Initial Sticking Rate of O2 Molecular Beams on Ni (111) Surface Depending on Kinetic Energy

Conference paper
First Online:
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 32)

Abstract

Space structures in a low Earth orbit collide with gaseous atoms and molecules with a relative kinetic energy of several electron volts. The action of high speed reactive atoms and molecules accelerates the degradation of material surfaces. In this study, the oxidation states of Ni (111) surfaces that were prepared by irradiation with supersonic O2 molecular beams were analyzed by soft x-ray photoemission spectroscopy with synchrotron radiation. An oxygen uptake curve and an initial sticking rate were remarkably changed depending on the O2 incident energy. An intermediate plateau shown in an oxygen uptake curve disappeared with increasing incident energy due to the change of dissociative adsorption mechanism from a two-dimensional island growth model to a direct activated adsorption model.

Keywords

Ni(111) Oxygen Photoemission spectroscopy Supersonic molecular beam Synchrotron radiation 
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Notes

Acknowledgments

A part of this work was supported by the Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) (20360024). The synchrotron radiation experiments were performed at the BL23SU in the Spring-8 facilities with the approval of the Japan Synchrotron Radiation research Institute (JASRI) (Proposal No.2011A3802, No.2010B3802, No.2010A3802, No.2008B3803, No.2008A3803, No.2007A3801, No.2006B3802).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Graduate School of Material ScienceUniversity of HyogoHyogoJapan
  2. 2.Japan Atomic Energy Agency (JAEA)HyogoJapan

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