Materials Literature
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Mathematical models of dose controlled reactions based on heat flow data (1, 2) are quite common and well developed; however, such predictions for nondose controlled reactions from heat flow data are difficult, requiring extensive study of the kinetics of multiple chemical transformations as well as physical phenomena…
Carbon nanofibers (CNFs) are a new class of synthesized carbonaceous materials receiving increased attention. They have been extensively studied due to their interesting properties (i.e., purity, m...
A single splat is the building block of a thermal spray coating; thus, investigating single splats is essential to understanding thermal spray coatings and their properties. In this study, the spreading behavior and the morphology of flame sprayed ethylene methacrylic acid (EMAA) splats, deposited at various stand-off…
We report the results of magnetization and electron paramagnetic resonance (EPR) studies on nanoparticles (average diameter ∼ 30 nm) of Bi0.25Ca0.75MnO3 (BCMO) and compare them with the results on bulk BCMO. The nanoparticles were prepared using the nonaqueous sol-gel technique and characterized by XRD and TEM analysi…
We report on the crystallite growth and phase change of electrodeposited CdSe coatings on ZnO nanowires during annealing. Both in situ transmission electron microscopy (TEM) and x-ray diffraction (XRD) reveal that the nanocrystal size increases from ∼3 to ∼10 nm upon annealing at 350 °C for 1 h and then to more than 3…
The present paper shows a detailed analysis on the thermally stimulated processes in barium modified SrBi2Nb2O9 ferroelectric bi-layered perovskite, which is one of the most promising candidates for non-volatile random access memory applications because of its excellent fatigue-resistant properties. A numerical method…
Germanium dioxide (GeO2) has been used for many years in the cultivation of red and green algae as a means of controlling the growth of diatoms. Brown algae are sensitive to GeO2, however, the basis of this sensitivity has not been characterized. Here we use embryos of Fucus vesiculosus to investigate morphological an…
Even though the great interest in studying the near-infrared light emission due to Er3+ ions for telecommunication purposes, efficient visible radiation can be achieved from many different rare-earth (RE) ions. In fact, visible and/or near-infrared light emission takes place in RE-doped wide bandgap semiconductors fol…
The singular properties of hydrogenated amorphous carbon (a-C:H) thin films deposited by pulsed DC plasma enhanced chemical vapor deposition (PECVD), such as hardness and wear resistance, make it suitable as protective coating with low surface energy for self-assembly applications. In this paper, we designed fluorine-…
A poly(ether-ester-urethane) block copolymer based on poly(-caprolactone) and polyethylene glycol (PEGCL) was employed for the production of Doxorubicin loaded polymeric nanoparticles to be used as a drug delivery system. Nanoparticles were obtained by means of the nanoprecipitation/ solvent evaporation technique, pos…
We theoretically investigated magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely, [110] and [100]. We considered identical ferromagnetic layers separated by nonmagnetic layers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters…
An investigation of new PROTAC 500 armour steel was conducted. Three plates were heat treated to different states. One was quenched, the second and third were quenched and low temperature tempered at 220 and 280 C for 3 hours. A tensile test, hardness measurements, and an instrumented Charpy test were performed. Metal…
Recent experimental work suggests that individual silicon nanowires with rough surfaces possess a thermoelectric figure of merit as high as 0.6 near room temperature. This paper addresses the possibility of using an array of such nanowires in a thermoelectric junction for generation. Employing a model of frequency dep…
Multichromophoric calix[4]arenes with two or four disperse red one (DR1) moieties linked to the lower rim have been synthesized. The second-order nonlinear optical activity was measured by using the electric-field-induced second-harmonic generation technique and there was a nearly linear increase of the μβ value with…
Si nanocluster formation during rapid cooling from high temperature Si vapors and its subsequent interaction with substrate was simulated by molecular dynamics. It was confirmed that several nm sized clusters with a loosely bound structure form during rapid cooling and their metastable structures are retained even at…
We have examined the correlation between the thermal and optical properties of 30BaO-15TiO2-55GeO2 glass and its mode of preparation, i.e., the different temperatures at which the glass melts were held in a molten state (melt temperature). The changes in the absorption coefficients and the refractive indices, which in…
The phase behavior of charged disk suspensions displays a strong dependence on ionic strengths, as the interplay between excluded volume and electrostatic interactions determines the formation of glasses, gels, and liquid crystal states. The various ions in natural soil or brine, however, could present additional effe…
We model and simulate gas flow through nanopores using a single-walled carbon nanotube model. Efficient protocols for the simulation of methane molecules in nanotubes are developed and validated for both the self-diffusivity, following a pulse perturbation, and for the transport diffusivity in an imposed concentration…
Hydrogen storage properties and mechanisms of the Li 3 N– x Mg 3 N 2 ( x = 0, 0.25, 0.5, 1.0) composites were investigated in this paper. It was found that the Li 3 N–0.25Mg 3 N 2 composite exhibited optimal hydrogen storage performances as it can store reversibly ∼8.4 wt % hydrogen with an onset temperature of 125 °C…
Silver naoparticles have antibacterial properties and are used in textile, hygiene, refinement, staining, agriculture and livestock industries. The aim of this study was production of silver nanoparticles using Fusarium oxysporum and Escherichia coli. We used agar diffusion disk for inspection of antibacterial propert…