Results 161 to 170 of about 5,999 (204)

Spatial engineering and d-orbital coupling in axial dual-atom sites for bifunctional oxygen catalysis. [PDF]

Nat Commun
Yan X, Yuan X, Liu N, Liao B, Liang Z, Liu W, Huang Y, Yan L, Zheng Q, Chen S, Xie X, Gui X, Bin Yang H, Li J, Yu D, Zeng Z, Yang G.   +16 more
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X-ray excited optical luminescence (XEOL) detection of x-ray absorption fine structure (XAFS)

Journal of Chemical Physics, 1998
The x-ray excited optical luminescence (XEOL) from a variety of rare-earth ions was used as a detection mode for the collection of L-edge x-ray absorption fine-structure (XAFS) data. In order to understand the source of the observed optical signal, advantage is taken of the known luminescent response of f ions in a variety of transparent host materials.
Mark Antonio, Lynda Söderholm, Liu G K   +2 more
exaly   +2 more sources

X-Ray Absorption Fine Structure (Xafs) Studies Of Cobalt Silicide Thin Films [PDF]

MRS Proceedings, 1998
ABSTRACTCobalt silicide thin films, prepared on Si(100) wafers, have been studied by X-ray absorption near edge structures (XANES) at the Si K-, L2,3 and Co K-edges utilizing both total electron (TEY) and fluorescence yield (FLY) detection as well as extended X-ray absorption fine structure (EXAFS) at the Co K-edge.
S. J. Naftel, I Coulthard, Y. Hu, T. K. Sham, M. Zinke-Allmang   +4 more
openaire   +2 more sources

Speciation using X-ray absorption fine structure (XAFS)

Review Journal of Chemistry, 2015
X-ray absorption fine structure (XAFS) spectroscopy is in use as a unique fingerprinting technique. By employing spectra of well-defined chemical species (standards), XAFS can be analyzed for speciation, i.e., identification and quantification of the different chemical species present in a sample.
Abhijeet Gaur, Shrivastava B D, B D Shrivastava   +2 more
exaly   +2 more sources

X–ray absorption fine structure (XAFS) of Si wafer measured using total reflection X–rays

Spectrochimica Acta, Part B: Atomic Spectroscopy, 1999
Abstract Extended X–ray absorption fine structure (EXAFS) and X–ray absorption near edge structure (XANES) spectra of a Si wafer are measured using grazing incidence X–rays. The spectra are measured using the total electron yield method. Fourier transform of the measured EXAFS oscillation is compared among different glancing angles.
Jun Kawai, Shinjiro Hayakawa, Yoshinori Kitajima   +2 more
exaly   +2 more sources

Oxybarometry and valence quantification based on microscale X-ray absorption fine structure (XAFS) spectroscopy of multivalent elements

Chemical Geology, 2020
Abstract X-ray absorption fine structure (XAFS) spectroscopy has proven to be a valuable tool in defining valence states of multivalent elements in minerals and glasses that can then be used as oxybarometry proxies. First row transition multivalent elements Ti, V, Cr, and Fe are common targets.
Matthew Newville, Stephen Sutton, Antonio Lanzirotti   +2 more
exaly   +2 more sources

X-ray absorption fine structure (XAFS) analyses of Ni species trapped in graphene sheet of carbon nanofibers

Physical Review B, 2006
Metal impurities in the carbon nanotubes and carbon nanofibers play an important role in understanding their physical and chemical properties. We apply the Ni $K$-edge x-ray absorption fine structure analyses to the local electronic and geometric structures around embedded Ni impurities used as catalysts in a carbon nanofiber in combination with ...
Yoshinori Sato, Kiyotaka Asakura, Wang-Jae Chun   +2 more
exaly   +2 more sources

Fourteenth International Conference on X-ray Absorption Fine Structure (XAFS-14)

Synchrotron Radiation News, 2010
The university town of Camerino in central Italy hosted the Fourteenth International Conference on X-ray Absorption Fine Structure (XAFS-14) in July 2009. This historical town, surrounded by the rolling hills and beautiful countryside of the Marche region, was an ideal location for a stimulating conference, providing an optimal mix of good ...
Federico Boscherini, Matthew Newville
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X-ray Absorption Fine Structure (XAFS) Spectroscopy

2008
17d.1 X-ray Absorption Fine Structure (XAFS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605 17d.1.1 Experimental Setup and Data Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606 17d.1.2 EXAFS: Extended X-ray Absorption Fine Structure . . . . . . . . . . . . . . . . . . 608 17d.1.3 XANES: X-ray Absorption
Rothe, J., Leon, A.
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Sorption Mechanisms of Zinc to Calcium Silicate Hydrate:  X-ray Absorption Fine Structure (XAFS) Investigation

Environmental Science & Technology, 2001
In this study, X-ray absorption fine structure (XAFS) spectroscopy has been used to further elucidate the binding mechanisms of Zn(II) to calcium silicate hydrate (C-S-H), the quantitatively most important cement mineral. Such knowledge is essential for the assessment of the longterm behavior of cement-stabilized waste materials. XAFS spectra of the Zn(
F, Ziegler, A M, Scheidegger, C A, Johnson, R, Dähn, E, Wieland   +4 more
openaire   +2 more sources