Electron spectroscopic study of the interaction of oxygen with Co(110) and of coadsorption with water

Grellner, F.; Klingenberg, B.; Borgmann, D.; Wedler, G.

doi:10.1016/0368-2048(94)02261-5

Cited by 38 publications

(14 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the literature, the O 1s XPS spectrum of Co or Co-based alloy surfaces has been deconvoluted into three components: O 1s (1) was assigned to metal oxide (O 2À ) species. A single ($530.1 eV) [61,62] or two different positions ($529.5 eV and $530.5 eV) [63,64] have been observed for this component. The oxygen in the non-stoichiometric environment has larger BE than oxygen in the stoichiometric environment [63].…”

Section: Formation and Characterization Of Ots Sam On Co-cr Alloymentioning

confidence: 92%

“…The oxygen in the non-stoichiometric environment has larger BE than oxygen in the stoichiometric environment [63]. The peaks of the components O 1s (2) and O 1s (3) were observed between 531.0 and 531.8 eV, and between 532.5 and 533.9 eV, respectively; O 1 s (2) was assigned to hydroxide (OH À ) species, and O 1s (3) was assigned to H 2 O species [61][62][63][64]. Fig.…”

Section: Formation and Characterization Of Ots Sam On Co-cr Alloymentioning

confidence: 98%

See 1 more Smart Citation

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Mani

Feldman

et al. 2009

Applied Surface Science

View full text Add to dashboard Cite

Section: Formation and Characterization Of Ots Sam On Co-cr Alloymentioning

confidence: 92%

Section: Formation and Characterization Of Ots Sam On Co-cr Alloymentioning

confidence: 98%

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Mani

Feldman

et al. 2009

Applied Surface Science

View full text Add to dashboard Cite

“…1 ML of Pd adsorbed on Nb͑001͒ exhibits energetically deep lying emissions like the noble-metal Cu, 55 whereas thicker Pd films display only a strong UPS peak just below the Fermi level like the ferromagnetic metals Ni ͑Ref. 56͒ and Co. 33,[57][58][59][60] The aim of this work is to determine the properties of the Pd layers exhibiting the unusual UPS emissions, i.e., of 1 ML Pd deposited on Nb͑001͒ and of thick Pd films grown on this substrate. To this end their geometric and electronic structure will be determined using electron diffraction and electron spectroscopy measurements.…”

Section: Resultsmentioning

confidence: 99%

“…A ͑1120͒-oriented bulk sample of Co also shows in UPS only an emission near the Fermi energy. [58][59][60] Similarly, a strong UPS emission at the Fermi edge is characteristic of ͑1120͒-oriented Ni films. 56,77 It should be pointed out, however, that the same crystal structure does not necessarily lead to the same UPS emissions.…”

Section: Arups From Hcp Pd Films In Comparison To Ups From Co and Ni mentioning

confidence: 94%

Pd bonded on Nb(001): Dependence of noble metal and ferromagnetic characteristics on film thickness

Hüger

Osuch

2005

Phys. Rev. B

View full text Add to dashboard Cite

Experimental observations confirmed by density functional theory ͑DFT͒ calculations show that strong epitaxial bonds between Pd atoms and the substrate can induce two competing properties: nobleness and ferromagnetic order in the same material, i.e., Pd bonded on Nb͑100͒. Angle-resolved ultraviolet photoelectron spectroscopy measurements, confirmed by first principles, self-consistent DFT calculations show that the strong, direct bonds between a Pd monolayer and Nb͑001͒ push the d-band center of the monolayer toward lower binding energies, which results in the Pd reactivity comparable to that of the noble metal Ag. The strong epitaxial constraint of the Nb͑001͒ substrate induces a ͑1120͒-oriented hexagonal close-packed structure in thicker Pd films. First principles, self-consistent DFT calculations with spin-orbit coupling included performed at 0 K show that Pd in this structure is ferromagnetically ordered at the optimum lattice constant. Its bands at the Fermi level are flatter in comparison to those of Pd in its natural, nonmagnetic, face-centered-cubic structure, leading to the density of states ͑DOS͒ at the Fermi level which fulfills the Stoner criterion for ferromagnetism. We identify these bands in the bulk band structure and probe them with angle-resolved ultraviolet photoelectron spectroscopy in ͑1120͒-oriented hexagonal close-packed Pd films.

show abstract

“…This behaviour was attributed to dominant chemisorption in the initial phase of oxygen interaction, followed by oxygen incorporation into the Co lattice. 6 In saturation, the work function is still ¾1 eV larger than expected for bulk-like CoO films. 4,10 During CO exposure the initial work function increase is 0.55 eV, saturating at 3 L. For CO 2 the work function increases by 0.87 eV and saturates at 30 L.…”

Section: 30mentioning

confidence: 90%

Interaction of O₂, CO and CO₂ with Co films

Frerichs

Schweiger

Voigts

et al. 2005

Surface & Interface Analysis

View full text Add to dashboard Cite

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.

show abstract

Electron spectroscopic study of the interaction of oxygen with Co(110) and of coadsorption with water

Cited by 38 publications

References 32 publications

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Pd bonded on Nb(001): Dependence of noble metal and ferromagnetic characteristics on film thickness

Interaction of O₂, CO and CO₂ with Co films

Contact Info

Product

Resources

About

Electron spectroscopic study of the interaction of oxygen with Co(110) and of coadsorption with water

Cited by 38 publications

References 32 publications

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes

Pd bonded on Nb(001): Dependence of noble metal and ferromagnetic characteristics on film thickness

Interaction of O2, CO and CO2 with Co films

Contact Info

Product

Resources

About

Interaction of O₂, CO and CO₂ with Co films