Materials Literature
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Gas desorption induced by friction of solids, i.e. tribodesorption, is one of the numerous physical and chemical phenomena, which arise during friction as result of thermal and structural activation of material in a friction zone. Tribodesorption of carbon oxides, hydrocarbons, and water vapours may lead to significan…
We report heteroepitaxial growth of multiferroic BiFeO 3 thin films by RF magnetron sputtering on lattice-matched SrTiO3 substrates, as well as preparation and electrical properties of the heterostructures formed by growing BiFeO 3 thin films on highly conductive LaNiO 3 films and n-Si substrates. Nonlinear and rectif…
The term “electrochemical capacitor” describes a diverse class of energy-storage devices that incorporate a variety of active materials (high surface-area carbons, electroactive polymers, and transition metal oxides and nitrides), electrolytes (conventional aqueous and nonaqueous electrolytes, advanced polymer electro…
A method for the synthesis of easily-tested circuits consisting of functional elements in basis {&, ∨, − } for Boolean functions is proposed. The malfunctions are taken in the form of constant faults of the type “1” at the element outputs. It is proved that, for these circuits, the length of the complete checking test…
Abstract We display that a tetracyanoplatinate(II) forming a charge-transfer complex with methyl viologen dication in the crystal exhibits intense luminescence despite no direct Pt···Pt interaction.
The relationship between field-emission characteristics and defects measured by Raman scattering for printed carbon-nanotube cathodes treated by plasma and laser was investigated. The Raman intensity ratio of the D to G bands (ID/IG) was 0.71 in the case of an untreated sample. With laser irradiation, the ID/IG ratio…
Abstract Ultrafine poly(2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylene‐vinylene) (MEH‐PPV)/polyvinylpyrrolidone (PVP) blend fibers with the average diameters ranging from 625 nm to 1.46 µm were prepared by electrospinning of polymer blend solutions in the mixed solvent of chlorobenzene and methanol. The average diameter…
Abstract Eri cocoons were prepared into short fibers and subsequently blended with cotton fiber in order to develop the new fiber blended yarn in the short spinning system. The Eri and cotton fibers were blended using the drawframe blending with varying blending factors, viz. blending composition (0–100%) and yarn cou…
The structural and elastic properties under pressure effect of Hf2AlC and Hf2AlN have been studied using the pseudo-potential plane-waves method based on density functional theory. Lattice parameters and their pressure dependence as well as elastic constants and their pressure dependence were calculated. We derived th…
In this work, the Fourier transform infrared (FT-IR) and Fourier transform Raman (FT-Raman) spectra of 2-aminobiphenyl (2ABP) were recorded in the solid phase. The optimised geometry, frequency and intensity of the vibrational bands of 2ABP were obtained by the density functional theory (BLYP and B3LYP) methods with c…
Self-assembling peptide-based nanotubes are among the most investigated bioactive compounds as a result of their numerous potential applications as novel biomaterials. To support rational bottom-up design of such artificial nanosystems, here we investigate structural and energetic properties of various sheet-derived n…
The crystal and molecular structure of phenol-2,4-disulfonic acid dihydrate was determined by X-ray structure analysis. All hydrogen positions in the crystal structure were found using difference Fourier syntheses. Oxonium cations and acid anions were linked in the crystal structure by short H-bonds, and the phenol OH…
The dielectric properties of (1 − x)Na1/2Bi1/2TiO3-xLaMg1/2Ti1/2O3 solid solutions (0 ≤ x ≤ 0.4) were studied over the temperature range 650–1030 K by measuring the impedance spectra over the frequency range 25–106 Hz. The Curie temperature T C was determined as a function of the composition of the solid solutions. It…
All forms from hypothesized gomphonemoid-cymbelloid lineages were constructed using three-dimensional (3D) parametric equations with the same boundary intervals for all forms. To construct a theoretical morphospace, the absolute value of the Riemann sum of differences between pairs of forms in terms of surfaces in the…
The paper presents comparative kinetic modelling of nitrogen oxides (NOx) removal from flue gases by selective non-catalytic reduction process using ammonia as reducing agent. The computer code SENKIN is used in this study with the three published chemical kinetic mechanisms; Zanoelo, Kilpinen and Skreiberg. Kinetic m…
Se analizaron muestras de diatomeas epifitas de distintos taxa de macroalgas recolectadas en una zona subtropical, con el objetivo de determinar si conformaban una misma asociación y si ésta variaba temporalmente. Para ello se examinó su estructura en términos de abundancias relativas, valor biológico (IVB) de los tax…
Research and development of nanoscale luminescent and laser materials are part of the rapidly advancing nanoscience and nanotechnology. Because of unique spectroscopic properties and luminescent dynamics of f-electron states, doping luminescent rare earth ions into nano-hosts has been demonstrated as an optimistic app…
This review focuses on the preparation of Si nanoparticles by wet-chemical routes. The methods described include dispersion from porous silicon, etching and surface functionalization of Si/SiO2 powders and direct chemical reaction of Si precursors. Photoluminescence of silicon nanoparticles can be tuned to cover the w…
BACKGROUND: Nanotechnology is an emerging field that could have a significant impact on cancer diagnosis, treatment and analysis. Quantum dots represent one of the most interesting nanotechnology-based platforms, and their unique properties make them a potentially versatile tool for molecular diagnostics. OBJECTIVES:…
The residual stress in a multilayer ceramic capacitor (MLCC) has been evaluated by two‐dimensional finite element simulation in combination with X‐ray diffraction measurement. It is shown that there is a compressive in‐plane stress in the active layers of the MLCC, which increases with increases in the number of diele…