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Optical radiation efficiency is the ratio of scattering cross section to extinction cross section. Optical radiation efficiency has been calculated, using classical electrostatics, for spherical nanoparticles of Ag, Au, Cu, Co, Cr, Ni, Pd, Pt, Sn, and Ti. The particle diameter was varied and calculated for the wavelengths in the range of 400–1200nm. The change in radiation efficiency in glass medium...
The main purpose of our research is focused to increase anodic catalysts activity and thus to decrease noble metal loading in anodes for electrooxidation of methanol. Binary and ternary catalysts dispersed in chitosan, Pt–Ni, Pt–Sn and Pt–Ni–Sn are synthesized by reduction of appropriate metal salts with NaBH 4 in the chitosan solution. UV–vis spectra and transmission electron microscopy (TEM)...
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...
In this article, the effects of Ni nanoparticles addition on shear property and microstructure of Sn-3.5Ag Lead-free solder joint was studied. The nickel nano-composite Sn-3.5Ag solder was prepared by adding dispersant to the dry nanoparticles and mechanically stirred Ni nanoparticles into the Sn-3.5Ag Lead-free solder paste. The shear force of the Sn-3.5Ag solder, 0.5 and 1.0 wt% nickel nano-composite...
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...
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