Materials Literature
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A precise X-ray diffraction study of a sillenite crystal with the initial composition Bi24(Si x Mn1−x )2O40 grown by the hydrothermal method showed the presence of diffraction reflections that make it possible to assign this crystal to the sp. gr. P23, in contrast to the Bi24Si2O40 crystal with the sp. gr. I23. The di…
Poly- and single-crystalline samples of the Fe(Se,Te)1 − δ system have been synthesized for short times by annealing bulk iron in chalcogen vapors and by reacting powdered iron with chalcogen melts. The lattice unit cell parameters and critical temperatures (T c) of the superconducting transition in the synthesized co…
Abstract : We investigated the physical properties and degree of crosslinking of poly (4-vinylpyridine) (P4VP) blended with transition metal salts using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The glass transition temperature (Tg) of the blends increased significantly upon addit…
This chapter discusses about the behavior of Carbon Nanotube (CNT) different structures which can be used as interconnect in Very Large Scale (VLSI) circuits in nanoscale regime. Also interconnect challenges in VLSI circuits which lead to use CNT as interconnect instead of Cu, is reviewed. CNTs are classified into thr…
The material of seashell nacre is of great interest to material scientists due to its superior mechanical properties and unique bio-compatibility. Natural seashell nacre consists of about 95% of aragonite (a mineral form of CaCO3) and a few percent of biological macromolecules; yet its work of fracture is about three…
carbon C and fluorine F atoms in F-CNTs. The investigations performed made it possible to determine the main conditions for the fluorination of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) to characterize their atomic structure and to obtain preliminary information on the specific…
YBO3:Eu3+ Nanophosphors were prepared by hydrothermal reaction (HR) with different reaction times. When the reaction times increased, the grain sizes of phosphor did not change obviously, but the particle size, morphology, and aggregation state were different. This transformation has influenced luminescent properties.…
Low-compressive new carbon-nitride-related materials were synthesized with a high-pressure and high-temperature treatment of CNHO nanoparticle prepared with an atmospheric nitrogen plasma. New phases were recovered at ambient conditions and the most prominent new phase is tentatively assigned to be an orthorhombic uni…
INTRODUCTION : The addition of nanoparticles having specific properties inside a matrix with different\nproperties creates a novel material that exhibits hybrid and even new properties. The\nnanocomposites presented in this paper combine the properties of foamed polymers\n(inexpensive, lightweight, easy to mould into…
Mössbauer spectra of octahedral Fe 3+ in NAu-1 nontronite, saturated with Na + , K + , NH4 + , Ca 2+ and La 3+ have been analysed as two quadrupole doublets. The interlayer cations were found to affect the mean isomer shift, the quadrupole splitting and the spectral area. By considering the statistically significant n…
The properties of magnetic anisotropy of GaMnAs films along the growth direction were studied by Hall effect measurements. The magnetic anisotropy fields were obtained by analyzing the angular dependence of the planar Hall resistance and the anomalous Hall resistance for in-plane and out-of plane components of the Hal…
A novel technique is suggested for synthesis of refractory metal alloys by dehydrogenation of compacted mixtures of transition metal hydrides. This technique is applicable to preparation of not only binary but also multi-component alloys, intermetallics, and alloys of III, IV, V, and VIII Group metals with various add…
We describe a setup suitable for simultaneously measuring optical and electrical properties of a liquid crystal mesophase upon temperature variation, and the difference in the order parameters between the bulk and the interface with the substrate. It integrates high-resolution polarized light optical microscopy, tempe…
Purely resonant Bragg reflections 006, 5 $$ \bar 5 $$ 0, and 666 in a rubidium dihydrophosphate (RbH2PO4) crystal at the K edge of rubidium have been experimentally and theoretically investigated. These reflections remain forbidden when the resonant dipole-dipole (E1E1) contribution to the resonant atomic factor is ta…
Silicon nitride ceramics with MgSiN2 as additives were sintered by hot pressing at 1600° ~ 1750 °C for 1-12 h under uniaxial pressure of 20 MPa. The specimens were characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy and photothermal deflection spectroscopy. After sintered…
Differential scanning calorimetry is employed to study thermal effects that are observed after plastic deformation of PP under pressures of 0.5–3.0 GPa. Thermograms demonstrate an exothermic peak at 149°C, which is related to cold crystallization, and an endothermic peak at 162°C, corresponding to melting. The enthalp…
A dry-processed planar-type cold cathode has been developed using a nanometer-sized Si dot film as an electron drift layer. Multilayered Si-nanodot films were fabricated on a n-type single-crystalline Si (c-Si) wafer by sequential dry processing (low-pressure chemical vapor deposition) and subsequent thermal oxidation…
Collagen adsorption and the morphology of its assemblies at polymer surface play an important role in improving the biocompatibility of materials. In this study, the nanoscale organization of type I collagen on Polylactide (PLA) was observed directly by high-resolution atomic force microscopy. The results show that th…
Tunable microwave devices provide added functionality, smaller form factor, lower cost, and lighter weight, and are in great demand for future communications and radar applications. Available tunable technologies include ferrites, semiconductors, microelectromechanical systems (MEMS), and ferroelectric thin films. Whi…
Swift heavy ion ( SHI )induced modifications in Makrofol-KG, a bisphenol a polycarbonate irradiated by 100 MeV Si 8+ ion beam have been studied by UV-visible and FTIR spectroscopy and dielectric constant measurements. The absorbance in UV and visible range increases with ion fluence and the absorption edge shifts towa…