Materials Literature
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The thermovoltaic effect in the semiconductor rare-earth compound samarium sulfide (SmS) is briefly described. The qualitative dynamic model of the effect for explaining the possibility of the long-term electric voltage generation on the basis of the thermovoltaic effect is proposed. The model uses a combination of th…
The optimum conditions for the extraction and separation of chondroitin sulfate from tilapia (Oreochromis niloticus) byproducts were studied in the paper. The chondroitin sulfate was extracted by the combination of ultrasonic and microwave. On the basis of the single factor tests, the response surface methodology was…
In this paper we present the electronic and magnetic properties of the honeycomb compound In 3 Cu 2 VO 9 . We find that the band dispersions display Dirac cone features in the nonmagnetic phase, as observed in graphene. The parent phase is a charge transfer insulator with an energy gap of about 1.5 eV. Singly occupied…
Objective(s): The aim of this study was to evaluate the final outcome of nerve regeneration across the eggsell membrane (ESM) tube conduit in comparison with autograft. Materials and Methods: Thirty adult male rats (250-300 g) were randomized into (1) ESM conduit, (2) autograft, and (3) sham surgery groups. The eggs s…
The effect of fly ash as a filler for an ESBR-based compound was studied in the range 0-80 phr. Characterization of fly ash, as received, revealed the abundance of 200 mesh size particles with an average diameter of 10 μm; composition analysis showed the predominance of silica and alumina. The properties of ESBR compo…
Results of structuring a titanium surface with femtosecond laser radiation are reported. Formation of an ordered system of microcraters with a diameter of about 2 μm and a step of about 3 μm is observed. The character of this process is determined by the laser-beam transverse structure. The possibility of fixing the s…
Nitride-based metal–insulator–semiconductor (MIS) ultraviolet (UV) photodetectors (PDs) with a hafnium oxide (HfO2) insulating layer was fabricated for the first time and characterized successfully. It was found that we can achieve a small dark current and a large photocurrent to dark current contrast ratio using the…
Cavitation bubbles are known to accelerate therapeutic effects of ultrasound. Although negative acoustic pressure is the principle factor of cavitation, positive acoustic pressure has a role for bubble cloud formation at a high intensity of focused ultrasound when cavitation bubbles provide pressure release surfaces c…
The optical performance of top-down etched InGaN/GaN nanorod light emitting diodes (LEDs) was studied using temperature variable photoluminescence spectroscopy with a 405 nm pump laser. Efficiency droop is measured from such nanorod structures, which is further enhanced with decreasing temperature. Through detailed ra…
We consider quantum fluctuations of near fields of a quantum emitter (two-level system (TLS) with population inversion sustained by incoherent pumping) in the near-field zone of a plasmon (metallic) nanoparticle. The spectrum of surface plasmons excited by spontaneous transitions in the quantum emitter is obtained bel…
Drug delivery technologies are an important area within biomedicine. Targeted drug delivery aims to reduce the undesired side effects of drug usage by directing or capturing the active agents near a desired site within the body. This is particularly beneficial in, for instance, cancer chemotherapy, where the side effe…
Abstract This article provides an overview of key abradable thermal spray coating systems based on predominant function and key design criteria. It describes two families of coatings which have evolved for use at higher temperature: flame (combustion)-sprayed abradable powders and atmospheric plasma-sprayed abradable…
We present simulations of the stretching of a strongly charged, flexible polyelectrolyte chain for long chain lengths particularly focusing on the intermediate force regime, where the Pincus scaling regime occurs. We performed Monte Carlo simulations using the screened Coulomb potential for 200 mM added salt. The numb…
We present calculations of Majorana edge modes in cylindrical nanowires of a semiconductor material with proximity-induced superconductivity. We consider a Rashba field along the transverse direction and an applied magnetic field in arbitrary orientation. Our analysis is based on exact numerical diagonalizations for t…
We have studied the transmission of light through a multilayer system of plane-parallel monolayers of monodisperse nonabsorbing spherical alumina particles under conditions of normal illumination in the wavelength range of 0.3–1.0 μm. In the quasi-crystalline approximation of the theory of multiple scattering of waves…
Bismuth oxybromide (BiOBr) flower‐like microspheres have been successfully synthesised via a polyethylene glycol 600‐assisted solvothermal process in the presence of reactable ionic liquid (IL) 1‐hexadecyl‐3‐methylimidazolium bromide. The morphology and compositional characteristics of BiOBr were investigated by X‐ray…
It has been recognized the role of supports in electrocatalysis as a way to increase both specific activity and lifetime of electrocatalysts. Due its stability, some doped SnO2 supports could be used as an alternative to carbon black in PEM water electrolysis. In this work, IrO2 catalyst was mixed in a colloidal mini-…
Let Fn be the nth Fibonacci number. The order of appearance z(n) of a natural number n is defined as the smallest natural number k such that n divides Fk. In 1975, J. Sallé proved that z(n) ≤ 2n, for all positive integers n. In this paper, we shall provide sharper upper bounds for z(n) which are substantially smaller…
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
The growth of series of actual laser crystals belonging to dierent structural types by the Czochralski method is presented. The primary attention is given to single crystalline compounds and their solid solutions with garnet structure (scandium-containing rare-earth garnets with general formula {LnSc}3[ScMe]2Me3O12, M…