTION. PART ONE: FABRIC ESTIMATION FOR PATTERN CUTTING. A technical overview of fabrics. A categorisation for designers and pattern cutters. A categorised range of fabrics. PART TWO: FABRIC AND FORM. Fabrics and garment forms. Enveloping the body shape. Fitting the body shape: woven fabrics. PART THREE: FABRIC,…
In this letter, the authors report on the giant dielectric constant properties in a hitherto unexplored material, the superionic conductor lead tin fluoride PbSnF4. Despite its superionic behavior, PbSnF4 is surprisingly found to exhibit extraordinary high dielectric constant (ε′∼105). ε′ is almost independent of temp…
We present the results of ab initio calculations on magnetic and electronic structures of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ at low doping, $x=1∕8$. Using the B3LYP hybrid exchange-correlation functional within the framework of density-functional theory, we predict a ferroma…
A rigorous mathematical foundation and a procedure for quantifying three-dimensional exfoliation and dispersion of clay particles in polymer-clay nanocomposites from their two-dimensional transmission electron microscopy micrographs have been developed. Two independent parameters, exfoliation number and interparticle…
Co 2 Mn 1 − x Fe x Si Heusler alloys crystallize in the L21 structure. This structure type requires random distribution of Mn and Fe in case of the mixed alloys. The spin echo nuclear magnetic resonance (NMR) technique probes the direct local environments of the active atoms and is thus able to resolve next neighborin…
Using Kelvin force microscopy, the authors have investigated the potential distribution on ferroelectric films. The local distribution of potential was observed on downward, prepoled areas. The polarity of the potential corresponds to the screen charge. It was found that the electrical properties of the grain boundary…
peer reviewed
The connection of twelve peripheral and divergent dodecyloxy chains to a central tridentate aromatic binding unit provides the dodecacatenar ligand L11, for which room-temperature mesomorphism is detected. An enthalpically unbalanced large melting entropy (DeltaSmL11=226 J mol(-1) K(-1)) results from the programmed mi…
Ba Ti 0.9 ( Ni 1 ∕ 2 W 1 ∕ 2 ) 0.1 O 3 ceramics were fabricated and their dielectric properties were investigated. With the sintering temperature increasing from 1250to1280°C, the grain size abruptly increases from 1–2to20–40μm, accompanying significant changes in dielectric response. The samples with larger grains ex…
In this work were studied the plasticizing – antiplasticizing effects of glycerol and sorbitol on moisture sorption and mechanical properties of cassava starch films. Films were produced by casting with cassava starch (3g starch/100 g filmogenic solution) and different concentrations of glycerol or sorbitol (0, 5, 10,…
Size-dependent χ(3) of water-soluble thiol-capped CdTe quantum dots (QDs) in nonresonant region has been examined by Z-scan and degenerate four-wave mixing experiments. Two-photon absorption cross section as high as 104GM was observed for 4.9nm sized CdTe QDs. Both imaginary and real parts of χ(3) were found to increa…
Abstract Poly(3‐hydroxybutyrate) (PHB) has been shown to be efficiently nucleated by exfoliated graphite nanoplatelets (xGnP). The nucleating effect of xGnP was investigated using differential scanning calorimetry, optical microscopy and atomic force microscopy. Nonisothermal crystallization of PHB from the melt requi…
Abstract In this study, styrene‐ b ‐ethylene/butylene‐ b ‐styrene triblock copolymer (SEBS) and maleic anhydride grafted SEBS (SEBS‐ g ‐MA) were used as compatibilizers for the blends of polyphenylene sulfide/nylon 66 (PPS/PA66). The mechanical properties, including impact and tensile properties and morphology of the…
Abstract The ammoniate [K 17 (Sb 8 ) 2 (NH 2 )] · 17.5NH 3 was synthesized by reduction of antimony with potassium in liquid ammonia. Single crystals were isolated and characterized by low temperature X‐ray structure analysis. [K 17 (Sb 8 ) 2 (NH 2 )] · 17.5NH 3 crystallizes in the space group P 2 1 / c (No. 14) with…
Abstract The natural fibers (banana, hemp, and sisal) and high density polyethylene were taken for the preparation of natural fiber/polymer composites in different ratios of 40 : 60 and 45 : 55 (w/w). These fibers were esterified with maleic anhydride (MA) and the effect of esterification of MA was studied on swelling…
Photoluminescence from the dicarbon G center in nanopatterned silicon is investigated. Enrichment of silicon with carbon atoms has been achieved by solid-phase epitaxy. When this carbon enrichment is combined with nanopatterning, The authors found a 33-fold increase in the G line emission intensity to a level that is…
Abstract Synthesis of Y 2 O 2 (CN 2 ) and Luminescence Properties of Y 2 O 2 (CN 2 ):Eu Crystalline powders of the new compound Y 2 O 2 (CN 2 ) were prepared by solid state reactions from different mixtures of YCl 3 /YOCl/Y 2 O 3 and Li 2 (CN 2 ) at temperatures between 620 °C and 650 °C. Structure refinements based o…
Abstract Nanocomposites based on low molar mass isotactic polypropylene (iPP) and a low concentrations (1–2 wt %) of multiwalled carbon nanotubes (MWCNTs) were studied using thermal analysis, optical and electronic microscopy, and X‐ray diffraction/scattering techniques. It was first determined that MWCNT decrease ind…
Abstract Porous silicon (p‐Si) has been investigated as a novel delivery system for protein therapeutics. The loading of a model hydrophilic protein, Papain into anodised and stain etched p‐Si powders has been investigated using X‐ray photoelectron spectroscopy (XPS) and infrared spectroscopy (FTIR) and correlations m…