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Energy dependent reactions of 3–300 eV C+, O+and CO+ions with a Ni(111) surface

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms
Publication Date
DOI: 10.1016/0168-583x(88)90602-7
  • Chemistry
  • Physics


Abstract Interactions of energy and mass selected C +, O +, and CO + ions with a clean Ni(111) surface are studied as a function of kinetic energy ( E k) for a range of chemically important energies (3–300 eV). Reactions of C + and O + with Ni(111) yield nickel carbides and oxides, respectively. These reactions are efficient at low E k and the reaction probability decreases with increasing E k until implantation of ions into the Ni solid becomes significant. In the reaction of CO + with Ni(111), molecular CO addition on the surface favors the low energy product channel, while collisional dissociation of CO +, which results in formation of surface nickel carbide and nickel oxide species, increases with E k. Depth profile studies of the reacted surfaces indicate that implantation of C + into subsurface Ni layers is more facile than implantation of O + in the high energy portion of the range investigated.

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