Materials Literature
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International recommendations for changes to the SI brochure regarding the definition and use of the quantity dose equivalent are presented. The second part of this note is a simple explanation of the difference between a radiation quantity and its unit.
Abstract Spider dragline silk is an extremely strong biopolymer and has unique combination of desirable mechanical properties. In the present paper dragline of Golden Nephila spider was studied for dimensional, structural, physical and tensile properties. The test results established significant variability in diamete…
Abstract Clay minerals occur as replacements of olivine, pyroxenes, plagioclase and interstitial materials, and as vesicle fillings, in altered basalts from the Middle Atlas (Morocco). Phyllosilicates are the main components of this alteration process. They have been characterized here by optical microscopy, X-ray dif…
Polyamidoamine dendrimers have been synthesised from ethylenediamine and methyl acrylate and their effectiveness in decolorising wastewater containing Acid Fuchsin and Methyl Blue demonstrated. The effect of variables, such as initial pH, quantity and generation of dendrimer, has been investigated. The experimental re…
High quality undoped and Ga2O3 doped ZnO nanoribbons are grown by chemical vapor transport and condensation. The effect of the dopant on the structural and optical properties is investigated. The hexagonal wurtzite structure is ascertained with X-ray diffraction and Raman spectroscopy. Photoluminescence on doped ZnO r…
Two new homologous series of seven‐ring bent‐core compounds derived from 5‐chlororesorcinol have been synthesized. Many of the lower homologues in both series exhibit the rectangular columnar B1 phase. However, the three analogous compounds having long terminal alkyl chains exhibit a switchable lamellar phase, which i…
Abstract The ligand H 5 dotasa (=( αRS )‐ α ‐(carboxymethyl)‐1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetraacetic acid) is a H 4 dota‐like macrocyclic ligand with a carboxymethyl CH 2 COOH substituent at the C( α ) atom of one of the four acetate pendant arms of H 4 dota (=1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetraa…
High third-order nonlinear optical susceptibility (χ(3)(ω; ω, −ω, ω) = −4,2 × 10−16(m2/V2)). In the visible spectral range may be achieved in PVA composites containing narrow bad gap PbS semiconductor nanocrystals with a strong limitation of the area of charge carrier delocalization.
A series of experiments on fuel/coolant interaction (FCI) was performed in the TROI facility, where the composition of the mixture was varied. The compositions of the UO2 and ZrO2 mixture in weight percent were 50:50, 70:30, 80:20, and pure ZrO2. The responses of the system including the temperature of the pool of wat…
Substituted iron and cobalt phthalocyanines are easily prepared by microwave irradiation of the starting materials under solvent free condition, which reduced reaction time considerably. The synthesized metallophthalocyanines (octachloro-, tetranitro-, tetracarboxy- or polyphthalocyanine) are used as epoxidation catal…
Low voltage cathodoluminescence (LVCL) and photoluminescence measurement were carried out to better understand the role of Gd in (Y,Gd)VO4:Eu phosphor and to compare two different synthesis methods (solid-state reaction, coprecipitation reaction) and their preparing conditions. From the analysis of LVCL measurement, i…
This article reviews recent findings on the formation of ordered colloidal structures from bulk demixing in liquid crystalline materials. In contrast to classical phase separations, which lead to randomly distributed macrodomains of various sizes, demixing in liquid crystals leads to remarkably uniform droplets that f…
Fabric response to hydroentangling process variables is usually presented as a plot of energy consumed / kg of fabric produced. This paper presents a simple mechanical model describing the transformation of a random fiber web into a hydroentangled fabric having a clearly defined cellular structure dependent on the for…
A finite element model of an ATR42-300 commuter-class aircraft was developed and a crash simulation was executed. Analytical predictions were correlated with data obtained from a 30 ft/s (9.14 m/s) vertical drop test of the aircraft. The purpose of the test was to evaluate the structural response of the aircraft when…
Abstract The time‐dependent irreversible deformation of a thin metal film constrained by a substrate is investigated by a mesoscopic discrete dislocation simulation scheme incorporating information from atomistic studies of dislocation nucleation mechanisms. The simulations take into account dislocation climb along th…
This article employs the method of electrochemical impedance spectroscopy (EIS) to extend the physics-based, nonlinear equivalent circuit models of supercapacitors (SCs) to describe lithium-ion batteries (Li-ion). The following section briefly introduces the method of electrochemical impedance spectroscopy and present…
A new metal-assisted chemical etching method using Na2S2O8 as an oxidant is proposed to form a porous layer on a multicrystalline silicon (mc-Si). This method does not need an external bias and enables formation of uniform porous silicon layers, more rapidly than the conventional stain etching method. A thin layer of…
Nanocomposite alloys of fct γ1-Fe(Co)Pt, fcc γ-Fe(Co)Pt, and Fe(Co)2B phases with good permanent magnet properties have been formed by melt spinning followed by annealing. An amorphous phase was formed for Fe56.25−xCoxPt18.75B25 (x=0–20) alloys by melt spinning. The thermal stability of the amorphous alloys increases…
We have examined the efficiency of various techniques for the determination of the nonlinear optical response (NLO) of dye-doped liquid crystals. The intensity ranges where each technique is optimal are defined. We propose an approach for precise and detailed NLO response measurements as a function of dye concentratio…
To evidentiate the role of the nature of sulfonate ancillary ligands on the value of the quadratic hyperpolarizability of Zn(II) complexes with stilbazole-like ligands, the second-order nonlinear optical (NLO) properties of [ZnY(2)(4,4'-trans-NC5H4CH=CHC6H4NMe2)2] complexes (Y = CF3SO3, CH3SO3, or p-CH3C6H4SO3) are in…