in this paper, the effect of size on melting temperature of metallic nanoparticles (au, pb and bi) is theoretically simulated and explained. in this regard, the cause of difference in various experimental data is introduced, which is the difference between nanoparticles’ grain gaussian distribution. this volume-depended model with the help of the gaussian distribution can describe the relation ...

Abstract Ultra-compact transverse magnetic (TM)-pass polarizer based on silicon sapphire (SOS) platform is proposed and analysed. Low power consumption, high linearity speed of transmission are the major advantages SOS in different commercial applications especially mid infrared region.The suggested structure has bimetallic configuration aluminium doped zinc oxide (AZO) zirconium nitride (ZrN) ...

The throughput of the injection molding process is restricted by cooling time each cycle which accounts for three-fourths time. Manufacturing molds out copper or alloys can reduce because their high thermal conductivity, but mold life reduced has much lower hardness and strength than traditional materials such as steels. By layering steel onto using directed energy deposition, advantages both b...

Topological insulators are a unique class of materials characterized by a Dirac cone state of helical Dirac fermions in the middle of a bulk gap. When the thickness of a three-dimensional topological insulator is reduced, however, the interaction between opposing surface states opens a gap that removes the helical Dirac cone, converting the material back to a normal system of ordinary fermions....

Glycerol is a byproduct of biodiesel production and, as such, it limited economic value. By means electrooxidation, glycerol can be used feedstock for scalable hydrogen production, in addition to conversion value-added products. The development novel and efficient catalytic electrode materials the anodic side reaction key towards hydrogen-based energy economy. In present study, computational sc...

the series of mono-metallic and bi-metallic catalysts have been prepared by impregnatingwith solutions containing compound of h2ptc15,nbc15 and lml hc1 (0.1 mol). the activityand selectivity of the catalysts have been determined under conditions at 450-500°c, 15-30atm. molar ratio h2/c7h16=5 and vvh=1.5/h for converting n-heptane. under theseexperimental conditions it has been established that ...

Objectives • Elucidate rates and mechanisms of the degradation of polymer electrolyte fuel cell (PEFC) platinum electrode performance – Effect of electrolyte, potential (holding and cycling), time, and temperature • Develop non-platinum cathode electrocatalysts for PEFCs – Transition metal carbides and nitrides – Bi-metallic systems – Metal centers attached to electron-conducting polymer backbones

X-ray absorption spectra (XAS) were collected and analyzed to characterize bismuth (Bi) environments in borosilicate glass formulations developed for the immobilization of high level nuclear wastes (HLW), from the bismuth phosphate process. Therefore, the structural role of Bi in these glasses is of interest; in addition in the present study, more particular interest in Bi originated from unusu...

A novel strategy for the stitching of a tripodal ligand into a bi-metallic two-dimensional (2D) coordination polymer has been reported. The reaction of 5-nitrosalicylaldehyde based ligand H3L with nickel acetate resulted in the metal functionalized 2D extended network via potassium induced activation of the nitro group of the ligand. The compound is highly active towards photo-degradation of or...