Materials Literature
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Our recent experiments show that the surface layer of fused silica manufactured by the magnetorheological finishing (MRF) is different from those finished by conventional polishing technique (e.g. pitch polishing or polyurethane polishing) in mechanical properties. We examined the hardness of the surface layer on fuse…
DC and RF magnetron sputtering techniques were used for growing nano-films ( t <100 nm) of high temperature superconducting (HTS) YBa 2 Cu 3 O 7 (YBCO) and ferromagnetic (FM) manganite La 0.7 Sr 0.3 Mn0 3 (LSMO) materials on LaAlO 3 (LAO) and Al 2 O 3 (ALO) substrates as well as for preparing of single-, double- and t…
Design of various Dammann grating including the equally-spaced, unequally-spaced and circular Dammann grating is introduced in this paper. Dammann grating is pure-phase-modulation grating whose phase transition points are optimized to produce equal-intensity spots at diffractive orders with highly efficiency. Firstly,…
A method for isolation of a highly purified preparation of E. coli RNA polymerase core enzyme was developed based on IMPACT technology and dissociation of the RNA polymerase complex with sigma(70) subunit. Washing of the immobilized RNA polymerase with 5-10 mM solution of glutamate (pH 5.0-5.5) completely removed the…
The influence of dislocation core on the interaction between an edge dislocation and a spherical precipitate was investigated using the combination of the parametric dislocation dynamics and the boundary element method with a dislocation core model. In the results of the simulations, the dislocation core of the edge d…
Identifying the location of binding sites on proteins is of fundamental importance for a wide range of applications including molecular docking, de novo drug design, structure identification and comparison of functional sites. Structural genomics projects are beginning to produce protein structures with unknown functi…
The columnar composites obtained “in situ” through solidification of Al61Cu27Fe12 alloy by the Bridgman method were studied. It has been verified that the matrix consisted of cubic single crystal β phase and the reinforcement of icosahedral quasicrystal ψ phase and monoclinic crystal λ phase, which have the form of ro…
The creep rupture of aramid fibre yarns (Twaron 1000 and Kevlar 29) was studied experimentally at different temperatures. The failure stress and strain data were analysed by statistical techniques. The reliability analysis, including extraction of Weibull parameters and distribution estimation, allows useful conclusio…
This paper presents a brand new hybrid material on the nanometric scale: the antimony sulfoiodide (SbSI) within carbon nanotubes (CNTs). It was prepared in CNTs ultrasonically by using elemental antimony (Sb), sulfur (S) and iodide (I) in the presence of methanol under ultrasonic irradiation (34 kHz, 2.6 W/cm2). The s…
Due to the high two-dimensional electron gas (2DEG) concentration and high temperature stability, lattice matched InAlN/AlN/GaN high electron mobility transistors (HEMTs) have attracted tremendous amount of interest for high-power and high-frequency electronics [1–2]. Employing the gate recess technology, a popular wa…
In this work influence of terbium dopant on hardness of nanocrystalline TiO2thin films have been investigated. Thin films were manufactured by high energy reactive magnetron sputtering process. The structure of TiO2-matrix was modified by doping with 0.4 at. % of Tb. Undoped matrix had directly after deposition TiO2-r…
Materials that are used in everyday life have an immense impact on the development of the human society. During the Stone Age and Iron Age epochs, humans widely used stone or iron to make tools. In the present age, there is no question that polymers and plastics dominate our rapidly developing daily needs and show eno…
The present work deals with the synthesis of various imidazole ionic liquids [BMIM]Cl, [AMIM]Cl, [AEIM]Cl, [HeEIM]Cl and [HeVIM]Cl, the chemical structures of ionic liquids by FTIR and 1HNMR, the pretreatment of wood powder as extracted with a mixture of benzene/ethanol or activated with 25% (mass fraction) NaOH under…
In summary, a novel RRAM with the structure of Cu/SixOyNz/W was first fabricated and its characteristics are thoroughly investigated. The new device exhibited low switching voltages and low reset currents, demonstrating its potential for low-power applications. Repeatable unipolar resistive switching characteristics i…
In the past decade, the development of nanoelectronics and nano-optics has attracted much interest in surface nanostructuring of semiconductor materials. The irradiation of a microlens array by a laser beam generates many focused light spots, which can act as a direct writing tool on photo-polymer materials. This mask…
The Zr-Cu-Ce/ZSM-5 catalysts prepared by the simultaneous ion-exchange showed high activity for NO decomposition in the presence of O2, the highest conversion of NO was up to 75%, indicating that the Ce and Zr addition can enhance the activity of catalysts. A new highly active site, which facilitates oxygen mobilizati…
The influence of instantaneous voltage drops in the power systems due to lightning have become a significant issue, because manufacturing facilities have become highly sophisticated and intelligent. On the other hand, it may be impossible to completely avoid instantaneous voltage drops in power systems caused by natur…
Abstract Reaction-induced phase separation of initially miscible mixtures of poly(Ε-caprolactone) (PCL) and elastomer precursors based on difunctional methacrylate resins was applied to prepare thermoplastic vulcanizates (TPVs) with rubber particle sizes ranging from 80 to 900 nm. The radicals formed by the peroxide d…
Bulk metallic glasses (BMGs) are an emerging class of materials. The amorphous alloys have very attractive properties. There is potential for applications. The quaternary and pentanery (ZrCuAlNi)100-xTix (x = 0, 2 and 5 at. %) alloys were synthesized by melting 2-3N pure metals in an arc furnace. Amorphous ingots were…
The correlation of stress-induced changes in the performance of laboratory-made CdTe solar cells with various 2ndand 3rdlevel metrics is discussed. The overall behavior of aggregated data showing how cell efficiency changes as a function of open-circuit voltage (Voc), short-circuit current density (Jsc), and fill fact…