Materials Literature
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We present a numerical study of resonant negative refractive index (NRI) metamaterials in which their effective parameters are calculated. For a periodic media consisting of split-ring resonators and metallic wires the effective refractive index is compared by means of two different methods. The first one is an invers…
This study focuses on the structure and magnetic properties of Y-type hexagonal ferrite, especially the tunable permeability controlled by the direct current (dc) magnetic field. The composition of Ba2Zn1.2−xCoxCu0.8Fe12O22 (x varied from 0 to 1.2) is selected, where the changes in the amount of Zn and Co is to tailor…
SANS has not been successfully applied to study the structure of semicrystalline polyolefins without deuterated polymers because of the fundamental limitation of negligible contrast between the crystalline and amorphous phases in spite of the mass density difference. The proposed in situ vapor sorption SANS technique…
We investigate theoretically the angular distributions and the rainbows of 1 GeV protons channeled in the ropes of (10, 0) single-wall carbon nanotubes. The rope length is varied between 0.53 and 5.29 µm. The angular distributions of channeled protons are generated using the numerical solution of the proton equations…
A Fourier method to connect segmented intensity data measured with a multiple-detector system (MDS) for powder diffractometry has been developed. Differences in sensitivity, slight shifts in peak positions and asymmetric instrumental broadening for different detectors are simultaneously adjusted by a Fourier-based dec…
Magnetic nanoparticles are materials of great interest because of the remarkable fundamental properties exhibited by these materials as well as their technological potential in the area of biomedicine and other areas. The technologically useful properties of magnetic nanomaterials are not limited to their structural,…
We study the effects of annealing on the electrical resistivity of thin metallic multilayers of nickel and aluminum. Resistivity is seen to rise with anneal temperature. Above a specific temperature the resistivity decreases. We model this behavior based on the interface evolution due to the formation of intermetallic…
This paper reviews two publications of the authors. The first relates to the classification of manufacturing porosity of a ceramic matrix composite material DRL-XT and the second to the quantification of thermal property degradation, due to porosity, at the level of the fibre tow and matrix regions. The paper then sho…
Abstract The living cationic polymerization of 4‐[2‐(vinyloxy)ethoxy]azobenzene (AzoVE) was achieved with various Lewis acids in the presence of an ester as an added base. When Et 1.5 AlCl 1.5 was used as a catalyst, the living polymerization system was controllable by UV irradiation as a result of cis and trans isome…
The crystal structure of homoisocitrate dehydrogenase involved in lysine biosynthesis from Thermus thermophilus (TtHICDH) was determined at 1.85-A resolution. Arg85, which was shown to be a determinant for substrate specificity in our previous study, is positioned close to the putative substrate binding site and inter…
The present paper illustrates synthesis of Y2O3 based partially stabilised zirconia by evaporative decomposition of solution (EDS) and α-alumina by wet chemical precipitation for making zirconia toughened alumina (ZTA) ceramics by a powder metallurgy process route. The ZTA sintered product has been characterised for u…
In this paper we present an experimental and theoretical study of the thermoreflectance response as a function of the probe wavelength for layered microelectronics structures. The investigated sample consists of a polycrystalline silicon conducting track grown on a SiO2-coated Si substrate. Thermoreflectance measureme…
The nanostructure and textural properties of acid-activated bentonite clays from the Bogovina coalmine were investigated. The acid activation was performed with HCl in the concentration range 1.5-7.5 M. The atomic force microscopy followed by image analysis was used in order to establish the influence of the acid trea…
Thermoelectric transport properties of CoSi1−xAlx single crystals have been measured over the temperature range from 300to973K to investigate the effects of Al substitution on the electrical resistivity, Seebeck coefficient, and thermal conductivity. The solubility limit of Al substitution for Si in CoSi is found to b…
Defect textures in concentrated fiber-filled polygonal networks in nematic liquid crystals are analyzed using differential geometry and computational modeling based on Landau--de Gennes theory. Micron fibers exhibit singular cores of strength -1/2 for odd polygons and escaped cores of strength -(N-2)/2 for even polygo…
Abstract The impact behaviors of nanoclay filled nylon 6 (nano‐nylon 6) or nylon 6 blended with poly(acrylonitrile‐butadiene‐styrene) terpolymers (ABS) were investigated here using polybutadiene grafted maleic anhydride (PB‐ g ‐MA) as a compatibilizer to enhance interphase interaction. It is found that impact strength…
We present the optical conductivity and Raman spectra of θ-(BEDT-TTF) 2 CsZn(SCN) 4 . The vibrational and vibronic bands in the 1200–1600 cm -1 region was assigned with the aid of the 13 C-substituted compound. The nearly uniform charge distribution was found in a whole temperature range from 300 to 6 K. However, the…
An in situ cell designed for synchrotron X-ray diffraction during electrochemical cycling of battery materials is presented. The cell operates in transmission mode and can be oscillated with the dedicated sample holder to improve powder statistics. It allows fast data acquisition, provides hermetic sealing and high-qu…
When methyl 4,6-O-(p-nitrobenzylidene)-alpha-D-glucopyranoside (p-NO(2)Glu) was dissolved in water, p-NO(2)Glu molecules self-assembled to form a fiber (elemental fiber), and as a result, the solution became a partially transparent gel. When an equal (or more) amount of DNA was added to the gel, a white and crystallin…
The reaction of [Mn(CH2tBu)2(tmeda)] (1) and a silica partially dehydroxylated at 700 degrees C (SiO(2/700)) yields a single surface species [([triple bond]SiO)Mn(CH2tBu)(tmeda)] (2a; tmeda = tetramethylethylendiamine), while a mixture of 2a and [([triple bond]SiO)2Mn(tmeda)] (2b) is obtained by using SiO(2/200), SiO(…