Materials Literature
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Ferroelectric is a great potential material as new solar cells, light driver and optical sensor because of its anomalous photovoltaic effect. Bismuth ferrite and Nd-doped barium titanate thin films were prepared via sol–gel spin-coating method in the present study. The experimental results show that substitution of Nd…
The two‐dimensional (2D) distributions of surface supersaturation of sodium chlorate crystals with and without solutal convection have been measured by means of a multidirectional interferometry (MDI) technique coupled with the principles of three‐dimensional (3D) computer tomography. When solutal convection was prese…
The rate of electroplating of steel in acidified CuSO4 solution in absence and presence of isopropanol alcohol were studied by measuring the limiting current. It found that the rate of electroplating was decreased in presence of alcohol. The rate of inhibition rang from 40% to 66% depending on the concentration of alc…
The paper presents a review of studies on the synthesis and selected properties of two types of new (bio)degradable poly(ester urethane)s with soft segments containing telechelic oligoesterdiols: atactic poly([R,S]-3-hydroxybutyrate) (a-PHB) or polylactide (PLA) and/or aliphatic-aromatic copolymer poly(1,4-butylene te…
In order to balance the compressive stress of a silicon dioxide film and compose a steady MEMS structure, a silicon-rich silicon nitride film with tensile stress is deposited by plasma enhanced chemical vapor deposition process. Accurately measuring the thermal conductivity of the film is highly desirable in order to…
The chemiluminescence (CL) performance of luminol is improved using reduced graphene oxide/gold nanoparticle (rGO–AuNP) nano-composites as catalyst. To prepare this catalyst, we propose a linker free, one-step method to in-situ synthesize rGO–AuNP nano-composites. Various measurements are utilized to characterize the…
First-principles calculations are used to investigate the mechanical and thermodynamic properties of cubic YH 2 at different pressures and temperatures. The generalized gradient approximation (GGA) with Perdew–Burke–Ernzerhof (PBE) method is used to describe the exchange–correlation energy in the present work. The cal…
Background & Objectives: Nanotechnology is one of great important part of technology. Nanoparticles can be used in different applications for industrial, medical, military and personal use. The objectives of this study were preparation of Polystyrene/ZnO nanocomposite films via a simple method and investigation of ant…
Amplitude equations are discussed as an extension of phase field models, which contain atomic resolution and allow one to describe polycrystalline structures, lattice deformations and defects. The interaction of adjacent grains, which are separated by a thin melt layer, leads to structural interactions if the grains a…
In article number 1301396 Pooi See Lee and co-workers report a stretchable silver-zinc battery embedded in an elastomer matrix. The two strips based on embedded nanowire elastic conductors represent the battery cathode (silver) and anode (zinc), which can be stretched up to 80% strain while maintaining proper function…
Titanium and its alloys are frequently used in many sectors, including the health care sector, where they outperform other materials. From the biocompatibility viewpoint, the preferred condition of these materials is ultrafine or nanostructured state. Processes based on severe plastic deformation (SPD) that are capabl…
The benefits of continuous deformation of carbon wire are considered. Ultrafine-grain structure may be produced in carbon-steel wire with different carbon contents, so as to obtain a distinctive combination of strength and plasticity. The mechanical properties created in carbon-steel wire permit its use as the core of…
Creep corrosion is the corrosion of the copper (and sometimes silver) metallization on PCBs and the creeping of the corrosion product (mostly sulfides of copper and sometimes silver) on the board surfaces which may lead to the electrically shorting of neighboring features on PCBs. The problem of creep corrosion has be…
In this paper, two different beam elements (i.e. according to the Bernoulli beam and Timoshenko beam theory) for the modeling of the behavior of carbon nanotubes are applied. Finite element models are developed for this study with variation of chirality for both zig-zag and armchair configurations of CNTs. The deforma…
ABSTRACT The radical copolymerization of chlorotrifluoroethylene (CTFE) with 3,3,4,4‐tetrafluoro‐4‐bromobut‐1‐ene (BTFB) initiated by tert ‐butylperoxypivalate is presented. The microstructures of the obtained copolymers are determined by means of NMR spectroscopies and elemental analysis and show that random copolyme…
Research results of ion - initiated etching processes of polymer films based on polyimide in oxygen plasma, sulfur hexafluoride and oxygen-argon mixtures of low pressure (around 10-12 Pa) have been shown. Operating modes of deep plasma chemical polyimide etching have been established using IDP TM RHS 100 installation.…
The method of magnetic adaptive testing (MAT) was applied for the investigation of flake graphite cast iron samples having various metallic matrix and graphite structures. MAT is typical by its low required magnetization of samples, because it is based on the measurement of families of minor magnetic hysteresis loops.…
A Novel symmetric mixed finite element is introduced for the accurate modal analysis of optical waveguides and photonic devices. In addition to the advantages of conventional curl conforming mixed finite elements, the proposed element is symmetric and hierarchical. Symmetry ensures that the solution accuracy is not de…
The paper presents the results of complex research on microstructural peculiarities of copper and mechanisms of its hardening after mechanical activation in planetary ball mills, high-pressure torsion, and combined treatment which includes mechanical activation and subsequent consolidation under high-pressure torsion…
Compounds The perovskites are materials with physical and chemical characteristics that make them optimal for application in the technological and scientist. When the ideal formula of perovskite ABO 3 is modified by introducing a special structural arrangement can get to get triple perovskites, which correspond to the…