Materials Literature
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Special features of the diamond seed-growth in the Mg-C growth system at pressure ≤ 8.2 GPa and a temperature of ∼ 1800–2000°C have been studied. The grown diamonds have been investigated by Raman, photoluminescence, and IR spectroscopies. It has been shown that single crystals produced in this system are type II a +I…
The adsorption of atomic nitrogen on Ni/Pt(111) surface bimetallics has been investigated as a function of the local microstructure of Ni and Pt atoms via density functional theory (DFT) calculations. Microstructures include surface and subsurface Ni atoms on Pt(111) as limiting cases, and also small clusters of Ni in…
Solution combustion synthesis technique is one of the novel techniques used to prepare nanoparticles, multi-component ceramic oxides and nanocomposites with properties better than conventionally prepared one and these materials have been used for various applications such as sensors, catalysts, and materials for solid…
This paper reports a rapid and eco-friendly green method for synthesis of silver nanoparticles from silver nitrate solution using loquat leaf extract. Effect the amount of leaf extract, reaction time, silver nitrate concentration and temperature were investigated. Biosynthesized silver nanoparticles (AgNPs) were chara…
A method for parameter identification of J-A hysteresis model is presented. This method is based on combination of pattern search and nonlinear least square method. The B-H curve of different toroid and Epstein samples are obtained experimentally. The parameters of J-A model are determined by proposed parameter identi…
First-principles calculations of fundamental magnetic properties were performed for ordered MnBi, MnBi-Co, and MnBi-Co-Fe alloys to evaluate maximum energy product (BH)max. Full potential linear-augmented plane wave (FLAPW) and linear-muffin-tin-orbital (LMTO) calculations using density functional theory (DFT) within…
Abstract The use of photochromes for the implementation of molecular logic operations is a very promising approach toward molecular computing. This statement is based on a) the possibility of operating such molecular devices exclusively with photonic signals and b) spatiotemporally and remotely controlled switching, w…
This contribution gives an overview of different simulation methods for transient events and damages induced in tungsten. The investigations were focussed on the resulting crack networks and special attention was paid to crack distance, width and depth. The results indicate that the different techniques show, in gener…
This paper presents the results of measurements of the magnetic and electrical properties of the ferromagnetic alloy Co2CrAl in two structural states: (i) after severe plastic deformation and (ii) after shortterm high-temperature annealing of the deformed specimens. The experiments have been performed at temperatures…
In this study, radio frequency magnetron sputtering was used to deposit nickel oxide thin films (NiO, deposition power of 100 W) and titanium-doped zinc oxide thin films (TZO, varying deposition powers) on glass substrates to form p(NiO)-n(TZO) heterojunction diodes with high transmittance. The structural, optical, an…
The strain dependent magnetocaloric properties of La0.67Sr0.33MnO3 thin films deposited on three different substrates (001) LaAlO3 (LAO), (001) SrTiO3 (STO), and (001) La0.3Sr0.7Al0.65Ta0.35O9 (LSAT) have been investigated under low magnetic fields and around magnetic phase transition temperatures. Compared to bulk sa…
Enzymes are essential in the human body, and the disorder of enzymatic activities has been associated with many different diseases and stages of disease. Luminescent semiconductor nanocrystals, also known as quantum dots (QDs), have garnered great attention in molecular diagnostics. Owing to their superior optical pro…
The switching effect, field and temperature dependences of the permittivity and conductivity of TlGaTe 2 crystals subjected to various γ-irradiation doses are studied. Under rather low electric fields, the phenomenon of threshold switching with an S -shaped current-voltage characteristic containing a portion with nega…
Titanium dioxide (TiO 2 ) films were deposited on fluorine-doped tin-oxide (FTO) glass by sputtering and sol–gel combustion (SGC) coating methods and investigated with respect to their electrochemical luminescence (ECL) performance. The sputtered TiO 2 films were denser than the SGC-deposited films, while the SGC film…
Peculiarities of the formation of the high-coercivity state of sintered magnets prepared from a rare-earth-metal-depleted Nd-Pr-Dy-Fe-B composition alloyed with terbium hydride were studied. Terbium hydride additions were shown to increase substantially the magnetization coercive force and to decrease slightly the res…
Nanosilica powder produced from rice husk ash (RHA) via NaOH treatment has particle size in the range of 10-20 nm as revealed by transmission electron microscopy (TEM). The inhibitive action of nanosilicate from RHA on the corrosion of carbon steel SAE1045 in 0.5M HCl solution was studied using weight loss and potenti…
The synthesis of aligned multi-walled carbon nanotubes (MWCNTs) using thermal and floating catalytic chemical vapor deposition (CVD) method has been optimized in order to obtain MWCNTs with specific characteristics namely diameter and thickness of nanotubes array. Process parameters such as substrate preparation which…
Characteristics of a field-electron emitter based on a nitrocelulose-multiwalled carbon nanotube composite have been studied. A new method of the recording and online processing of current-voltage ( I–U ) characteristics of multipoint field-electron emitters has been developed for monitoring the evolution of their pro…
Resonant bending-mode magnetoelectric (ME) coefficients of magnetostrictive-piezoelectric multilayer cantilevers are calculated analytically using a model developed for arbitrary multilayers on a substrate. Without quality factor effects the ME coefficient maxima in the four-dimensional parameter space of layer number…
This study deals with the need to develop analytical instruments to optimise rescue operations involving radiological exposure. It reports several aspects of analysis and characterisation of orphan radioactive sources. The protection problems in cases of detection and securing of radioactive sources are analysed, with…