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A wide array of research has been conducted in the processing of nanocomposites, thus, designing and fabricating new nanocomposites for enhancing electrical and magnetic products have always been challenges. In this paper, it has been studied the prediction of effective permeability of new nanocomposites magnetic materials based on theoretical approaches at terahertz frequencies to exhibit weak electric...
Polycrystalline Si (poly-Si) thin-film is widely used in optical MEMS/NEMS devices. However, the device performance depends on the crystallized structure in the poly-Si thin-film. We performed metal-induced lateral crystallization (MILC) to design the positions of grain boundaries in the poly-Si thin-film. Thin-film cantilever resonators were fabricated to discuss how grain boundaries affect the oscillation...
It has been found that metal nanopowders produced by wire electrical explosion have stored energy, which is higher than the standard heat of melting. Continuing studies on stored energy the influence of electrons flow (accelerator ELU-4) on iron and nickel nanopowders has been investigated in the paper. It was found that the thermal effect of oxidation for iron nanopowders after exposure increased...
A novel method to construct a sensitive amperometric sensor for hydrogen peroxide (H2O2) is described. It is composed of highly dispersed palladium nanoparticles on a vertically aligned nickel-coated silicon micro-channel plate (MCP). The morphology of the Pd/Ni/Si-MCP electrode is characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrode with a three-dimensional...
Wide bandgap materials have become very attractive for power electronics due to their physical properties that allow junction temperatures up to a theoretical limit of 600°C. In contrast, the maximum operation temperature of conventional silicon semiconductors is limited to approximately 200°C. The high-temperature operation of wide bandgap switches allows an increasing power density of power converters...
This work presents a novel and low-cost printing technique to construct a three-layer (Pd/Ni/Cu) structure as front side conductor of textured mono-crystalline silicon solar cells. The technique involves microcontact printing and electrochemical deposition. Electrochemical deposition including electroless Ni and electroplated Cu offers an inexpensive method in contrast to the conventional silver-paste...
Bulk nanostructured (Bi,Sb)2Te3 compounds and GeTe based amorphous/nanocrystal composites have been successfully fabricated by the combined hydrothermal/hot-pressing and quenching/annealing methods, respectively. The (Bi,Sb)2Te3 nanopowders synthesized by hydrothermal method exhibit a hollow-like structure. After hot-pressing, the nanoscale grains varying from tens to hundreds of nanometers were found...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
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