Materials Literature
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We have performed atomic-force-microscopy studies of the roughness and spatial and correlation properties of the surface for three typical LPCVD films of silicon: amorphous and polycrystalline films with a relatively smooth surface, as well as polycrystalline films with hemispherical grains (HSG-Si) having considerabl…
We present a design for a two-dimensional omnidirectional acoustic absorber that can achieve 98.6% absorption of acoustic waves in water, forming an effective acoustic black hole. This artificial black hole consists of an absorptive core coated with layers of periodically distributed polymer cylinders embedded in wate…
Knowledge of the electromagnetic forces at different winding topology provides a good basis for designers and researchers with which to deal with some of the demands that exist for the next generation transformers. Location of the regulating coil in transformer determines to effect of the electrodynamic forces on the…
Forming the heterojunction between two semiconductor photocatalysts is an effective method for achieving high photocatalytic activity in photocatalytic reaction. Here we have constructed the ZnGa2O4/Ga2O3 heterojunction by heating the mixture of GaOOH nanoplates and ZnO. Growing the ZnGa2O4 nanoparticles on the surfac…
New developments in growth factor and pharmaceutical control of cells for neural regenerative strategies have built a need for high throughput assays to conveniently screen these treatments in vitro before moving to more complex experiments. Towards this application, we have studied an easy and highly reproducible cul…
In this review, we present a summary of some recent experiments on topological insulators (TIs) and superconducting nanowires and films. Electron-electron interaction (EEI), weak anti-localization (WAL) and anisotropic magneto-resistance (AMR) effect found in topological insulator films by transport measurements are r…
A predictive calculation is given for the structure of edge pedestal in the H-mode plasma of the KSTAR (Korea Superconducting Tokamak Advanced Research) device using the EPED model. Particularly, the dependence of pedestal width and height on various plasma parameters is studied in detail. The two codes, ELITE and HEL…
As a magnetic core material, non grain oriented (NGO) electrical steel is mainly characterized by its magnetic properties, i.e. the specific loss, the magnetic saturation polarization, and the magnetizability, i.e. the permeability. In addition, mechanical properties, e.g. manufacturability, yield strength as well as…
A metamaterial aperture operating as a leaky waveguide with resonating metamaterial irises can sweep its operation frequency to modify its complex field pattern with no moving parts. By randomly distributing the metamaterials' resonance frequencies, we show the aperture can generate random illumination patterns well s…
Cellulose-based components constitute the bulk of the current insulation for transformers. Cellulose is an organic polymer material which combines excellent electrical properties and good mechanical performance. As a polymeric material, cellulose is very sensitive to moisture and temperature. These factors can influen…
Novel developmental prototypes of solar cells based on binary donor-acceptor systems in the form of a combination of polyaniline derivatives with fullerene-containing polymers were obtained. Current-voltage characteristics of solar cells were measured, and numerical values of parameters, including open-circuit voltage…
Inflammations are a predicament issue that leads to orthopaedic hard implants failure. Thereby, calcium phosphate platinum scaffolds possess anti-inflammatory properties, as powerful tools for successful bone regeneration. The effects of the platinum nanoparticles (PtNPs) on the scaffold's degradation and proliferatio…
This paper aims to analyse the behavior of dc corona discharge in wire-to-plane electrostatic precipitators (ESP) depending on the pressure. Current-voltage curves are analyzed particularly. Experimental results show that discharge current is strongly affected by the pressure for a given atmospheric condition. Changin…
Organic pollutants could be degraded by using bubble discharge in water with gas aeration in the discharge reactor and more plasma can be generated in the discharge process. When pulsed high voltage was applied between electrodes with gas aerated into the reactor, it showed that bubbles were broken, which meant that b…
Quenching–partitioning–tempering (Q–P–T) steels have become a new member of the family of advanced high strength steels. Previous research indicates that steels treated by the Q–P–T process exhibit better combinations of strength and elongation than those treated by traditional quenching and tempering (Q&T); this has…
Acidithiobacillus ferrooxidans strain D2 was isolated from a copper bioleaching operation in Atacama Desert, Chile. Copper is widely used as cofactor in proteins but high concentrations of copper are toxic. Cells require certain mechanisms to maintain the copper homeostasis and avoid toxic effects of high intracellula…
Rather dilute mixtures of oppositely charged polyelectrolyte and surfactant can form highly viscous solutions for an excess of polyelectrolyte charges present, with viscosities up to 4 orders of magnitude above the pure polyelectrolyte solution.These changes in macroscopic behavior should originate from changes in the…
In order to detect creep–fatigue damage before the crack initiation stage, an investigation into damage behaviour based on the electron backscattered diffraction (EBSD) method for a polycrystalline nickel base superalloy has been carried out. The average misorientation within grains increases linearly up to the initia…
Abstract Steel‐cemented WC was prepared by ball milling, cold compacting and microwave sintering with Fe powder as the matrix, WC as the hard phase and the addition of rare earth Y 2 O 3 . The results show that the interface of the WC particles and Fe matrix exhibits excellent wettability and liquidity when the microw…
Hybrid fluorescent nanoparticles (NPs) were developed on the basis of a series of chemically close polyfluorene‐based conjugated polymers and an amphiphilic polymer. NPs constructed from polyfluorene with 2,1,3‐benzothiadiazole units incorporated in the backbone of polymer chains displayed Ag + ‐sensitive fluorescence…