Planar polycyclic aromatic hydrocarbons (PAHs) are candidates for the diffuse interstellar band (DIB) carriers. Nanometer-size Fe metallic particles, expected to be present during astrophysical graphite growth, are catalytic for formation of a related species—large tubular PAH molecules. We propose that tubular PAH molecules are a component of the interstellar medium. Electronic structure calcu...

This research aim to optimize two kinds of cathode material, LNCA and lithium manganese rich materials (LNMC), which are potential cathodes of EV since their high theoretical specific capacity. However several drawbacks need to be improved such as their low cycling performance, unstable structure, and fast voltage fading. In this project doping other ions (Na, K, Al, Sn) replacing Ni and Mn ion...

Photoelectric charging measurements are presented of dust grains in vacuum for isolated grains and for grains near a photoemissive surface. Isolated grains reach a positive-equilibrium floating potential, dependent upon the work function of the particle, which causes the emitted electrons to be returned. Grains dropped past a photoemitting surface reach a negative floating potential for which t...

Shielding calculations are done for the following scenario: a graphite target is hit by a 1 GeV/u U beam with an intensity of 10 particles per second. The target is a wheel with radius of 22.5 cm and it is subdivided into three rings, each 16 mm wide, with thicknesses of 21.6, 32.4 and 43.2 mm, corresponding to 4, 6, 8 g/cm [3]. For a conservative case the thickest part of the target with a thi...

Boron doped graphite nano particles were used as functioning elements for creation of electrodes for the detection of uric acid in biological samples. The electrode obtained in this manner was capable of oxidizing ascorbic acid at lower potentials. This provided a desirable solution to the interfering problem encountered in the detection of uric acid in biological samples caused by ascorbic aci...

In this study, powder technology was used to obtain Fe-SiC composites in which SiC particles act as precursors generate a large amount of turbostratic graphite dispersed the composite matrix. The selection alloy composition studied employing Thermo-Calc® software temperature and range for stabilization phase iron with high yield. extracted 2D were mineral oil order evaluate potential these lubr...

Hybrid propulsion, consisting of solid fuel and liquid oxidizer, exhibits major advantage regarding safety, development costs, energetic performance, controllability. Hence, it has been considered for space other propulsion programs. One the characteristic features hybrid motors, that may be disadvantage, is their relatively low thrust due to regression rate typical polymeric fuels. This resear...