Study of NiO/Ni(100) structural changes under the influence of ion irradiation at different temperatures

Kubiak, R. A. A.; Morgner, Harald; Rakhovskaya, O.V.

doi:10.1016/0039-6028(94)90188-0

Cited by 28 publications

(30 citation statements)

References 17 publications

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“…Figure 1 illustrates that once oxygen has been adsorbed it causes a marked reduction of the signal located at 16 eV and a slight increase of the work function (C0.3 eV). The spectrum is still dominated by the RI C AN process, which is in agreement with spectra previously published by Morgner et al 11,13 In our series of experiments, we also studied the surface work function by exposing Ni to 5-300 L of oxygen at 600 K (not shown). The surface work function reached a maximum of C0.6 eV for <10 L and decreased continuously down to 0.2 eV.…”

Section: Resultssupporting

confidence: 86%

Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Lescop¹,

Fanjoux²,

Galtayries³

et al. 2002

Surface & Interface Analysis

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The aim of the present study was to investigate the reaction between ammonia and pre-adsorbed oxygen on Ni at 600 K using metastable impact electron spectroscopy (MIES) and UPS techniques. For a given oxygen-pretreated nickel surface, the changes in the MIES spectra along with ammonia adsorption can be decomposed into three different steps: a first domain without significant changes, a second domain corresponding to drastic changes in the intensity of a signal at 15.8 eV; and a third domain where no more change is detected. The first domain may correspond to the ammonia chemisorption on the surface, whereas the changes in the second domain would be attributed to surface dehydroxylation. The existence of NH x groups on the surface has been detected by UPS; they result from ammonia chemisorption. The changes in the MIES spectra have also been studied versus the initial oxygen uptake on Ni. It emerged that the first domain is larger with increasing initial oxygen exposure: this may be explained by the poorer surface reactivity of NiO, contrary to the oxygen-adsorbed phase.

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Section: Resultssupporting

confidence: 86%

Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Lescop¹,

Fanjoux²,

Galtayries³

et al. 2002

Surface & Interface Analysis

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“…A very similar tendency has been observed in the MAES spectra during initial oxidation of Ni(1 0 0) [25]. The difference in the total emission yield gives rise to the contrast of the MEEM image.…”

Section: Maes and Meemsupporting

confidence: 72%

“…The oxidation of Ni is regarded as a typical surface reaction, and it has been extensively studied using several methods that include low energy electron diffraction (LEED) [17][18][19][20], Auger electron spectroscopy (AES) [17,18], photoemission spectroscopy (XPS and UPS) [21][22][23], metastable-atom electron spectroscopy (MAES) [24,25], high resolution electron energy loss spectroscopy (HREELS) [23,26,27], and scanning tunneling microscopy (STM) [28,29], etc. According to the standard model proposed by Holloway and Hudson [17], the oxidation at 300 K proceeds in three steps: chemisorption, nucleation and lateral growth of oxide, and in-depth growth of oxide (see Section 4 for details).…”

Section: Introductionmentioning

confidence: 99%

Mesoscopic pattern formation during initial oxidation of Ni(111) observed by electron emission microscopy

et al. 2008

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“…20,24 Both spectra display a close similarity to those for CoO (Fig. 3) and NiO 22 (featuring five structures denoted by (1)- (5) in Refs 20 and 24). The main characteristics of the spectra can be summarized as follows: as in the present results, the Co 3d-derived bands (A and B in our notation) are strongly suppressed in MIES relative to the O 2p-derived structures C and D. Also, as in the present MIES results, peak E appears considerably enhanced compared to that in UPS.…”

Section: Interaction Of Co With Omentioning

confidence: 50%

Interaction of O₂, CO and CO₂ with Co films

Frerichs

Schweiger

Voigts

et al. 2005

Surface & Interface Analysis

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Metastable impact electron spectroscopy (MIES), ultraviolet photoelectron spectroscopy (UPS(HeI)) and x-ray photoelectron spectroscopy (XPS) were applied to study the interaction of O 2 , CO and CO 2 with Co films at room temperature. The films were produced on Si(100) surfaces under the in situ control of MIES, UPS and scanning tunnelling microscopy (STM). For O 2 , dissociative adsorption takes place initially and then incorporation of oxygen starts at exposures of ∼5 L. Comparison of the MIES and UPS spectra with those published for CoO shows that near-stoichiometric CoO films can be obtained by co-deposition of Co and O 2 . The CO is adsorbed molecularly up to a maximum coverage of ∼0.6 monolayer, with the C-end pointing towards the surface. The CO 2 adsorption is dissociative, resulting in the formation of Co-CO bonds at the surface. The resulting oxygen atoms are mostly incorporated into the Co layer. For all studied molecules the interaction with Co is similar to that with Ni.

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Study of NiO/Ni(100) structural changes under the influence of ion irradiation at different temperatures

Cited by 28 publications

References 17 publications

Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Mesoscopic pattern formation during initial oxidation of Ni(111) observed by electron emission microscopy

Interaction of O₂, CO and CO₂ with Co films

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Study of NiO/Ni(100) structural changes under the influence of ion irradiation at different temperatures

Cited by 28 publications

References 17 publications

Interaction of NH3 with oxygen‐pretreated Ni at 600 K

Interaction of NH3 with oxygen‐pretreated Ni at 600 K

Mesoscopic pattern formation during initial oxidation of Ni(111) observed by electron emission microscopy

Interaction of O2, CO and CO2 with Co films

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Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Interaction of NH₃ with oxygen‐pretreated Ni at 600 K

Interaction of O₂, CO and CO₂ with Co films