Scattering state‐selected NO+on GaAs(110): The effect of translational and vibrational energy on NO−and O−product formation

Reactive collisions of hyperthermal energy molecular ions with solid surfaces

Recent experimental advances have uncovered many of the diverse reaction pathways following an energetic collision between a molecular ion and a solid surface. Hyperthermal translational energies (5-500 eV) are sufficient to activate a number of chemical transformations in the near-surface region, including charge transfer, dissociation, abstraction, and deposition. State-of-the-art scattering studies probe the consumption and disposal of energy and the effects of approach geometry and surface electronic structure on the operative reaction mechanisms. These fundamental investigations provide insight relevant to the fabrication of microelectronics devices, the interaction of space vehicles with the earth's atmosphere, and the development of analytical techniques in mass spectrometry.

Atom abstraction in the scattering of state-selected NO+(X1Sigma(+)) on O/Al(111)

The reactive scattering of state-selected NO+(X1Sigma(+)) on oxygen-covered Al(111) is explored at hyperthermal collision energies. Relative ion yields and mean translational energies of scattered NO-2 are presented as a function of oxygen exposure and NO+ collision energy. Above the 9+/-1 eV threshold for reaction, NO-2 products emerge with an average kinetic energy that depends linearly on incident NO+ energy. The formation of NO-2 is assigned to the direct, Eley-Rideal abstraction of an adsorbed O atom by an incident NO molecule.