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Graphene on ferromagnetic surfaces and its functionalization with water and ammonia.

Böttcher S, Weser M, Dedkov YS, Horn K, Voloshina EN, Paulus B - Nanoscale Res Lett (2011)

Bottom Line: In this article, an angle-resolved photoelectron spectroscopy (ARPES), X-ray absorption spectroscopy (XAS), and density-functional theory (DFT) investigations of water and ammonia adsorption on graphene/Ni(111) are presented.ARPES and XAS data of the H2O (NH3)/graphene/Ni(111) system give an information regarding the kind of interaction between the adsorbed molecules and the graphene on Ni(111).The presented experimental data are compared with the results obtained in the framework of the DFT approach.

View Article: PubMed Central - HTML - PubMed

Affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany. dedkov@fhi-berlin.mpg.de.

ABSTRACT
In this article, an angle-resolved photoelectron spectroscopy (ARPES), X-ray absorption spectroscopy (XAS), and density-functional theory (DFT) investigations of water and ammonia adsorption on graphene/Ni(111) are presented. The results of adsorption on graphene/Ni(111) obtained in this study reveal the existence of interface states, originating from the strong hybridization of the graphene π and spin-polarized Ni 3d valence band states. ARPES and XAS data of the H2O (NH3)/graphene/Ni(111) system give an information regarding the kind of interaction between the adsorbed molecules and the graphene on Ni(111). The presented experimental data are compared with the results obtained in the framework of the DFT approach.

No MeSH data available.


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XAS studies of water and ammonia adsorption on grapheme. Angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of one-half of the ML of (b) H2O and (c) NH3, respectively.
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Figure 3: XAS studies of water and ammonia adsorption on grapheme. Angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of one-half of the ML of (b) H2O and (c) NH3, respectively.

Mentions: The effects of the possible orbital mixing of the valence band states of the graphene layer on Ni(111) and orbitals of water and ammonia molecules were studied by XAS (Figure 3). This figure shows the angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of 1/2 of the ML of (b) H2O and (c) NH3, respectively.


Graphene on ferromagnetic surfaces and its functionalization with water and ammonia.

Böttcher S, Weser M, Dedkov YS, Horn K, Voloshina EN, Paulus B - Nanoscale Res Lett (2011)

XAS studies of water and ammonia adsorption on grapheme. Angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of one-half of the ML of (b) H2O and (c) NH3, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211271&req=5

Figure 3: XAS studies of water and ammonia adsorption on grapheme. Angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of one-half of the ML of (b) H2O and (c) NH3, respectively.
Mentions: The effects of the possible orbital mixing of the valence band states of the graphene layer on Ni(111) and orbitals of water and ammonia molecules were studied by XAS (Figure 3). This figure shows the angular dependence of the C K-edge XAS spectra of (a) graphene/Ni(111) and this system after adsorption of 1/2 of the ML of (b) H2O and (c) NH3, respectively.

Bottom Line: In this article, an angle-resolved photoelectron spectroscopy (ARPES), X-ray absorption spectroscopy (XAS), and density-functional theory (DFT) investigations of water and ammonia adsorption on graphene/Ni(111) are presented.ARPES and XAS data of the H2O (NH3)/graphene/Ni(111) system give an information regarding the kind of interaction between the adsorbed molecules and the graphene on Ni(111).The presented experimental data are compared with the results obtained in the framework of the DFT approach.

View Article: PubMed Central - HTML - PubMed

Affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany. dedkov@fhi-berlin.mpg.de.

ABSTRACT
In this article, an angle-resolved photoelectron spectroscopy (ARPES), X-ray absorption spectroscopy (XAS), and density-functional theory (DFT) investigations of water and ammonia adsorption on graphene/Ni(111) are presented. The results of adsorption on graphene/Ni(111) obtained in this study reveal the existence of interface states, originating from the strong hybridization of the graphene π and spin-polarized Ni 3d valence band states. ARPES and XAS data of the H2O (NH3)/graphene/Ni(111) system give an information regarding the kind of interaction between the adsorbed molecules and the graphene on Ni(111). The presented experimental data are compared with the results obtained in the framework of the DFT approach.

No MeSH data available.


Related in: MedlinePlus