Materials Literature
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We study the second-order response functions of a colloidal particle being subjected to an anharmonic potential. Contrary to typical response measurements which require an external perturbation, here we experimentally demonstrate that the system's susceptibilities up to second order can be obtained from the particle's…
Chitosan were prepared from cuticle of Lucilia cuprina maggots with two steps; deproteinization and deacetylation. It was characterized with solubility and Fourier Transform Infrared spectroscopy (FT-IR). Chitosan was ball-milled to obtain the chitosan nanoparticles which characterized with dynamic light scattering (D…
The Ti6Al4V titanium matrix composites added with (0.36 wt%, 0.72 wt%, 1.45 wt%) La and (0.17 wt%, 0.34 wt%, 0.68 wt%) B, were synthesized using common casting and hot forging technology. The microstructural characteristics and tensile properties of the heat-treated materials were investigated, with particular emphasi…
The temperature dependence of the fluorescence intensities of the thermally coupled pairs of some typical rare-earth ions was studied. The fluorescence intensity ratios (FIRs) of the thermally coupled pairs increased exponentially with increasing temperature. However, except for Er 3+ and Nd 3+ , the FIRs of other rar…
A complex analysis of the dependence of the absorption coefficient of polymer composites with nonmagnetic carbon inclusions on the real and imaginary parts of the complex permittivity, as well as on the material thickness is performed in frequency range 26–37 GHz. The composites containing 0.2 wt % of carbon fibers ha…
Two interfacial failure modes, shear sliding and buckling, of graphene on a flexible substrate subjected to uniaxial compression are investigated. The shear sliding starts at the edge region, and buckling starts at the middle region of graphene. Using shear-lag cohesive zone models and finite element (FE) simulations,…
Thermal and mechanical properties of blended radiation prevulcanized natural rubber latex (RVNRL) and low nitrosamines latex (LNL) were studied. RVNRL was blended with LNL at various composition ratios. From the tensile test, it was found that the optimum tensile value was attained at a total blending ratio of 70% RVN…
Abstract The main purpose of this study was to develop a mathematical model, in a steady state and dynamic mode, of a Catalytic Partial Oxidation (CPO x ) reformer – Solid Oxide Fuel Cell (SOFC) stack integrated system in order to assess the system performance. Mass balance equations were written for each component in…
The Co-61.8 wt% Al nanoparticles of 45 nm were prepared by hydrogen plasma-metal reaction (HPMR) method. The nanoparticles display core shell structure with Al13Co4 and CoAl core and aluminum oxide shell (about 2 nm). Under ultrasonic irradiation, nanoporous fcc-Co nanoparticles were produced successfully by chemicall…
Представлены результаты исследований по разработке аппретирующего подслоя на углеродное волокно под термопластичную матрицу (полисульфон) с целью повышения характеристик самого волокна и улучшения физико-механических свойств углепластика на его основе. Приведены свойства углепластиков на основе углеродных наполнителей…
A study of a non-uniform metamaterial array consisting of six split-ring resonators of varying diameters is conducted experimentally to measure the transmission and reflection characteristics that arise from asymmetry in the longitudinal direction. Such characteristics are examined and compared with their counterpart…
We record the two-dimensional laser-induced fluorescence (LIF) on multiple plasma constituents in a YBiO3 plasma. This allows us to directly link the influence of oxygen present in the background gas during pulsed laser deposition to the oxidation of plasma species as well as the formation of epitaxial YBiO3 films. Wi…
Pa on the free surface), with the sticking probability of 1 inherent to a hot lithium gas contained in room temperature steel walls, is carried out. An explanation of the main physical concepts to adequately place needed assumptions is included.
Found in our recent dielectric study of a planar and rigid glass-former, 1-methylindole (1MID), is an unusual secondary relaxation unrelated in its dynamic properties to the structural α-relaxation. We speculated that it originates from the in-plane motion of the molecules, and the supposedly universal Johari-Goldstei…
Abstract Classical methods for enhancing the electromagnetic field from substrates for spectroscopic applications, such as surface-enhanced Raman spectroscopy (SERS), have involved the generation of hotspots through directed self-assembly of nanoparticles or by patterning nanoscale features using expensive nanolithogr…
The charge-spin-orbital state plays a vital role in correlated oxides with mixed transition-metal elements, and it is often a matter of debate. Here, we address this issue for the newly synthesized unusual high-valence perovskite ${\mathrm{SrFe}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}{\mathrm{O}}_{3}$, using an analysis…
O and CuOH between the neighbouring Cu cations belonging to different bond networks. Besides, three structures of cuprous hydride CuH are investigated. We find that the halite structure of CuH can be stabilized at high pressure (above 32 GPa) while wurtzite is the most stable structure of CuH at ambient pressure. The…
A grapho-analytical method of optical material selection for apochromatic, athermalized objectives is described, based on diagrams of the relation between the optical and thermal characteristics of optical materials. The method presented allows for the selection of the optimal materials to achieve apochromatic correct…
Hot spots with dimensions of only a few nanometers form in numerous nanoelectronic devices. Based on recent advances in spatial resolution, these hotspots can now be studied by means of Scanning Thermal Microscopy (SThM). Here, we discuss SThM for nanoscale thermometry in comparison with other established thermometry…
Tungsten trioxide (WO3) thin films were coated onto fluorine tin oxide coated glass substrates, using electrodeposition technique via aqueous solution of peroxotungstic acid. WO3 films were evaluated as a function of annealing temperature (60°C, 100°C, 250°C and 400°C). The films were analyzed by field…