Materials Literature
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The magnetocaloric effect of an electron-doped manganite La0.9Te0.1MnO3 has been investigated. The sample of La0.9Te0.1MnO3 undergoes the paramagnetic-ferromagnetic transition at 239K. It is obtained that the effective magnetic moment (μeff=4.923μB) and the saturation moment (μS=4.08μB∕Mn) are close to the respective…
This paper describes the development of a nanoscale optical pH probe based upon the surface-enhanced Raman scattering (SERS) properties of silica-gold core-shell nanoparticles. In this approach, a thin layer of gold is deposited onto a core of silica to form a metallic nanoshell with surface plasmon modes in the red-t…
Thin films assembled on a substrate are often anisotropic. Nevertheless, because of experimental limitations, sufficient parameters to characterize the anisotropy, even in the simplest (and perhaps most common) case of uniaxial thin films, which are birefringent, are not usually available. This paper examines the cons…
In the present study, the sorption of cadmium from aqueous phase by wheat bran was investigated with and without the assistance of ultrasound. Kinetic data and sorption equilibrium isotherms were carried out in batch conditions. The influence of different operating parameters such as ultrasonic power, cadmium initial…
The silica precipitation activity of lysozyme and the possibility of controlling the resulting particle morphologies were investigated. Lysozyme can act as not only a silica precipitation agent but also as a component of the precipitation products, namely, forming a composite of lysozyme and silica. Stirring produced…
A judicious combination of materials and molecular architectures has led to enhanced properties of layer-by-layer (LbL) films, in which control at the molecular level can be achieved. In this paper we provide one such example by showing that supramolecular effects in electroactive LbL films comprising tetrasulfonated…
The aim of this work was to determine the influence of colloidal silver and gold nanoparticles on the intensity of Raman scattering observed for analytes dissolved in the water. The testing analytes were rhodamine B and rhodamine 6G. A special emphasis was placed on the choice of optimal method of preparation of collo…
We report the synthesis of silicon carbide (SiC) hollow spherical nanocrystals using a vapor−solid reaction between carbon nanoparticles and silicon monoxide vapor generated from a mixture of silicon and silica. The hollow spherical nanocrystal diameters are related to the diameters of the pristine carbon nanoparticle…
A series of n-type Cu-doped ZnO thin films was prepared by magnetron sputtering. Such films have shown ferromagnetic properties at room temperature. The Cu ion is in a univalent state as identified by x-ray photoelectron spectroscopy. The moment per Cu ion decreases as the Cu concentration increases. The largest momen…
Laser cladding experiments were done on a 5-kW continuous wave CO2 laser to synthesize TiC and TiB reinforced titanium matrix composite coatings on Ti-6Al-4V alloy with a mixture of Ti and B4C precursor powder. The thermodynamics of the reactions were calculated and analyzed. The microstructure and phase evolution of…
Studies of oxygen adsorption on a metal surface are reviewed. The relationship between oxygen adsorption and the initial stage of oxidation is considered. Current theories of low-temperature oxidation and experimental data obtained during recent decades are reviewed. Thermodynamic aspects of low-temperature oxidation…
Abstract Fine-controlled metal–organic hybridization is strongly desired for advanced nano-materials. Dendrimers are highly branched organic macromolecules with successive layers or “generations” of branch units surrounding a central core. Metal–organic hybrid versions have also been produced by trapping metal ions or…
Molten magnesium alloys oxidise rapidly during casting and handling if adequate prevention measures are not taken. New oxide films that form in a very short time during pouring seem to be one of the main reasons for dross-like defects. The characteristics of these new oxide films were observed. The magnesium alloy AZ9…
We present a spectrometer for inverse photoemission in the vacuum ultraviolet range with variable energy resolution between 400 and 165 meV full width at half maximum. The energy distribution of the electron beam used for excitation can be adjusted between 300 and 125 meV by the use of a toroidal 90 degrees electrosta…
Biomaterials are widely used in diverse applications as substances, materials or important elements of biomedical devices. Biodegradable polymers, both natural and synthetic, have been utilized in applications in which they act as temporary substitutes. Poly(alpha-hydroxy acids), especially lactic acids and glycolic a…
We apply systematic structural coarse–graining based on optimizing a potential against the structure obtained in atomistic simulations to the small organic glass former ortho-terphenyl (OTP). Atomistic radial distributions at various temperatures ranging from below the glass transition temperature to the equilibrium l…
It was found that noble metal nanoparticles including Ag, Au, and Pt nanoparticles in the presence of adsorbates such as iodide ion, cysteine, mercaptoacetic acid, mercaptopropionic acid, and thiourea could reduce lucigenin (bis- N -methylacridinium) to produce chemiluminescence (CL). Lucigenin−Ag−KI system was chosen…
Aligned multiwalled carbon nanotubes (MWCNTs) were grown on both sides of a metallic or metal-coated substrate by water-vapor-assisted chemical vapor deposition (CVD). Aligned CNT films with thicknesses ranging from 1 to >100 μm were obtained. By manipulating various operating factors, namely, the position of the subs…
In the present study we compared the clot inducing and dissolving properties of Calotropis gigantea R. Br. (Asclepiadaceae), Synadenium grantii Hook. f. (Euphorbiaceae) and Wrightia tinctoria R. Br. (Apocynaceae) latex extracts. All the three latex extracts hydrolyzed casein, fibrinogen and crude fibrin dose-dependent…
Abstract The relationship between the structure and the optical properties of isotactic polypropylene (PP) containing 1,3:2,4‐di‐ p ‐methylbenzylidene sorbitol (MDBS) has been studied. It is found that thinner injection‐molded plaques of PP/MDBS show higher levels of transparency than compression‐molded plaques. The e…