A comparative study of anti-resonance effects in InSe and InSe doped with GaS, using the resonant Raman spectroscopy is presented. The nonpolar optical phonon of  symmetry in InSe exhibits a pronounced decrease in the Raman cross-section at excitation energy 2.585 eV. In InSe doped with GaS samples, it is found that the anti-resonance behavior decreases as doping contents are increased. To acco...

The feasibility of using transition metal fragments to stabilize B2H4 in planar configuration by donating 2 electrons to the boron moiety is investigated. Building upon the existing theoretical and experimental data and aided by the isolobal analogy, the model transition metal complexes Cr(CO)4B2H4 (6), Mn(CO)CpB2H4 (7), Fe(CO)3B2H4 (8) and CoCpB2H4 (9) are chosen to illustrate this unique bond...

Excited-state chemistry is usually ascribed to photo-induced processes, such as fluorescence, phosphorescence, and photochemistry, or to bio- and chemiluminescence, in which light emission originates from a chemical reaction. A third class of excited-state chemistry is, however, possible. It corresponds to the photochemical phenomena produced by chemienergizing certain chemical groups without l...

A lower vacuum housing (34) of a sensor dewar (26) is fabricated in a single brazing operation from ceramic and metallic components. The components are assembled with ceramic-to-metal interfaces and metal-to-metal interfaces. Brazing is accomplished by active brazing of the ceramic­ to-metal interfaces and non-active brazing of the metal-to­ metal interfaces. Specific combinations of active bra...

In order to search high-capacity hydrogen storage media, first-principles calculations were performed. Ca-decorated on perfect and defective C3N nanotube as a new adsorbent for H2 molecules were studied. It was found that the Ca-decorated on defective nanotube can adsorb up to eight H2 molecules with the average binding energy of 0.11 eV/H2. Interaction of Ca atom with the nanotubes and H2 mole...

Abstract A controller for filling and maintaining the level of liquid nitrogen Dewars is described, which has been used in experiments where the boil-off rate is large due to the proximity of an atomic beam oven to a beam dump cooled by the liquid nitrogen. The control system uses either a pair of copper–constantan thermocouples, or a pair of green LEDs to monitor the upper and lower levels of ...