Study of Structure of Li- and Mn-rich Transition Metal Oxides Using 4D-STEM
Alpesh Khushalchand Shukla, Colin Ophus, Christoph Gammer, Quentin Ramasse; Study of Structure of Li- and Mn-rich Transition Metal Oxides Using 4D-STEM, Mi
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Modeling of soft phase transfer to the surface of multicomponent aluminum alloy in friction
A model for calculating the dependence of the amount of solid lubricant formed on the surface of a multicomponent aluminum alloy in friction is proposed. The constructed model is applied to analyze how the properties of the matrix and soft structural components as well as the alloy structure influence the amount of th…
The stability of tin silicon oxide thin-film transistors with different annealing temperatures
The influence of annealing temperature on the electrical properties of tin silicon oxide (TSO) thin-film transistors (TFTs) and the corresponding bias stress stability have been investigated. With increasing annealing temperature, the TSO films present a structure which is closer to crystallization, and it is conduciv…
Optical absorption and luminescence studies of fast neutron-irradiated complex oxides for jewellery applications
We studied the optical absorption and luminescence of agate (SiO2), topaz (Al2[SiO4](F,OH)2), beryl (Be3Al2Si6O18), and prehnite (Ca2Al(AlSi3O10)(OH)2) doped with different concentrations of transition metal ions and exposed to fast neutron irradiation. The exchange interaction between the impurity ions and the defect…
Electronic transitions of iron in almandine-composition glass to 91 GPa
Valence and spin states of Fe were investigated in a glass of almandine (Fe 3 Al 2 Si 3 O 12 ) composition to 91 GPa by X-ray emission spectroscopy and energy- and time-domain synchrotron Mössbauer spectroscopy in the diamond-anvil cell. Changes in optical properties, total spin moment and Mössbauer parameters all occ…
Recent μSR Studies of Insulating Rare-Earth Pyrochlore Magnets
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Calcium Cobalt Hexacyanoferrate Cathodes for Rechargeable Divalent Ion Batteries
Calcium cobalt hexacyanoferrate (CaCoHCF) was synthesized and tested as a cathode material for rechargeable batteries, using divalent cations (Mg2+, Ca2+, Ba2+). CaCoHCF demonstrated reversible specific capacity and coulombic efficiency (in parentheses) of 45.49 mAh/g (99.18%) for Mg2+, 55.04 mAh/g (99.2%) for Ca2+, a…
Performance evaluation of a new Kalman filter based least mean square algorithm for power quality improvement
This paper discusses an innovative control strategy for controlling distribution static compensator (DSTATCOM) in a three-phase; three-wire distribution network. It is based on the combination of Kalman filtering (KF) and least mean square (LMS) algorithm for closed loop control. It incorporates the simplicity of the…
Hybrid Energy Storage Systems integrating battery and Ultracapacitor for the PJM frequency regulation market
In this paper, the economic analysis on the utilization of the Hybrid Energy Storage System (HESS) for PJM frequency regulation market is performed. The HESS includes the Lithium-Ion battery and the Ultracapacitor (UC). A power sharing strategy is used to reduce the stress of the battery with the help of the UC. The f…
Electrochemical generation of ozone in a system with a solid polymer electrolyte
Mechanisms of ozone generation in an electrochemical system with a solid polymer electrolyte and the electrode and catalytic materials used in systems of this kind are considered. The influence exerted by the process parameters and by the type of electrolyte and electrocatalysts on the productivity of the system and o…
Influence of moisture and temperature on the frequency domain spectroscopy characteristics of transformer oil
Transformer oil is an important liquid dielectric of oil-immersed transformers. Moisture and temperature bring a great harm on the transformer insulation. This research was carried out to find the influence of moisture and temperature on the frequency domain spectroscopy (FDS) characteristics of transformer oil. As a…
Removal of heavy metal ions from water by an combined sorption–crystallization process using activated clays
The degree of comminution of materials in an ultrasonic field has been theoretically estimated by calculating the maximum and minimum energy inputs necessary for this process (upper and lower estimates have been obtained). The degree of comminution of kaolin in an ultrasonic bath determined by light and electron micro…
Capillary microreactor with a catalytic coating based on mesoporous titanium dioxide for the selective hydrogenation of 2-methyl-3-butyn-2-ol
A continuously working capillary microreactor with a catalytic coating based on mesoporous titanium dioxide with embedded Pd nanoparticles was tested in a reaction of the selective hydrogenation of 2-methyl-3-butyn-2-ol (MBI). The catalytic coatings were obtained by the supporting of a carrier sol, which contained col…
Fast and enhanced removal of mercury from aqueous solutions by magnetic starch-g-poly(acryl amide)/graphene oxide nanocomposite superabsorbents
In this study, we developed a novel magnetic nanocomposite superabsorbent (MNS) for effective removal of mercury ions from aqueous solutions. The preparation method of MNS is easy, fast, simple, effective, and safe. The MNSs were synthesized via the simultaneous formation of magnetic iron oxide nanoparticles (MIONs) a…
Controlled Aqueous Growth of Hematite Nanoplate Arrays Directly on Transparent Conductive Substrates and Their Photoelectrochemical Properties
Two-dimensional (2D) hematite nanoplate arrays were synthesized directly on fluorine-doped tin oxide (FTO)-coated glass by using a facile and novel hydrothermal method. High-temperature annealing retained the morphology of the nanoplate arrays while simultaneously introducing porosity. The thickness and length of the…
Hierarchical polymer coating for optimizing the antifouling and bactericidal efficacies
The bacteria-repellent and bactericidal functionalities in a single system are generally need to be carefully optimized in order to obtain the highest antibacterial performance. In this study, the controlled SI-PIMP strategy was developed for creating hierarchical polymer brushes possessing the bacteria-repellent and…
Cogging Torque Reduction in Line Start Permanent Magnet Synchronous Motor
Cogging torque has a negative impact on the operation of permanent magnet machines by increasing torque ripple, speed ripple, acoustic noise and vibration. In this paper Magnet Shifting Method has been used as a tool to reduce the cogging torque in inset Line Start Permanent Magnet Synchronous Motor (LSPMSM). It has b…
Effects of Nano‐hydroxyapatite/Poly(DL‐lactic‐co‐glycolic acid) Microsphere‐Based Composite Scaffolds on Repair of Bone Defects: Evaluating the Role of Nano‐hydroxyapatite Content
The aim of the current study was to prepare microsphere-based composite scaffolds made of nano-hydroxyapatite (nHA)/poly (DL-lactic-co-glycolic acid) (PLGA) at different ratios and evaluate the effects of nHA on the characteristics of scaffolds for tissue engineering application. First, microsphere-based composite sca…
Low-temperature creation of Frenkel defects via hot electron-hole recombination in highly pure NaCl single crystals
The creation spectrum of stable F centres (being part of F-H pairs of Frenkel defects) by synchrotron radiation of 7–40 eV has been measured for highly pure NaCl single crystals at 12 K using a highly sensitive luminescent method. It is shown that the efficiency of F centre creation in a closely packed NaCl is low at…
Charge separation in organic solar cells: Effects of Coulomb interaction, recombination and hole propagation
Bulk heterojunction (BHJ) organic photovoltaic cells are analysed within a simple efficient model that includes the important physical properties of such photovoltaic systems. In this model, in contrast with most of the previous studies, we take into account the motion of both the electron and the hole in the separati…