We present a study of the photon- and electron-stimulated desorption of cations from yttria-stabilized cubic ZrO2(100) and undoped amorphous ZrO2 surfaces. For botyh types of zirconia, O+ is the primary desorption product. O+ has a desorption threshold of ~30 eV and a kinetic energy distribution that extends from zero to ~7 eV and peaks at ~2 eV. A comparison of the ion threshold data with photoelectron spectra collected fromt he same surfaces indicates that ionization of the Zr(4p) core level initiates O+ desorption. All of the evidence is consistent with the Knotek-Feibelman desorption mechanism, in which the O+ ions are produced and ejected fromt he surface via a multi-electron Auger decay process.
Revised: October 4, 1999 |
Published: June 30, 1999
Citation
Simpson W.C., W.K. Wang, W.K. Wang, J.A. Yarmoff, J.A. Yarmoff, and T.M. Orlando. 1999.Photon-and Electron-Stimulated Desorption of O+ from Zirconia.Surface Science 423.PNNL-SA-30246.