Materials Literature
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The synthesis, solution stability and 64Cu2+ labeling of magnetite nanoparticles (NPs) coated with different macrocycles is reported, together with the stability of the resulting radioisotope-labeled NPs to transchelation by the competing ligand cyclam, and their stability in blood serum. Three macrocycles, 1,4-bis(2-…
K(0.46)Na(0.54)NbO(3) ceramics have been fabricated via a chemical synthesis route. It was found that 500 °C heat treatment is sufficient to crystallize the niobate powder and the ceramic sintered at 1080 °C in air shows good ferroelectric and piezoelectric properties (P(r) ~ 15 μC cm(-2), d(33) ~ 120 pC N(-1)). Elect…
Application of a shear thickening fluid (STF) treatment to neat Kevlar has been reported to improve fabric ballistic performance, for impacts of 0.22 caliber fragment simulating projectiles at velocities near 800 feet per second. In recent research, the authors have evaluated the ballistic performance of STF Kevlar in…
Ferrospinel catalyst samples containing Nickel, Cobalt and Copper have been synthesized by room temperature co-precipitation route and have been found to be effective for the oxidative removal of carbon monoxide from automobile exhaust gases even at relatively lower temperatures (cold-start). These catalyst materials…
The impedance and dielectric relaxation spectra of undoped and CaSiO3-doped CaCu3Ti4O12 (CCTO) have been reassessed by rigorous theoretical fittings and simulations; and the related physical elements are substantially identified. The extended Maxwell–Wagner (MW) two-layer condenser model has been proposed, which clari…
The contribution deals with the influence of selected knitting parameters and the relaxation period on the structure and mechanical properties of plain jersey weft knitted fabrics made of cotton and elastane yarns. There are considerable differences in the behaviour of conventional knitted fabrics and fabrics with ela…
Mesoporous carbon/conducting polymer composites have been synthesized by adsorption of different monomers (aniline, pyrrole, thiophene and 3-methyltiophene) in the gas phase onto the carbon surface, followed by oxidative chemical polymerization. The materials were tested as electrode material for electrochemical capac…
Silver nanowires were used as templates to synthesize silver-doped CeO(2) (Ag-CeO(2)) nanotubes by the precipitation method. The precipitated solid was dried at 100 °C for 24 h and calcined at 500 °C for 5 h. A TEM, HRTEM, LV-SEM and XRD study was carried out to determine the micro and nanostructural characteristics o…
A family of novel amphiphilic gadolinium chelates was successfully obtained by coupling the hydrophilic DOTA ligand [1,4,7,10-tetrakis(carboxymethyl)-1,4,7,10-tetraazacyclododecane] to squalenoyl moieties. Thanks to the self-assembling properties of their squalenoyl lipophilic moieties, all these derivatives were able…
Transmittance measurements on various single crystal ferroelectric and dielectric materials, BaTiO(3), SrTiO(3), LiNbO(3), LiTaO(3), (PbMg(1/3)Nb(2/3)O(3))0.73-(PbTiO(3))0.27, LaAlO(3), and Bi(4)Ge(3)O(12), over a broad millimeter-wave (MMW) frequency range have been performed. Frequency dependence of the complex diel…
An innovative constitutive model for the rheological behavior of the polymer/carbon nanotubes composites is proposed in this paper. Based on experimental investigations, this consistent law gives the evolution of the composite shear viscosity versus the shear rate, over a large range, and the temperature with various…
N-Octyl-D-gluconamide (C8-DGlu) is known to form hydrogels; however, as is the case with many low molecular weight gelators, C8-DGlu crystallizes from the gel state within a few hours. Thus, in order for such gelators to find uses, e.g. as viscosity modifiers, potential methods to increase their lifetime stability by…
VO2(B) nanobelts have been successfully synthesized via a simple hydrothermal route. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Raman spectrum. These nanobelts are of rectangular cross-section with mean length about 1 μm, mean width about 80 nm…
Here, we utilize a computational bottom-up approach to decipher the size effects of poly(alanine) crystalline subunits as they occur in most spider silks on silk fiber mechanics. We vary the crystal size in terms of their cross-sectional area, i.e. the number of layers of β-strands, S, in the crystal and the backbone…
Oil-in-water and water-in-oil capsules, and flat membranes of tuneable thickness and composition were prepared in one single facile step, based on the interfacial complexation between chitosan and anionic phosphatidic fatty acids. The phosphatidic acid molecules were introduced via the oil phase. The thickness of the…
BACKGROUND: Candidal meningitis is a common clinical manifestation of invasive candidiasis in neonates. The aim of this study was to evaluate the in vivo antifungal efficacy of CG(3)R(6)TAT nanoparticles, novel core-shell structures self-assembled from cationic antimicrobial peptides, in a rabbit model of candidal men…
Y(2)O(3) nanoparticles with strong red luminescence (quantum yield about 25%) was synthesized via simple hydroxylation of yttrium nitrate using hexamethylenetetramine as an additive; the red luminescence is emitted from oxygen-related defects of pure Y(2)O(3) nanoparticles, and is tunable by altering the additive.
Oxidative polymerization of aniline in aqueous solution in the presence of trehalose was conducted. Fourier transform infrared spectroscopy confirmed successful preparation of polyaniline containing a trace amount of trehalose. Electron spin resonance spectroscopy revealed that electron spin concentration of the polya…
In this article, the buckling analysis of a double-walled carbon nanotube (DWCNT) subjected to a uniform internal pressure in a thermal field is investigated. The effects of the temperature change, the surrounding elastic medium based on the Winkler model, and the van der Waals forces between the inner and the outer t…
Trinuclear rare-earth metal complexes [M₃(taciH₋₃)₂](3+) (M = La(3+), Y(3+)), based on a rigid polyamino-polyalcohol ligand 1,3,5-triamino-1,3,5-trideoxy-cis-inositol (taci), are proven to be efficient catalysts for the hydrolysis of 2-hydroxypropyl-4-nitrophenyl phophate (HPNP), a commonly used RNA model system.