Materials Literature
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A simple reactive evaporation technique is proposed to obtain highly efficient light emitting Si nanostructures. It is shown that structurally homogeneous SiOx thin films are synthesized by a reactive electron beam evaporation from a mixture of SiO and silica nanoparticles. These SiOx thin films result in the formatio…
A germanium disk on which silver nanoparticles have been deposited by galvanic displacement is shown to be an inexpensive substrate for surface-enhanced Raman spectroscopy (SERS). The preparation, which is based on spontaneous reduction of silver cations at the surface of a germanium disk, is quick and requires nothin…
The structure and elastic properties of (5,5) and (10,10) nanotubes, as well as barriers for relative rotation of the walls and their relative sliding along the axis in a double-walled (5,5)@(10,10) carbon nanotube, are calculated using the density functional method. The results of these calculations are the basis for…
The interaction between electron-electron and electron-hole pairs in semiconductor nanorods embedded in dielectric media is investigated using a configuration-interaction method. Contrary to spherical quantum dots of similar volume, the dielectric confinement is shown to bring nanorods into a regime of strong configur…
Abstract Uniformly sized CdS nanoparticles exhibiting quantum size effect have been synthesized as a suspension in hexane solution containing oleic acid and 9-octadecenylamine as protective ligands. Our study focuses on utilizing the intrinsic optical property of the nanoparticles for photocatalytic H2 evolution and p…
Biodegradable polyester elastomers are widely reported to be applied in varied biomedical fields. In this paper, we attempt to investigate how both the thermal-curing time and molar ratio of the monomers affect the final compositions and properties of the novel poly(glycerol-sebacate-citrate) (PGSC) elastomers. First,…
Vanadium oxide nanotubes with a diameter of 20–100 nm and an aspect ratio of 50–100 were synthesized by hydrothermal method. Young’s modulus of 20–80 GPa was obtained by bending measurements of individual nanotubes using an atomic force microscope. Electrical resistivity and thermopower measurements on a large assembl…
Using photoemission and X-ray absorption spectroscopy, we compare the adsorption properties of NO 2 at 300 K on MgO(100)/Ag(100) films with thicknesses varying from 2 to 8 ML and NO 2 exposures ranging from 0 L to over 25 000 L. We find that NO 2 is stable on 2 ML MgO(100) films, where it is the most abundant adsorbat…
The Young's moduli of electrodeposited Ni with different dimensions were measured carefully in this paper. The dimensions of tensile specimens were 200, 35, or 5 μm thick and 2400, 200 or 50 μm wide. These specimens were measured with three different approaches. The measured Young's moduli of Ni decrease from 122.1 ±…
Abstract The aim of the study was to develop SQUID‐magnetometer system and to reveal the ability of above system to monitor the dynamics of injected magnetic nanoparticles (MNP) into rabbit’s body. MNP were prepared by first precipitation of ferrous hydroxide which was then crystallized into magnetite in the presence…
Structural transformations in thin Ge 2 Sb 2 Te 5 films for phase-change memory applications have been studied by differential scanning calorimetry. As-grown, amorphous films have been shown to undergo structural transitions to a cubic and then to a hexagonal phase. A reproducible endothermic peak has been detected, w…
In this study, the effects of the phase transition on the optical transmittance of the nematic liquid crystal C 21 H 27 NO 2 S, 4′-isothiocyanatophenyl-4-pentylbicyclo[2,2,2]octane-1-carboxylate are investigated in terms of temperature variation and rotational angle of the polarizer through electro-optical methods und…
The main objective of the performed investigations was to enhance sensitivity of a current sensor to weak changes of magnetic field. New design of the sensor of current based on magnetoresistance effect – MRE (MRE = (RH - R0)/R0 , where RH is the resistance in magnetic field and R0 is the resistance without magnetic f…
Abstract It is reasonable to assume that the existence of inherent anti-oxidizing activity of nanotubes and nanofibers (CNT, CNF) would be a good tool for solving the problem of oxidative stability of polymer composites. CNT/CNFs have electron affinities similar to those of fullerenes and are therefore capable of acti…
Experimental positron lifetime data for three vacancy-related defects in synthetic type Ib diamonds with well known structures are uniquely suitable for comparison with theoretical investigations of lattice relaxation.
Abstract Steverustite, ideally Pb 5 2+ (OH) 5 [Cu + (S 6+ O 3 S 2– ) 3 ](H 2 O) 2 , is a new supergene mineral from the Frongoch mine dump, Devils Bridge, Ceredigion, Wales. It generally forms fibrous fan-like bundles that occur in small cavities in quartz veins with other supergene species. Crystals are fibrous to ac…
In the present work, a nanocrystalline nickel-free stainless steels as well as nickel-free stainless steel/hydroxyapatite nanocomposites have been synthesized by the combination of mechanical alloying (MA), heat treatment and nitriding. The microhardness of the final bulk material was studied using Vickers method. Cor…
The compounds Ba2ZnUO6, Ba2CdUO6, and Ba2PbUO6 were prepared by high-temperature solidphase reactions. Their structures (space group Fm $$ \bar 3 $$ m) were refined by the Rietveld method. In the morphotropic series Ba2AIIUO6, correlations were found between the AII-O, U-O, and Ba-O bond lengths and the crystal-chemic…
In this paper the electric field simulation of carbon nanotubes triode field emission devices is investigated. The geometry of CNTs and their arrangement on the substrate affect the screening effect and filed enhancement factor (β). In an array of nanotubes, for a distance smaller than the CNT length the screening eff…
Multidrug resistance (MDR) plays a major role in the failure of cancer chemotherapy. Since Fe(3)O(4)-magnetic nanoparticle loaded with daunorubicin (DNR) can overcome multidrug-resistance of K562 cells in vitro, the effect of Fe(3)O(4)-magnetic nanoparticle loaded with DNR on multidrug-resistant K562 cells was studied…