Materials Literature
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In the present study the single crystal growth of the pure and doped organic nonlinear optical crystal, L-arginine phosphate is reported. The dopants used were urea and thiourea. The crystals were grown by slow evaporation technique. The presence of various functional groups in the grown crystal was confirmed by Fouri…
Abstr act. The investigation of fullerenes and especially of carbon nanotubes (CNTs) has opened a new window for the development of polymer matrix composites with novel properties and applications. CNTs, which have a number of unexpected properties, both mechanical and electrical, seem to have a large potential as a f…
The reaction of N,N′-bis(2-hydroxybenzyl)-N,N′-bis(2-pyridylmethyl)-R-1,2-propanediamine (R-bbppnH2) with Ln(NO3)3 · nH2O (Ln = Tb, Dy, Ho, Er, Tm, Yb, or Lu) stereoselectively gave an optically active complex, [Ln(R-bbppn)(NO3)]. All the complexes crystallize in the same acentric orthorhombic space group of C2221 . T…
Abstract Peptide polymer nanotubes (PPNTs) were prepared by in situ surface‐initiated atom transfer radical polymerization (ATRP) from self‐assembled cyclic peptide nanotubes. PPNT dimensions, i.e. , height ( i.e. diameter) and length, as derived from AFM measurements of surface‐adsorbed, dry PPNT are a function of th…
The enhanced high‐temperature creep resistance in alumina/single‐wall carbon nanotubes (SWNTs) composites has been attributed to the unprecedented grain‐boundary structure of these composites, where the SWNTs bundles segregated at the alumina grain boundaries partially impede grain‐boundary sliding. In this study, the…
Abstract In this work we extend classical molecular dynamics by coupling it with an electron transport model known as the two temperature model. This energy balance between free electrons and phonons was first proposed in 1956 by Kaganov et al . but has recently been utilized as a framework for coupling molecular dyna…
Im Doppel besser: Nanopartikelcluster (wie Dimere, Trimere usw.) sind begehrte Systeme für Anwendungen in der oberflächenverstärkten Raman-Spektroskopie. Eine jüngste Studie bietet einen eleganten Ansatz für die Herstellung von Dimeren von Silber-Nanokugeln aus Nanowürfeln durch kontrolliertes chemisches Ätzen. Die Na…
Abstract Minor amounts of poly(ethylene‐ co ‐methacrylic acid) ionomer neutralized with Zn (PEMA‐Zn) were added in the melt state to blends of polypropylene (PP) with up to 40% of poly(amino ether) (PAE) resin. Given the good barrier characteristics of PAE, it is a good candidate to improve the poor barrier properties…
Rare‐earth oxides are doped into ZnO varistors as grain growth inhibitors for increasing the varistors' voltage gradients. However, their leakage currents become large and their nonlinear coefficients decrease at the same time. The reasonable explanation for such a phenomenon has not yet been available. In this paper,…
The oxidation behavior of reaction‐bonded porous silicon carbide (RPSC) ceramics in dry oxygen between 1100° and 1500°C was investigated based on four specimens with different porosities. RPSC ceramics exhibited a rapid mass increase in the initial stage of oxidation but a slow mass increase in the following oxidation…
Abstract Electropolishing and its mechanism for NiTi shape memory alloy in methanolic sulfuric acid have been investigated recently. In the current study, X‐ray photoelectron spectroscopy was carried out to characterize the chemical nature of the electropolished surface. The electropolished surface is covered by a thi…
Munden and earlier workers established that in plain knitted fabrics the fabric dimensional parameters namely Kc, Kw and Ks are constant at dry and wet relaxed state for wool, cotton, orlon and nylon yarns. But in the present study of cotton/lycra core spun yarn single jersey derivative knitted fabrics the values for…
Das Wachstum von Au- und Ag2S-Nanopartikeln an bestimmten Stellen von CdS-Nanostäben mit CdSe-Keimen lässt sich über die Konzentration der Au- bzw. Ag-Vorstufe steuern. Auf diese Weise sind „Janus“-Nanostabstrukturen zugänglich, in denen Au am reaktiveren Ende und Ag2S am anderen Ende zu finden ist (siehe Bild; CdSe d…
Abstract The present work derives a relationship between structure and properties of hydrogenated nitrile rubber (HNBR) in the presence as well as absence of nanofillers. Four different grades of HNBR were selected to examine the influence of polarity, unsaturation, and molecular weight on thermal, mechanical, and dyn…
Thin films of 0.5% Ca‐doped La 0.995 Ca 0.005 NbO 4−δ (LCNO) proton‐conducting electrolytes of ∼2 μm thickness were obtained by pulsed laser deposition on NiO–LaNbO 4 composite substrates. The morphology of the films was granular after annealing at T ≤1000°C and evolved to spherical‐like grains at 1100°C and above. Th…
Static and dynamic (high‐rate) indentation hardness values are determined for ZrO 2 , SiC, and Si 3 N 4 ceramics. While the static hardness is determined using a conventional Vickers tester, the dynamic hardness is determined using a custom‐designed tester that can produce a single indent within a 100‐μs duration. The…
Abstract The scope of the article was to study the perspectives of the using of wood derived fillers (WDF) from waste of different origin as fillers of polypropylene. The WDF used in this study was hard wood flour (HW), birch veneer polishing dust (VD) and tetra‐pack carton cellulose fiber (TC). Some mechanical streng…
Abstract The hexagonal‐phase NaYF4:Yb3+, Er3+ hollow nanospheres (HNS) have been successfully prepared for the first time by means of a hydrothermal route with the aid of polyethylenimine (PEI) as a surfactant. The nitrogen adsorption/desorption isotherms demonstrated the porous nature of the NaYF4 HNS. The formation…
Abstract Attempts were made to trace the effect of organoclay (OC) on the rheological and mechanical behaviors of the low density polyethylene (LDPE)/ethylene‐vinyl acetate (EVA) blends. To do this effectively, in addition to LDPE/EVA/OC system, pure LDPE and LDPE/EVA blends were also examined as model systems. The rh…
Abstract High‐temperature ferritic alloys are potential candidates as interconnect (IC) materials and spacers due to their low cost and coefficient of thermal expansion (CTE) compatibility with other components for most of the solid oxide fuel cells (SOFCs). However, creep deformation becomes relevant for a material w…