Materials Literature
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The elastic properties of graphene have been described in terms of the Keating model. It has been shown that the two-dimensional structure of graphene is described by two independent elastic constants, like an isotropic solid. The Young’s modulus and the Poisson’s ratio have been determined. The results are compared w…
Porous silicon (PS) which has different properties from the bulk material due to the quantum confinement effects is beside other physical properties (e.g., light emitting) bioactive or even bioresorbable. The aim of this paper is to optimise the experimental conditions for the fabrication of nanostructured Si particle…
In this study, the sorption of Cu(II) ions from aqueous solution onto NaOH-treated kenaf core fibres was investigated. The kenaf core fibres were milled into different sizes and treated with NaOH before being used to investigate their efficiency in removing Cu(II) ions from aqueous solutions. Sorption studies were per…
The paper provides an example of a test programme, which aims to add to the evaluation of composite insulators after they have being supplied. It is to be considered as a tool to prove the product quality versus the submitted reports from international standards. The proposed tests are not selected to discriminate aga…
Sorption of heavy metal cations on rhyolitic and andesitic bentonites from Central Slovakia The main purpose of this work was to determine adsorption characteristics of heavy metal cations on two Slovak bentonites. Adsorption of Pb 2+ , Zn 2+ , Cu 2+ and Cd 2+ on Jelšový Potok (JP) and Lieskovec (L) bentonites was stu…
Open quantum dots provide a window into the connection between quantum and classical physics, particularly through the decoherence theory, in which an important set of quantum states are not "washed out" through interaction with the environment–the pointer states provide connection to trapped classical orbits which re…
Abstract A chrome‐free conversion coating treatment for magnesium by phytic acid solution was developed. The immersion experiments were used for evaluating the effects of the processing parameters (such as conversion temperature and time, concentration and pH value of phytic acid solution) on the corrosion resistance…
Thin film samples of multi-walled carbon nanotubes (MWCNTs) were irradiated with 120 MeV gold ions. Transmission electron microscopy (TEM) images of the pristine and irradiated samples were obtained. TEM pictures show that in the irradiated sample, the CNTs are in general shorter and some have their inner cores filled…
An investigation about the effect of boron contents and heat treatment on the corrosion resistance of a Ni-Ti alloy in simulated human body fluid environments has been carried out using electrochemical techniques. Tested alloys included 55 (wt %) Ni-45Ti with 250, 500 and 1000 ppm B with and without heat treatment at…
Synthesis of thioguanine (TG)-capped Au nanoparticles (Au@TG) and their enhanced in vitro antimicrobial and anticancer efficacy against Micrococcus luteus, Staphylococcus aureus, Pseudomonas aeruginosa, E. coli, Aspergillus fumigatus, Aspergillus niger and Hep2 cancer cell (Human epidermiod cell) have been reported. T…
The dependences of low-cycle durability of 11 corrosion-resistant steels of the main grades on gaseous hydrogen pressure within the range of 0.1…35 MPa at 293 K have been obtained. Homogeneous austenitic steels as well as the steels with intermetallide strengthening possess the highest service ability in hydrogen. Ni–…
Abstract Conversion coatings on a magnesium alloy were obtained by dipping AZ31 specimens in aqueous solutions of sodium salts of mono‐carboxylic acids (stearic, palmitic, myristic, lauric, mono‐carboxylate ion concentration from 1 to 5 mM, depending on the salt solubility) for 24 and 72 h at room temperature, or 24 h…
Green-emitting phosphors based on lanthanum-gadolinium oxybromide were synthesized in a single phase form by the conventional solid state reaction method, and photoluminescence properties of them were characterized. The excitation peak wavelength of (La1-xGdx)OBr:Tb3+ shifted to the shorter wavelength side with the in…
In high-altitude regions, printed circuit boards are affected by both low pressure and contamination, which may lead to discharge and even the failure of electrical devices. From the viewpoint of safety and reliability, it is necessary to investigate the effects of the pressure on tracking failure of contaminated prin…
Mesoporous cobalt oxide (Co3O4) films were deposited on ITO coated glass substrates by electrodeposition from an aqueous CoSO4 solution using CTAB (cetyltrimethylammonium bromide) as the templating agent. The structures of the synthesized films were characterized by X-ray diffraction, and X-ray photoelectron spectrosc…
Results are given of theoretical study into the propagation of acoustic disturbances in mixtures of liquid with vapor-gas bubbles in view of interphase diffusion mass transfer. A unified general dispersion relation is obtained, which defines the propagation of harmonic disturbances in two-phase mixtures of liquid with…
In this study, commercial poly vinyl chloride (PVC) films were treated by oxygen and argon plasmas in a cylindrical glass tube which was surrounded by a DC variable magnetic field, with different sample positions in the plasma reactor and also different exposure durations. Effects of the plasma treatment on the hydrop…
Effect of the component concentration of an orthophosphate-tetraborate aqueous electrolyte on the thickness, composition, surface structure, and protective properties of coatings deposited from this electrolyte was studied.
In this study we describe the fabrication and characterization of nanocomposites consisting of layer-by-layer assembled polyaniline, sulfonated polystyrene, and maghemite nanoparticle layers. In order to assemble the starting components via electrostatic interaction, stable magnetic fluid containing maghemite nanopart…
Abstract Silk is made of natural protein, and can be damaged by heat, light, hydrolysis, etc . It deteriorates during burial, storage, display, studying and conservation treatment such as cleaning. Ancient silk fabrics are very precious, so their deterioration in museums has long been a concern for many conservators.…