Materials Literature
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We have investigated the variation of electron velocity in AlGaN/GaN heterostructures depending on illuminating light intensity and wavelength. It is shown that the electron velocity at high electric field increases under above-band light illumination. This electron velocity enhancement is found to be related to the p…
Shape memory alloys belong to a group of smart, functional materials with a unique ability to "remember" the shape that they had before the pseudo-elastic deformation. Cu-Al-Ni shape memory alloys are today the only available high-temperature SMA, showing good resistance to functional load, however their biomedical ap…
Switchability is a highly sought after feature for planar optical systems. Suspensions of nanomaterials can be used for generating controllable changes in such systems. We report a planar diffractive microfluidic lens which integrates controlled dielectrophoresis (DEP) for trapping suspended nanomaterials. Silicon and…
Thermomechanical reclaiming of ground tire rubber (GTR) was performed using a co-rotating twin screw extruder. Based on response surface methodology (RSM) the influence of reclaiming conditions (temperature of barrel, screw rotational speed, feed rate) on the processing (screw torque) and properties of reclaimed rubbe…
We have studied the ways of increasing the durability of low-alloy structural ferrite-pearlite steels and researched their possible effective use in a grade composition. The statistic processing of an array of industrial smelts has proved possible increasing of the durability owing to both solid-solution strengthening…
The results of experimental studies of the strength of the normal sections of rubcon-concrete two-layer bending building structures are presented in the paper.Studies of two-layer rubcon-concrete bending structures were carried out in connection with the need for effective building structures, designed for use in corr…
The possibility for realization of measures on a reduction in nitrogen oxides emission on a TGME-464 (plant no. 2) boiler of the IRU power plant (Tallinn, Estonia) is investigated. Low-cost techno-logical measures, namely, nonstoichiometric burning and burning with the moderate controlled chemical underburning, are pr…
We propose a novel mechanism of light manipulation by using the quantum metamaterial which consists of a large number of linearly arranged superconducting charge qubits. The experimental confirmation of this idea may open up a new way to potentially powerful quantum computing.
In this paper ceramization (ceramification) of polymer composites is presented as a promising method for gaining flame retardancy of the materials. Because of its passive fire protecting character, ceramization effect can be applied in polymer composites, which are dedicated for work in public places like shopping cen…
This paper discusses a unique and flexible mode of applying fine abrasive grains in the form of mesoscale elastomagnetic abrasive balls, controlled using magnetic field, to achieve micro/nanoscale surface finish. The proposed balls are easy to load in the working gap to form an elastomagnetic abrasive brush that can b…
In this study, NiN-based resistive switching (RS) random access memory was doped with various concentrations of oxygen, and its uniform set/reset operation and current levels were examined. As compared with undoped RS layers, RS layers deposited with an oxygen flow rate of 5 sccm were more uniform and exhibited higher…
ABSTRACT Previously, it was found that extruded (200 nm) polymer vesicles are capable of fusion into giant polymersomes using agitation in the presence of salt. In this study, several factors contributing to this phenomenon, including the effects of (i) polymer vesicle concentration, (ii) agitation speed and duration,…
This paper constitutes a review of the literature concerning properties and applications of the single polymer composites (SPC). These materials are a relatively new and promising group of polymer composites which have good mechanical properties and high potential of application. The types and selected properties of s…
In the modern era, humankind is making daily progress through industrialization. As various types of diseases are prevailing worldwide, scientists are using many approaches to manage these diseases, such as gene therapy. A nanoparticle (NP)-based approach is an example of a modern method used to address several pathol…
Abstract The reactions of silicotungstate, 2,5‐bis(3‐pyridyl)‐1,3,4‐oxadiazole (3‐bpo), and copper, cobalt, or nickel acetate under hydrothermal condition yield the three compounds [(SiW12O40)Cu2(3‐bpo)2(C5H4NCOOH)2]·H2O (1), [(SiW12O40)Co2(3‐bpo)2(C5H4NCOOH)2(H2O)2]·2H2O (2), and [(SiW12O40)Ni2(3‐bpo)2(C5H4NCOOH)2(H2…
Bei nahezu allen Verwertungswegen von Biogas ist ein möglichst geringer Schwefelwasserstoffgehalt des Biogases anzustreben, um korrosive Schäden an Komponenten der Biogasanlage zu vermeiden. Die hier vorgestellten Untersuchungen zeigen, dass Schwefelwasserstoff im Biogasprozess nicht nur bei der Umsetzung von organisc…
We propose a method for the design of a freeform reflector by means of feedback methods to create light-emitting diode (LED) sources with uniform illuminance. A reflector is first designed to obtain a uniform circular light distribution for a point source. Then the optical performance of the reflector is investigated…
Concrete is a versatile and the most widely used material in the world. According to a recent survey, its annual production is one cubic meter per person. Historically, it is an old material, which has evolved tremendously during the passage of time. This paper envisages the most recent smart developments in this wond…
Despite extensive work on the controlled surface modification of carbon with redox moieties, to date almost all available methodologies involve complex chemistry and are prone to the formation of polymerized multi-layer surface structures. Herein, the facile bifunctional redox tagging of carbon nanoparticles (diameter…
Nanostructured bi-layer graphene samples formed through catalytic etching are investigated with electrostatic force microscopy. The measurements and supporting computations show a variation in the microscopy signal for different nano-domains that are indicative of changes in capacitive coupling related to their small…