Materials Literature
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Nano refers to a nanometer (nm), i.e. one nanometer is a millionth of a millimeter or about one eighty thousandth the width of a human hair.At this dimension, materials exhibit novel properties that differ from both the isolated atom and bulk material, and largely depend on size of the particles [1].It is interdiscipl…
ABSTRACT Viscoelastic properties in solid and in melt state of poly( ε ‐caprolactone), PCL, nanocomposites with organomodified clays (Cloisite30B and Cloisite15A) are thoroughly investigated. Although WAXD is insensitive to the difference in the nanocomposites structure, the melt rheology reveals pronounced difference…
The nanomechanical properties of solvent-cast polymer thin films have been investigated using PeakForce™ Quantitative Nanomechanical Mapping. The samples consisted of films of polystyrene (PS) and poly(methyl methacrylate) (PMMA) obtained after the dewetting of toluene solution on a polymeric brush layer. Additionally…
An oil recovery system composed of an oil capture module packed kapok fibers and a vacuum pump was developed for continuous oil recovery from artificial oil/water (O/W) mixture. The mechanism of porous hydrophobic–oleophilic kapok fiber layer (KFL) for O/W separation was analyzed, and a physical model for continuous o…
New fluorinated bent‐core mesogens containing the 1,2,4‐oxadiazole or 1,2,4‐triazole nucleus have been synthesized taking advantage of the ANRORC ( A ddition of N ucleophile, R ing‐ O pening, R ing‐ C losure) reactivity of 5‐perfluoroalkyl‐1,2,4‐oxadiazoles. Physical state changes of the obtained compounds were charac…
Nanocrystals with orange‐reddish luminescence based on the pyrochlore‐type complete solid solutions with cube‐like morphology in the Eu 2 Sn 2 O 7 –Gd 2 Sn 2 O 7 system were directly formed from the precursor solutions of SnCl 4 , GdCl 3 , and EuCl 3 under weakly basic hydrothermal conditions at temperatures higher th…
Multipoint-to-multipoint and multipoint-to-plane electrode geometries have been investigated to enhance corona discharge modes in atmospheric pressure weakly ionized plasma. This paper presents a new geometry approach by a protrusion array over the grounded screen along with a high-voltage (HV) needle array to obtain…
The reduction of six mixed-oxide samples containing 14, 24, 35, 46, 54, and 62 mol % Pu was studied in situ by X-ray diffraction. The samples were first oxidized in air and subsequently reduced in a controlled atmosphere corresponding to a stoichiometric composition with an O/M = 2.00. After oxidation, we observed two…
In this work, we studied the removal of simazine from both a model and well water by adsorption on two different adsorbents: zeolite H-Y and a porous silica made in the laboratory by using the sol-gel technique. The pH dependence of the adsorption process and the isotherms and pseudo-isotherms of adsorption were studi…
Four new actinide chalcogenides—namely, Ba2Cu4USe6, Ba2Cu2ThSe5, Ba2Cu2USe5, and Sr2Cu2US5—were synthesized via solid-state methods at 1173 K. Single-crystal X-ray diffraction studies show that Ba2Cu4USe6 crystallizes in a new structure type in space group C2h5–P21/c of the monoclinic system, whereas the three other c…
In this paper, we show a fabrication method and the dielectric properties of strontium titanium oxynitride (SrTiO 3 :N) single crystals. Oxynitride single crystals were prepared by annealing SrTiO 3 single crystals in gaseous ammonia. SrTiO 3 :N was assumed to have the chemical composition SrTiO 3−3 x N 2 x , which co…
La-Co substituted barium hexaferrites with the chemical formula of Ba1−xLaxFe12−xCoxO19 (x = 0.0, 0.1, 0.3, and 0.5), prepared by a conventional ceramic method, were systematically investigated by Raman spectra, X-ray photoelectron spectroscopy, Rietveld refinement of X-ray diffraction patterns, and vibrating sample m…
In this paper, we attempted to prepare microfoam by using a sandpack filled with glass beads with co-flowing gas and foaming solution, the microfoam stability and effectiveness in improving profile control capacity at micromodel and pore media were evaluated by micromodel tests and double-core experiments. The results…
Optically active crystalline polymers have shear piezoelectricity owing to their asymmetric crystal structure. In this study, to explore a novel shear piezoelectric polymer, we have focused on an imide ring structure and synthesized optically active polysuccinimides (PSIs), the minimum structure of optically active po…
BACKGROUND/PURPOSE: Currently, silver nanoparticles (AgNPs) have gained importance in various industrial applications. However, their impact upon release into the environment on microorganisms remains unclear. The aim of this study was to analyze the effect of polyvinylpyrrolidone-capped AgNPs synthesized in this labo…
The emerging global need for energy generation, conservation, and utilization has intensified interest in more efficient, costeffective and pollution-free means of power generation. Thermoelectric materials can generate electrical energy from waste heat and can play an important role in a global alternative energy sol…
The development of a biomimetic surface able to promote endothelialization is fundamental in the search for blood vessel substitutes that prevent the formation of thrombi or hyperplasia. This study aims at investigating the effect of functionalization of poly-ε-caprolactone or poly(L-lactic acid-co-ɛ-caprolactone) ele…
Fluorescent carbon nanoparticles (CPs), a fascinating class of recently discovered nanocarbons, have been widely known as some of the most promising sensing probes in biological or chemical analysis. In this study, we demonstrate a green synthetic methodology for generating water-soluble CPs with a quantum yield of ap…
The substrate temperature required for synthesis of graphene in an arc discharge plasma was studied. It was shown that an increase of copper substrate temperature up to the melting point leads to an increase in the amount of graphene production and the quality of graphene sheets. Favorable range of substrate temperatu…
High-pressure die-casting (HPDC) AZ91 tensile specimens were used to investigate characteristics of gas pores and their effects on mechanical properties of HPDC AZ91 magnesium (Mg) alloy. Combining the stereoscopic morphology of gas pores obtained from a three-dimensional (3D) reconstruction technique with the experim…