Materials Literature
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Perovskite oxide Pb(Fe1/2Nb1/2)0.52Ti0.48O3 crystals, which were grown using a modified Bridgman method, show a high low-frequency dielectric constant response at room temperature. The Curie phase transition occurs at 523 K. The characteristic frequency of the dielectric dispersion versus the inverse of temperature ob…
Abstract Both MM3 and semi‐empirical electronic structure calculations were performed for studying different conformations of PANI oligomers. The results were compared with experimental findings and analyzed to predict the relationship among individual conformations of single PANI chains, structures of packed PANI bas…
Abstract The recovery behaviors of vulcanized natural rubber from circular deformation were studied by varying sample length to investigate the influence of the degree of applied strain to the sample. The stress and strain varied uniformly across the thickness of the sample, and the degree of applied stress and strain…
Abstract The modeling of thermal decomposition process of ten natural fibers commonly used in polymer composite industry was performed by assuming a global model occurring within the entire degradation range with consideration of fiber as one pseudocomponent. Málek method with activation energy values previously obtai…
Micron-crystalline diamond (MCD) films with a unique microstructure were synthesized using a modified nucleation and growth process, in which a thin layer of ultrananocrystalline diamond (UNCD) was used as nucleation layer for growing diamond films in H2-plasma. Thus obtained (MCD)UNCD diamond films consist of nanosiz…
Abstract Filmvorstellung : Dünne Filme, die durch exponentielles Schichtenwachstum erzeugt wurden, zeigen hohe Diffusivitäten und lassen sich leicht mit anorganischen Nanopartikeln infiltrieren. Die Filme können molekulare Systeme abhängig von der Schichtzusammensetzung aus Lösungen sequestrieren und liefern oberfläch…
In this paper we investigated the most important family of proton conducting oxides, i.e., cerates, by means of neutron diffraction and of pair distribution function analysis (PDF). The paper describes the structural effects of Y-doping and water incorporation in cerates proton conductors from a viewpoint of the avera…
Abstract Four different formulations of phosphate glasses in the system P 2 O 5 –CaO–Na 2 O–Al 2 O 3 were developed. The elastic moduli have been obtained using the known method at room temperature. Their physicochemical and structural evolution was analyzed during in‐vitro degradation in SBF (simulating body fluid) a…
The synthesis and structural characterization of the λ 5 -bis(phosphine sulfide) and the bimetallic complexes bis[phosphino-M(CO) 5 ] (M = Mo, W) of the 3,4-dimethyltetrathiafulvalene ( ortho -DMTTF)-based rigid dimer (PPh) 2 ( o -DMTTF) 2, containing a central 1,4-dihydro-1,4-diphosphinine ring, are described. Single…
The objective of this study was to identify the microstructural mechanisms related to the high strength and ductile behavior of 2139-Al, and how dynamic conditions would affect the overall behavior of this alloy. Three interrelated approaches, which span a spectrum of spatial and temporal scales, were used: (i) The me…
Abstract Experimental results for the temperature dependence of the density of propyl – cyanobiphenyl (3CB), butyl – cyanobiphenyl (4CB) and hexyl – cyanobiphenyl (6CB) are presented. The results are compared with previous results for temperature dependence of other members of the alkyl cyanobiphenyl series (nCB). The…
A new fluorescent microgel containing the CP moiety (PFP-NIPAm) was prepared with the size within 100 nm. Covalent linking of the conjugated polyelectrolyte moiety into the microgel prevents leakage of the fluorophore while keeping its fluorescence property. The new fluorescent microgel can be used as an optical platf…
The ZnO thin films were prepared using a cost-effective vacuum-carbon-arc technique combined with thermal oxidation under ambient conditions from zinc nanoparticles in carbon matrix. The microstructural analysis of grazing incidence x-ray diffraction pattern using Rietveld method was investigated systematically under…
We report a synthesis route of a carbon-based structure, curved graphene sheet (CGS). The CGS grows by catalytic chemical vapor deposition autoselectively at the stacked bilayer edges of graphite support, providing an atomically smooth connection of the edges. We propose a growth mechanism based on Fe nanoparticle dif…
There is an increasing interest in the use of composites for marine/naval structures to reduce weight and maintenance cost, and to improve hydrodynamic and/or structural performance. In particular, recent works suggest that the use of a lightweight, soft core layer can significantly reduce the load transfer to the bac…
The large-scale fabrication of nanofibers of coordination polymers (CPs) is reported for the first time from CP gel precursors by the electrospinning method. In the absence of organic polymeric additives, viscous solutions suitable for drawing fibers have been made by diluting the gel precursors, which are obtained by…
The plasma-assisted molecular beam epitaxial anatase TiO2−xNx (x<0.3) films were chosen to investigate the N-derived variation in the x-ray photoelectron spectroscopy (XPS). With increasing nitrogen concentration, the small chemical shift and the shoulder of the main peak emerge in the N 1s, O 1s, or Ti 2p3/2 c…
Nanocomposites based on laponite RD and (ethylene oxide) 98 (propylene oxide) 67 (ethylene oxide) 98 (F127) triblock copolymer or poly(ethylene) glycol 2000 (PEG2000) were prepared by using the melting method. Small-angle neutron scattering and the X-ray diffraction experiments provided insights into the organization…
Reinforcement bars of microcomposite (MC) steel, composed of lath martensite and minor amounts of retained austenite, possess improved strength and corrosion characteristics over low-carbon (LC) steel rebar; however, their performance under shear loading has not previously been investigated at the microstructural leve…
Ca 12 Al 14 O 33 (Ca12Al7) phase nanophosphor material codoped with Er3+/Yb3+ ions has been synthesized through combustion route, and its UV/visible upconversion luminescence excited by infrared of 976 nm radiation has been monitored. Different batches of samples were calcinated in air at different temperatures, and t…