Topic
XANES
About: XANES is a research topic. Over the lifetime, 7737 publications have been published within this topic receiving 188032 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: Comparison of the experimental CK edge spectrum with theoretical spectra plotted for C(2)F models reveals that fluorine atoms are more likely to form chains, which agrees with the atomic force microscopy observation of a chain-like pattern on the surface of graphite fluoride layers.
Abstract: Highly oriented pyrolytic graphite characterized by a low misorientation of crystallites is fluorinated using a gaseous mixture of BrF3 with Br2 at room temperature. The golden-colored product, easily delaminating into micrometer-size transparent flakes, is an intercalation compound where Br2 molecules are hosted between fluorinated graphene layers of approximate C2F composition. To unravel the chemical bonding in semifluorinated graphite, we apply angle-resolved near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and quantum-chemical modeling. The strong angular dependence of the CK and FK edge NEXAFS spectra on the incident radiation indicates that room-temperature-produced graphite fluoride is a highly anisotropic material, where half of the carbon atoms are covalently bonded with fluorine, while the rest of the carbon atoms preserve π electrons. Comparison of the experimental CK edge spectrum with theoretical spectra plotted for C2F models reveals that fluorine atoms are more likely to for...
61 citations
TL;DR: In this paper, the pre-edge in oxygen near-edge x-ray absorption fine structure spectra of single step, gas phase synthesized titanium oxynitride photocatalysts with 20 nm particle size was examined.
Abstract: Close inspection of the pre-edge in oxygen near-edge x-ray absorption fine structure spectra of single step, gas phase synthesized titanium oxynitride photocatalysts with 20 nm particle size reveals an additional eg resonance in the VB that went unnoticed in previous TiO2 anion doping studies. The relative spectral weight of this Ti(3d)-O(2p) hybridized state with respect to and located between the readily established t2g and eg resonances scales qualitatively with the photocatalytic decomposition power, suggesting that this extra resonance bears co-responsibility for the photocatalytic performance of titanium oxynitrides at visible light wavelengths.
61 citations
TL;DR: In this article, the pre-edge in oxygen near-edge X-ray absorption fine structure spectra of single-step, gas-phase-synthesized titanium oxynitride photocatalysts with 20 nm particle size was examined.
Abstract: Close inspection of the pre-edge in oxygen near-edge X-ray absorption fine structure spectra of single-step, gas-phase-synthesized titanium oxynitride photocatalysts with 20 nm particle size reveals an additional eg resonance in the valence band that went unnoticed in previous TiO2 anion doping studies. The relative spectral weight of this Ti(3d)−O(2p) hybridized state with respect to and located between the readily established t2g and eg resonances scales qualitatively with the photocatalytic decomposition power, suggesting that this extra resonance bears co-responsibility for the photocatalytic performance of titanium oxynitrides at visible light wavelengths.
61 citations
TL;DR: In this article, the valence state of the Eu atom in Eu@C60 has been determined to be +2 by Eu LIII-edge XANES.
61 citations
PARC1
TL;DR: Using synchrotron radiation a new surface sensitive spectroscopy has been applied to determine the local structure of the first surface oxide layer formed on the Si(111) surface as mentioned in this paper.
60 citations