Materials Literature
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Magnetoelectric coupling at room temperature in Pb1−xBax(Fe0.5Ti0.5)O3 (x=0.2 and 0.4) ceramics prepared by conventional solid state reaction method was observed. The Ba substitution for Pb reduces the lattice distortion, i.e., c∕a ratio, and hence the ferroelectric transition temperature reduces on increasing Ba cont…
Recently the authors have observed in compounds of the 4,n-alkyloxybenzoic acid series, with the homologous index n ranging from 6 to 9, a texture transition in the nematic range which subdivides the nematic phase in two sub-phases displaying different textures in polarised light analysis. To investigate a persistence…
Morphological variations of copper nanoparticles synthesized by the reduction of copper acetate with sodium borohydride in the presence of poly(N-vinyl-2-pyrrolidone) (PVP) have been investigated. The results indicate that the specific rod shape secondary aggregation of copper nanoparticles are formed in the case that…
Regarding the dielectric characteristics of the diffusion phase transition (DPT) in ferroelectric relaxor materials, several researchers have provided similar but different laws to explain these phenomenon. These laws, presented by Burfoot et al. and Eiras et al., have been proven to provide a better explanation, espe…
Carbon nanotubes possess unique chemical, physical, optical, and magnetic properties, which make them suitable for many uses in industrial products and in the field of nanotechnology, including nanomedicine. We describe fluorescent nanocomposites for use in biosensors or nanoelectronics. Then we describe recent result…
The behaviour of a preheated tungsten target under repetitive pulsed plasma impacts of the energy density 0.75 MJ m −2 with the pulse duration of 0.25 ms was studied with the quasi-stationary plasma accelerator (QSPA) Kh-50. Two identical samples of pure sintered tungsten have been exposed to numbers of pulses exceedi…
Crystalline silver nanowires 60-100 nm in diameter and tens of micrometres in length have been fabricated using a low temperature, solution synthesis technique. We explore the potential of this method to produce functional nanowire structures using two different strategies to attach active molecules to the nanowires:…
Abstract We have synthesized and studied the excitation‐emission properties of three erbium‐coordinating porphyrin‐based complexes for solid state films with emission in the 1530‐nm band. In two of these complexes the C‐H groups of the organic part (ligand) have been substituted with C‐F and/or C‐Br ones in order to a…
Bulk hydrogen retention and the analysis of absorption kinetics have been studied on graphite irradiated with neutrons at various conditions. Two kinds of hydrogen trapping sites may exist and be additionally produced during irradiation: interstitial cluster loop edge sites (trap 1) and carbon dangling bonds at edge s…
Abstract Solid-state NMR methods were used to characterize the filler distribution in rubber blends and domain size of thermoplastic vulcanizates (TPV). Correlation between filler content and magic angle spinning (MAS) 13 C and 1 H NMR signal linewidth was established, and filler content in each component of the rubbe…
Recent developments in direct injection foam processing using styrene–maleic anhydride (SMA) copolymer have resulted in a distinct and significant increase in the performance of foam packaging for food service applications. There are several problems that a consumer could experience when using a traditional polystyren…
Electron paramagnetic resonance spectroscopy is used to determine the concentration of excited (singlet) molecular oxygen photosensitized by silicon nanocrystals. The generation of singlet oxygen in the porous silicon layers is studied quantitatively at various oxygen pressures and exciting light intensities with the…
Abstract The multiaxial impact test in polymers is analyzed. The impact response of a propylene copolymer is characterized under different test conditions. Due to the nature of the impact event and to the complex material behavior, an intricate stress state is developed rendering rather difficult the assessment of the…
Abstract Surface morphology of monolayers related to solid‐state structure for methacrylate comb copolymers having fluorocarbon and hydrocarbon side‐chains was investigated by X‐ray diffraction (XRD), differential scanning calorimetry, and atomic force microscopy (AFM). From the XRD profiles, two kinds of short spacin…
Corrosion tests for copper were carried out in solutions containing various concentrations of chloride or sulfate ions under both static and flowing conditions. Pitting corrosion occurred at lower ion concentrations and was then transformed to general corrosion with increasing ion concentration. The critical ion conce…
We have observed one-dimensional (1D) superlattices at the grain boundary of highly ordered pyrolytic graphite (HOPG) with a scanning tunneling microscopy (STM). Observed 1D superlattices extend over micrometer length and have periodicities from 0.5 nm to 10 nm with a height corrugation up to 1.5 nm, due to electron d…
This article describes the coupled heat and mass (water, oil) transport phenomena in parallelepiped samples of beech (Fagus sylvatica) fried in peanut oil between 120 and 180°C. The aim was to evaluate the suitability of simultaneous fry drying and oil impregnation as an alternative wood treatment process. Water loss…
Plasma facing components (PFC) for modern steady state fusion devices have to withstand heat fluxes up to 20 MW m −2 . In case of internal defects in the components, a critical heat flux event can occur at an incident heat flux lower than expected in a defect-free component. It is therefore essential to develop in-ves…
The need to deliver ultra-low emitting vehicles at a reasonable cost is driving the automotive industry to invest significant manpower in computer aided design and optimization of exhaust treatment systems. The significant fluctuations in the stock exchange market values of the precious metals employed in the manufact…
The effect of hydrostatic pressure on chemical reactions induced by 20 kHz ultrasound has been studied using three different methods: the oxidation of potassium iodide, bubble cloud visualization studies, and sound attenuation measurements. The latter two have demonstrated that shielding of the ultrasonic wave is less…