Interaction between nitrogen plasma and tungsten

Interaction between Plasma and Low - κ Dielectric

Interaction between Nitrogen and Phosphate Stress Responses in Sinorhizobium meliloti

Bacteria have developed various stress response pathways to improve their assimilation and allocation of limited nutrients, such as nitrogen and phosphate. While both the nitrogen stress response (NSR) and phosphate stress response (PSR) have been studied individually, there are few experiments reported that characterize effects of multiple stresses on one or more pathways in Sinorhizobium meli...

Chemical nitrogen fixation by using molybdenum and tungsten complexes*

Dinitrogen complex cis-[W(N2)2(PMe2Ph)4] reacts with an excess of acidic dihydrogen complexes such as trans-[RuCl(η-H2)(dppe)2]BF4 (dppe = 1, 2-bis(diphenylphosphino)ethane) at 55 °C under 1 atm of H2 to form ammonia in moderate yield. The reaction is presumed to proceed through nucleophilic attack of the remote nitrogen of the coordinated dinitrogen on the dihydrogen ligand. The coordinated di...

Reaction of tungsten anion clusters with molecular and atomic nitrogen

Ultraviolet photoelectron spectra for WnN2 2 (n51 – 8) clusters produced by addition of atomic and molecular nitrogen on W anion clusters are presented. Evidence is provided that molecular chemisorption of N2 is more stable than the dissociative one on tungsten anion clusters consisting of eight atoms or less, which is completely different from the results on tungsten bulk surfaces. A general t...

X-ray microtomography of heavy microstructures: the case of Plasma-Sprayed Tungsten and Tungsten/Steel MMC

In this paper X-ray microtomography on Plasma Sprayed Tungsten (PS-W) deposited on ferritic-martensitic steel is presented and discussed. PS-W is a challenging material for microtomography since it exhibits a random porous network at different length-scales and it is hardly penetrable by X-rays. Results are presented by application of monochromatic synchrotron light at beamline ID-19 of the ESR...