Materials Literature
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Demand for stable and easily-accessible energy is constantly growing. It is obvious that renewable energy sources cannot meet all the needs of modern human civilization. Thus, it is extremely important to find an effective and environmentally safe way of extracting energy from natural resources. Fuel cells could make…
Henkel AG & Co KGaA (Henkel) now offers a range of new-generation metal pretreatment processes, as briefly outlined here, in the first of this month's technology focus articles.
Neutrons have become an increasingly powerful and sophisticated tool in structural biology over the last 10-15 years. Major improvements in sources, instrumentation and sample preparation have radically changed the scope of neutron scattering approaches for studies of biological macromolecules in solutions, crystals a…
Nanostructured electrodes were prepared based on titanium dioxide (TiO 2 ) modified by incorporating small amounts of magnesium oxide (MgO) to improve their efficiency in dye sensitized solar cells. J-V curve measurements show efficiencies increased from 2.32 to 2.55 % with the addition of MgCl 2 . On the other hand,…
The effect of nanosecond pulses of laser radiation of different energy on the oriented CNT array synthesized by catalytic plasma-induced deposition from a gas phase on a silicon substrate was studied. It is shown that the following effects are possible: CNT ablation, the effect of CNT alignment (straightening), singli…
To investigate the plasmonic effect in perovskite solar cells, the effect of depositing Au@SiO2 nanoparticles on the top and the bottom of mesoporous TiO2 layers was studied. First, Au@SiO2 nanoparticles were synthesized. The particles were then deposited at the different interfaces of mesoporous TiO2 layers. Although…
The investigation and development of new functional two-dimensional materials is one of the most important challenges for terahertz (THz) photonics and optoelectronics. These materials allow to dynamically manipulate the properties of the THz radiation. Graphene and graphene-based materials are the promising candidate…
Phase equilibria in the Cu 2 Se-SnSe-Sb 2 Se 3 system were studied along the SnSe-CuSbSe 2 section by means of differential-thermal analysis and X-ray diffraction technique and its phase diagram was constructed. It was found that the SnSe-CuSbSe 2 section is quasibinary and refers to an eutectic type with limited soli…
Although simulated annealing has become a useful tool for optimization of many systems, its initial raison d'etre of achieving the groundstate structure for a spin or atomic/molecular condensed system remains important. Such modelling, whether using analog models such as glass beads or by invoking simple computer mode…
In this work, the influence of the deep level type on a switching time delay of GaAs avalanche S-diodes is investigated. It is shown that the dependence of time delay on voltage can be approximated by an exponential function. The 1.5 times increase of voltage leads to significant decrease of time delay (up to 1000 tim…
Material have researched electromagnetic wave absorber based barium hexaferrite BaNiAl 6-x Fe 6 O 19 (x = 0; 0.5; 1; 2; 3) of the local raw materials sand iron Sukabumi. This material is synthesized by coprecipitation method and mixing it using solid state reaction. Material in milling for 5 hours, and heated (sinteri…
Simulation of moiré pattern arising on plan-view transmission electron-microscope image of nanoisland (quantum dot) containing dislocations was performed on the base of finite-element method. The presence of dislocations with a screw component of Burgers vector in the nanoisland is shown to be energetically unfavourab…
The paper presents the results of developing positioning catalytic centers technology for the local growth of carbon nanotubes using non-standard techniques of nanometer resolution lithography explosive. It is shown that using of ZnO as a sacrificial layer is promising for the formation of nanoscale catalytic centers,…
The magnetic properties of chromite ACr2S4 ([Formula: see text]n, Cd and Hg) spinels have been investigated. The first, second and the third nearest-neighbor exchange interactions are included into a Metropolis-based Monte Carlo calculation for the three-dimensional Ising model. Transition temperatures have been deduc…
Inelastic tunneling of electrons can be used for generation of the surface plasmon-polaritons (SPPs). In this paper, we study numerically the surface waves generation during the electrons tunneling through the barrier between tip of the scanning-tunneling microscope probe and golden substrate. To study the process the…
Abstract The region of thermal stability of the size and phase composition of silver sulfide (Ag2S) nanoparticles is determined. Nanopowders consisting of Ag2S nanoparticles 475–50 nm in sizes are produced by chemical deposition from aqueous solutions. To analyze the thermal stability of Ag2S nanoparticles, nanocrysta…
The purpose of this study is to investigate the effect of ferredoxin on sensing properties of chitosan-based acetone sensors. The composites were facilely prepared and their sensing properties toward low concentration of acetone have been investigated at room temperature. The improvement of electrical and physical con…
Nowadays the prediction of ionospheric parameters is an important and acute problem in the field of ensuring stable operation of radio communication and radio navigation facilities. The network of two-frequency GPS receivers data is used for monitoring the ionospheric condition. Based on these data, a number of labora…
The paper deals with analysing of ultrasonic measurements realised at a constant frequency 13 MHz and the temperature above 300 K – acoustic attenuation of metaphosphate ion conductive glasses. Attenuation measurements have revealed that relaxation peaks from experimental studies of glasses are much broader than those…
The paper discusses one of the promising approaches for the synthesis of graphene formed at the interface in the Langmuir bath. The results of the investigation of the formation of pyren monolayers (both initial elements of graphene) and a mixture of pyrene and arachidic acid are presented. It is shown how the mechani…