Materials Literature
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The aim of research is to develop an area of nanoporous ceramics of ternary systems. Nanoporous ceramic system SiO 2 -TiO 2 -ZrO 2 has been synthesized via sol-gel technology by hydrolysis of tetraethylorthosilicate (TEOS), zirconia and titanium alcoxides solutions. The sols have been polymerized at room temperature t…
Terahertz imaging systems have received substantial attention from the scientific community for their use in astronomy, spectroscopy, plasma diagnostics and security. One approach to designing such systems is to use focal plane arrays. Although the principle of these systems is straightforward, realizing practical arc…
We studied the influence of prolonged thermal treatment on the concentration and the acceptor energy level positions in p-CdTe samples. We found that heating them at 720 K entails a decrease in the concentration of electrically active centers, i.e., a "self-cleaning" of the adverse effects of some contaminants. In sam…
We compared the interdiffusion of a Ta/Mg/Fe/Ta/Pd thin film system after deuterium absorption and desorption at 250°C with an annealing of the film structure to 250°C. The combined X-ray and neutron reflectometry study shows that the layers start to interdiffuse at 250°C with the film structure still clearly visible.…
Crystalline silicon carbide is a wide bandgap semiconductor material with excellent optical properties, chemical inertness, radiation hardness and high mechanical strength at high temperatures. It is an excellent material platform for sensor applications in harsh environments such as combustion systems and nuclear rea…
Single layer transition metal dichalcogenides are 2D semiconducting systems with unique electronic band structure. Two-valley energy bands along with strong spin-orbital coupling lead to valley-dependent carrier spin polarization, which is the basis for recently proposed valleytronic applications. These systems also e…
Photorefractive (PR) hybrid liquid crystal (LC) cells have combined the space-charge field generated in either a polymer (using e.g. PVK;C60) with the large birefringence from a LC layer to generate PR grating for beam coupling applications. The efficiency of PR beam coupling in hybrid devices is dependent on the ampl…
The main goal of the presented study is the development of two agrofibres – hemp/flax and hemp/hemp shive reinforced hybrid biocomposites based on waterborne polymer matrix system – blends of biodegradable polyhydroxybutyrate (PHB) and poly(vinyl alcohol) (PVA). The correlation between agrofibre ratio and mechanical c…
Enhancing solar cell conversion efficiency by angular confinement of radiative emission (photoluminescence) requires a combination of (1) high external luminescent efficiency, and (2) optics that can substantially and efficiently limit the angular range of cell luminescence. After covering the basic principles and rec…
Wydawnictwo SIGMA-NOT wydaje czasopisma fachowe informujące swoich czytelników o najnowszych osiągnięciach naukowych i nowoczesnych rozwiązaniach technicznych w Polsce i na świecie, popularyzuje problemy techniczne oraz poszerza wiedzę i kulturę techniczną.
Cyclic to prevent the formation of bis-phenanthroline copper(I) complexes but also too small to prevent the threading of the PP ligand: the combination of steric constraints with the topological restriction imposed by the macrocyclic phenanthroline ligand drives the complexation process and affords unprecedented heter…
In the title compound, C44H37BN4O2, the dihedral angle between the plane of the porphyrin macrocycle ring system [r.m.s. deviation = 0.159 (1) Å] and those of three phenyl rings are 66.11 (4), 74.75 (4) and 57.00 (4)°. The conformational distortion is characterized by a mixture of ruffled, saddle and in-plane distorti…
The ESA mission Solar Orbiter (SOLO) is dedicated to the study of Solar Atmosphere and Heliosphere. As a part of the payload, the instrument METIS (Multi Element Telescope for Imaging and Spectroscopy) will provide images of the corona, both in the visible range and at the hydrogen Lyman-α emission line (121.6 nm). Th…
Wydawnictwo SIGMA-NOT wydaje czasopisma fachowe informujące swoich czytelników o najnowszych osiągnięciach naukowych i nowoczesnych rozwiązaniach technicznych w Polsce i na świecie, popularyzuje problemy techniczne oraz poszerza wiedzę i kulturę techniczną.
In 1980, Peter Franken, the second director of the Optical Sciences Center, recruited an international quartet of faculty members from the US, Canada, England and Israel (DS). Peter shaped the Center as a clockwork operation, nailing down every aspect of its administration, business model and academic vision. I found…
MASH stands for Macros for the Automation of SHadow". It allows to run a set of ray-tracing simulations, for a range of photon energies for example, fully automatically. Undulator gaps, crystal angles etc. are tuned automatically. Important output parameters, such as photon flux, photon irradiance, focal spot size, ba…
A perfect lens with unlimited resolution has always posed a challenge to both theoretical and experimental physicists. Recent developments in optical meta-materials promise an attractive approach towards perfect lenses using negative refraction to overcome the diffraction limit, improving resolution. However, those ar…
It has been designed a new type of interferometer working in extreme ultraviolet (XUV) region and intended for direct imprinting of densest possible (for given wavelength) interference pattern into a substrate. The interferometer belongs to the wave-front division category: each of its two aspheric mirrors reflects ap…
The fully conjugated poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) was a low energy gap (Eg) organic polymer material with polydispersity index (PDI) 1.3. It’s the highest occupied molecular orbital (HOMO) 5.2 eV, the lowest unoccupied molecular o…
Photonic crystal based nano -displacement sensor for horizontal as well as vertical displacement has been proposed. The design is highly sensitive in the displacement region 40nm–120nm with sensitivity 0.00461nm-1 for horizontal displacement of the moving PhC waveguide. For vertical displacement of the moving PhC wave…