Technology

  2009 JUL 7 - (VerticalNews.com) -- According to recent research from the United States, "MD simulations of ion-organic styrene-containing polymer interactions are reviewed and compared to experiment."

  "We report results for argon ion bombardment of PS, P alpha MS and P4MS. All three polymers exhibit the formation of a similar, highly cross-linking, dehydrogenated near-surface damaged layer at steady state, but small changes in the structure of the polymer (P4MS and P alpha MS are isomers) can lead to drastic changes in the initial transient sputtering of the material," wrote J.J. Vegh and colleagues, University of California ...read more

  2009 JUL 7 - (VerticalNews.com) -- "Hydrogen is the main component of many feeding mixtures used for plasma processing. Despite this, the physics and chemistries of the parallel plate, capacitively coupled, radio frequency discharges in pure hydrogen are not yet fully understood," scientists writing in the journal Plasma Processes and Polymers report.

  "The state of the art of the modeling of this system is analyzed, including the problems posed by the electron and ion reactions, the ion heating, the chemistry of excited molecules, the non-equilibrium distributions, the surface catalytic reactions, the double frequency discharge effects. Specific points are illustrated using new results obtained by a self-consistent kinetic model developed in the last 10 years," wrote S. Longo and colleagues, University of Bari ...read more

  2009 JUL 7 - (VerticalNews.com) -- "The present paper discusses a self-consistent model of plasma and gas dynamics for atmospheric microcavities in helium. A self-consistent and time-dependant model is described and applied with emphasis on terms involved in the close coupling among charged species, neutral species and the electric field, including space charge," researchers in Kingston, Canada report.

  "The microplasmas are studied from an initial cloud until the stages of charged particle over-amplification and breakdown in small-spaces, where transients are particularly important. Both metallic and dielectric electrodes are compared in terms of spatial and temporal evolution of the plasma and gas dynamics," wrote M. Jugroot and colleagues ...read more