Results 11 to 20 of about 44,774 (227)

Early diagenetic vivianite [Fe-3(PO4)(2) center dot 8H(2)O] in a contaminated freshwater sediment and insights into zinc uptake: a mu-EXAFS, mu-XANES and Raman study [PDF]

open access: yes, 2008
The sediments in the Salford Quays, a heavily-modified urban water body, contain high levels of organic matter, Fe, Zn and nutrients as a result of past contaminant inputs.
Andrew J. Bennett   +40 more
core   +1 more source

Effective coordination numbers from EXAFS: general approaches for lanthanide and actinide dioxides

open access: yesJournal of Synchrotron Radiation, 2022
Extended X-ray absorption fine structure (EXAFS) is a comprehensive and usable method for characterizing the structures of various materials, including radioactive and nuclear materials. Unceasing discussions about the interpretation of EXAFS results for
Anna Romanchuk   +6 more
doaj   +1 more source

Nanoparticle size evaluation of catalysts by EXAFS: Advantages and limitations

open access: yesZaštita Materijala, 2016
In this article we determine particle size of nanocatalysts using the first-shell fitting results of Extended X-ray Absorption Fine Structure (EXAFS) measurements.
Nebojša S. Marinković   +1 more
doaj   +1 more source

EXAFS Analysis of Size-Constrained Semiconducting Materials [PDF]

open access: yes, 1990
Semiconducting materials such as CdSe, CdS, PbS and GaP are included in crystalline zeolite Y and mordenite and structurally flexible ethylene-methacrylic acid copolymer solid matrices.
Bein, Thomas   +5 more
core   +1 more source

Bayesian sparse modeling of extended x-ray absorption fine structure to determine interstitial oxygen positions in yttrium oxyhydride epitaxial thin film

open access: yesAIP Advances, 2021
This article presents a Bayesian sparse modeling method to analyze extended x-ray absorption fine structure (EXAFS) data with basis functions built on two-body signals.
Hiroyuki Kumazoe   +12 more
doaj   +1 more source

Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument

open access: yesApplied Sciences, 2020
Time-resolved X-ray methods are widely used for monitoring transient intermediates over the course of photochemical reactions. Ultrafast X-ray absorption and emission spectroscopies as well as elastic X-ray scattering deliver detailed electronic and ...
Dmitry Khakhulin   +13 more
doaj   +1 more source

Probing the role of thermal vibrational disorder in the SPT of VO $$_2$$ 2 by Raman spectroscopy

open access: yesScientific Reports, 2021
Phase competition in transition metal oxides has attracted remarkable interest for fundamental aspects and technological applications. Here, we report a concurrent study of the phase transitions in undoped and Cr-doped VO $$_2$$ 2 thin films.
Aminat Oyiza Suleiman   +6 more
doaj   +1 more source

LOCAL DISTORTIONS AND VOLUME CHANGES IN SEMICONDUCTORS - DONORS IN SILICON [PDF]

open access: yes, 2002
Experiments giving impurity-induced lattice distortion can measure quite distinct quantities. In particular EXAFS (extended X-ray fine structure) measures nearest-neighbour distances, whereas both volume changes and recent spectroscopic data measure long-
PAJOT, B, SCHOBER, HR, STONEHAM, AM
core   +1 more source

Data analysis in extended x-ray-absorption fine structure: Determination of the background absorption and the threshold energy [PDF]

open access: yes, 1983
Two approaches for the determination of the background absorption (μ_0) in the extended x-ray-absorption fine structure (EXAFS) are presented. Both methods, experimental and computational, take advantage of the damping of the EXAFS amplitude resulting ...
Baldeschwieler, John D.   +2 more
core   +1 more source

Dopant site selectivity in BaCe0.85M0.15O3-δ by extended x-ray absorption fine structure [PDF]

open access: yes, 2005
Rare earth doped BaCeO3 has been widely investigated as a proton conducting material. Trivalent dopants are generally assumed to fully occupy the Ce4+-site, and thereby introduce oxygen vacancies into the perovskite structure. Recent studies indicate the
Brennan, S.   +3 more
core   +1 more source

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