Oxygen adsorption and oxide formation on Co(112̄0)

Growth and characterization of thin epitaxial Co3O4(1Vaz1, Henrich2, Ahn3 et al. 2009Journal of Crystal Growth32150View full textAdd to dashboardCite

“…The O 1s photoemission line is also similar before and after annealing. The additional shoulder observed at higher binding energies has been attributed to adsorbed oxygen [13,51,[57][58][59][60][61][62] or to surface hydroxylation [13,52]; for the annealed sample the shoulder is much more pronounced compared to the as-grown film, consistent with surface hydroxylation through water adsorption upon exposure to air. The surface morphology was also probed ex situ using AFM in contact mode at room temperature.…”

Observation of the satellite signal in Co2pphotoemission spectra: Evidence of a localized electronic structure in thin films

“…11 17 Before going into a detailed discussion, it is necessary to distinguish the satellite from other peaks, such as the chemical shift peak of CoO. 23 In Fig. 3 we show some fitting results for Co 2p, where some convoluted spectra of Co and CoO are shown together with spectra for 1-ML Co on O/Cu, and CoO/Co.…”

Interaction of O2, CO and CO2 with Co films

“…The same techniques were utilized to monitor the quality of the Co films. The HeI spectra (see bottom spectra in Figs 2, 4 and 5) are very similar to Co 1120 , 4 Co(0001) 5 and Co/Si(111); 15 in particular, they show no signs of emission from the Si substrate. Typical film thicknesses employed in this work are of the order of 1.4 nm, as estimated by XPS from attenuation of the Si 2s/Si 2p peaks during Co exposure.…”