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Journal articles on the topic 'XANES'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Natori, Sachika, Minako Kurisu, Naomi Kawamura, and Yoshio Takahashi. "High-Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy for the Speciation of Fe in Aerosol Samples." Minerals 12, no. 5 (2022): 536. http://dx.doi.org/10.3390/min12050536.

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In this study, we compared the high-energy resolution X-ray fluorescence X-ray absorption near-edge structure (HERFD-XANES) and normal XANES spectra of various iron (Fe) species and Fe in atmospheric aerosol samples to explore the advantages of Fe K-edge HERFD-XANES for Fe speciation in aerosols using the linear combination fitting (LCF) of XANES spectra. We also conducted Fe extraction experiments to validate the LCF-XANES. In the HERFD-XANES spectra, the pre-edge region showed specific structures absent in normal XANES. HERFD-XANES also produced more distinctive shoulders within each spectru

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Natori, Sachika, Minako Kurisu, Naomi Kawamura, and Yoshio Takahashi. "High-Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy for the Speciation of Fe in Aerosol Samples." Minerals 12, no. 5 (2022): 536. http://dx.doi.org/10.3390/min12050536.

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In this study, we compared the high-energy resolution X-ray fluorescence X-ray absorption near-edge structure (HERFD-XANES) and normal XANES spectra of various iron (Fe) species and Fe in atmospheric aerosol samples to explore the advantages of Fe K-edge HERFD-XANES for Fe speciation in aerosols using the linear combination fitting (LCF) of XANES spectra. We also conducted Fe extraction experiments to validate the LCF-XANES. In the HERFD-XANES spectra, the pre-edge region showed specific structures absent in normal XANES. HERFD-XANES also produced more distinctive shoulders within each spectru

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3

Nicholls, M., M. N. Najman, Z. Zhang, M. Kasrai, P. R. Norton, and P. U. P. A. Gilbert. "The contribution of XANES spectroscopy to tribology." Canadian Journal of Chemistry 85, no. 10 (2007): 816–30. http://dx.doi.org/10.1139/v07-093.

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X-ray absorption near edge structure spectroscopy (XANES) analysis has been routinely used to study the complex chemical interactions between additives in engine oil and metallic surfaces during high-temperature and pressure reciprocating wear conditions. XANES analysis provides detailed chemical and structural information on the resultant antiwear and tribo films formed on metallic surfaces. The following review will illustrate how XANES analysis on the macro scale can provide the information required to elucidate complex film formation mechanisms, then describes the use of emerging XANES spe

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Ge, Mingyuan, and Wah-Keat Lee. "PyXAS – an open-source package for 2D X-ray near-edge spectroscopy analysis." Journal of Synchrotron Radiation 27, no. 2 (2020): 567–75. http://dx.doi.org/10.1107/s1600577520001071.

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In the synchrotron X-ray community, X-ray absorption near-edge spectroscopy (XANES) is a widely used technique to probe the local coordination environment and the oxidation states of specific elements within a sample. Although this technique is usually applied to bulk samples, the advent of new synchrotron sources has enabled spatially resolved versions of this technique (2D XANES). This development has been extremely powerful for the study of heterogeneous systems, which is the case for nearly all real applications. However, associated with the development of 2D XANES comes the challenge of a

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5

Kizler, P., P. Lamparter, and S. Steeb. "X -Ray Absorption Near Edge Structure (XANES) Calculations for the Amorphous Fe80B20- and Ni80B20-Alloys." Zeitschrift für Naturforschung A 44, no. 3 (1989): 189–94. http://dx.doi.org/10.1515/zna-1989-0304.

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Xanes spectra of the amorphous Fe80B20- and Ni80B20-alloys have been investigated using the electron multiple scattering theory of Durham et al. The calculations were based on several models for the structure of amorphous Fe80B20 and Ni80B20. Very good agreement between theoretical and experimental XANES curves was met. Opposite to former expectations for obtaining information on bond angles by XANES, this study shows that XANES points to more complex features of the structure than can be expressed in terms of bond angles.

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Park, Jae Yeon, Jitendra Pal Singh, Jun Lim, and Sangsul Lee. "Development of XANES nanoscopy on BL7C at PLS-II." Journal of Synchrotron Radiation 27, no. 2 (2020): 545–50. http://dx.doi.org/10.1107/s160057752000082x.

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X-ray absorption near-edge structure (XANES) imaging is a powerful tool to visualize the chemical state distribution of transition-metal-based materials at synchrotron radiation facilities. In recent years, the electrochemical working rechargeable battery has been the most studied material in XANES imaging owing to the large increase of portable electronics and electric vehicles. This work acknowledges the importance of battery analysis and has developed the XANES imaging system on BL7C at Pohang Light Source-II (PLS-II). BL7C employs an undulator taper configuration to obtain an energy band &

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Pongpiachan, Siwatt, Kanjana Thumanu, Charnwit Kositanont, et al. "Parameters Influencing Sulfur Speciation in Environmental Samples Using Sulfur K-Edge X-Ray Absorption Near-Edge Structure." Journal of Analytical Methods in Chemistry 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/659858.

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This paper aims to enhance the credibility of applying the sulfur K-edge XANES spectroscopy as an innovative “fingerprint” for characterizing environmental samples. The sensitivities of sulfur K-edge XANES spectra of ten sulfur compound standards detected by two different detectors, namely, Lytle detector (LyD) and Germanium detector (GeD), were studied and compared. Further investigation on “self-absorption” effect revealed that the maximum sensitivities of sulfur K-edge XANES spectra were achieved when diluting sulfur compound standards with boron nitride (BN) at the mixing ratio of 0.1%. Th

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Price, S. W. T., K. Ignatyev, K. Geraki та ін. "Chemical imaging of single catalyst particles with scanning μ-XANES-CT and μ-XRF-CT". Physical Chemistry Chemical Physics 17, № 1 (2015): 521–29. http://dx.doi.org/10.1039/c4cp04488f.

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Leri, Alessandra C., and Bruce Ravel. "Sample thickness and quantitative concentration measurements in BrK-edge XANES spectroscopy of organic materials." Journal of Synchrotron Radiation 21, no. 3 (2014): 623–26. http://dx.doi.org/10.1107/s1600577514001283.

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While XANES spectroscopy is an established tool for quantitative information on chemical structure and speciation, elemental concentrations are generally quantified by other methods. The edge step in XANES spectra represents the absolute amount of the measured element in the sample, but matrix effects and sample thickness complicate the extraction of accurate concentrations from XANES measurements, particularly at hard X-ray energies where the X-ray beam penetrates deeply into the sample. The present study demonstrates a method of quantifying concentration with a detection limit approaching 1

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10

RANJAN, RAKESH KUMAR. "Derivation of Relation between a parameter of Inverse correlation and effective Charge of X-ray absorbing K-Edge of Copper atom in it’s different Compounds." Journal of Ultra Scientist of Physical Sciences Section B 32, no. 5 (2020): 31–35. http://dx.doi.org/10.22147/jusps-b/320501.

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The article gives an overview of the XANES technique contribution to the analysis of multi-component catalysts. The theoretical basis of the technique, the interpretation of the energy position and intensity of XANES features, and the numerical methods developed to interpret XANES data on catalytic systems are described and discussed. XANES in the K-edge of copper in the systems. CuO, Cu(NO3)2, La2CuO4, CuCl2, and CuBr have been investigated and transitions have been assigned to the observed structures. The measurements have been used for calculating the first coordination bond distance in the

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11

Wakita, Hisanobu, Toshio Yamaguchi, Hirohiko Adachi, Manabu Fujiwara, and Seiichi Yamashita. "A Xanes Study of Square Copper(II) Complexes." Advances in X-ray Analysis 35, B (1991): 1115–20. http://dx.doi.org/10.1154/s0376030800013380.

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AbstractThe XANES (X-ray absorption near edge structure) spectra of copper(II) ions in solid state and in solution of the square-planar copper(II) complexes with tetraaza macrocycles were measured. The peaks in the measured XANES spectra shifted to lower energy side with increasing the electron density of central copper(II) ions. The molecular orbital calculations for the complexes were carried out by the DV-Xα method, and the theoretical XANES spectra were estimated. The clear chemical shift obtained by this XANES study is evaluated and leads to a new concept of π-back donation between the co

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Zhang, Linjuan, Jing Zhou, Jianyong Zhang, et al. "Extraction of local coordination structure in a low-concentration uranyl system by XANES." Journal of Synchrotron Radiation 23, no. 3 (2016): 758–68. http://dx.doi.org/10.1107/s1600577516001910.

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Obtaining structural information of uranyl species at an atomic/molecular scale is a critical step to control and predict their physical and chemical properties. To obtain such information, experimental and theoreticalL3-edge X-ray absorption near-edge structure (XANES) spectra of uranium were studied systematically for uranyl complexes. It was demonstrated that the bond lengths (R) in the uranyl species and relative energy positions (ΔE) of the XANES were determined as follows: ΔE1= 168.3/R(U—Oax)2− 38.5 (for the axial plane) and ΔE2= 428.4/R(U—Oeq)2− 37.1 (for the equatorial plane). These fo

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Blake, Anastasia V., Haochuan Wei, Courtney M. Donahue, Kyounghoon Lee, Jason M. Keith, and Scott R. Daly. "Solid energy calibration standards for PK-edge XANES: electronic structure analysis of PPh4Br." Journal of Synchrotron Radiation 25, no. 2 (2018): 529–36. http://dx.doi.org/10.1107/s1600577518000528.

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PK-edge X-ray absorption near-edge structure (XANES) spectroscopy is a powerful method for analyzing the electronic structure of organic and inorganic phosphorus compounds. Like all XANES experiments, PK-edge XANES requires well defined and readily accessible calibration standards for energy referencing so that spectra collected at different beamlines or under different conditions can be compared. This is especially true for ligandK-edge X-ray absorption spectroscopy, which has well established energy calibration standards for Cl (Cs2CuCl4) and S (Na2S2O3·5H2O), but not neighboring P. This pap

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14

Yi, Jun, Naoki Nakatani, and Kotohiro Nomura. "Solution XANES and EXAFS analysis of active species of titanium, vanadium complex catalysts in ethylene polymerisation/dimerisation and syndiospecific styrene polymerisation." Dalton Transactions 49, no. 24 (2020): 8008–28. http://dx.doi.org/10.1039/d0dt01139h.

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Mechanistic studies through the solution XANES and EXAFS analysis for V and Ti complex catalysed ethylene polymerisation/dimerization, and syndiospecific styrene polymerisation, including interpretation of the XANES spectra, have been introduced.

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Nakada, Ryoichi, Tomohiro Usui, Masashi Ushioda, and Yoshio Takahashi. "Vanadium micro-XANES determination of oxygen fugacity in olivine-hosted glass inclusion and groundmass glasses of martian primitive shergottite Yamato 980459." American Mineralogist 105, no. 11 (2020): 1695–703. http://dx.doi.org/10.2138/am-2020-7321.

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Abstract The redox condition of magma determines the stability and composition of crystallizing and volatile phases in martian meteorites, reflecting the evolution of the martian interior. In the current study, direct analyses on the oxidation states of V, Cr, and Fe were performed based on the X-ray absorption near-edge structure (XANES) measurements equipped with a micro-sized X-ray beam. We first applied the micro-XANES (μ-XANES) technique to the olivine-hosted glass inclusion and groundmass glass of martian meteorite Yamato 980459 (Y98), which is interpreted as representing a primary melt

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Nelson, Joey. "XANES reflects coordination change and underlying surface disorder of zinc adsorbed to silica." Journal of Synchrotron Radiation 28, no. 4 (2021): 1119–26. http://dx.doi.org/10.1107/s1600577521004033.

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Zinc K-edge X-ray absorption near-edge structure (XANES) spectroscopy of Zn adsorbed to silica and Zn-bearing minerals, salts and solutions was conducted to explore how XANES spectra reflect coordination environment and disorder in the surface to which a metal ion is sorbed. Specifically, XANES spectra for five distinct Zn adsorption complexes (Znads) on quartz and amorphous silica [SiO2(am)] are presented from the Zn–water–silica surface system: outer-sphere octahedral Znads on quartz, inner-sphere octahedral Znads on quartz, inner-sphere tetrahedral Znads on quartz, inner-sphere octahedral Z

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Martini, A., A. A. Guda, S. A. Guda, A. L. Bugaev, O. V. Safonova, and A. V. Soldatov. "Machine learning powered by principal component descriptors as the key for sorted structural fit of XANES." Physical Chemistry Chemical Physics 23, no. 33 (2021): 17873–87. http://dx.doi.org/10.1039/d1cp01794b.

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A novel PCA based XANES fit is introduced. This approach selects those combinations of structural parameters affecting more the variation of a XANES spectrum and determines the amount of accessible structural information.

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Pérez-Conesa, Sergio, José M. Martínez, Rafael R. Pappalardo, and Marcos Enrique Sánchez. "Extracting the Americyl Hydration from an Americium Cationic Mixture in Solution: A Combined X-ray Absorption Spectroscopy and Molecular Dynamics Study." Inorganic Chemistry 57, no. 14 (2018): 8089−8097. https://doi.org/10.1021/acs.inorgchem.8b00164.

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The Am(VI) solution chemistry differs from that of lighter actinoids, as U, Pu and Np, where the actinyl [AnO2]2+ is the most stable form and plays an important role in nuclear fuel technology. The behavior of americium in solution shows the trend to stabilize lower oxidation states, mainly Am(III). Riddle and col. (J. Radioanal. Nuclear Chem. 2016, 309, 1087.) have recently reported the EXAFS and first XANES spectra of an americium-containing aqueous solution where the Americyl species is detected in a mixture. We have developed Am3+-H2O and [AmO2]2+ -H2O intermolecular potentials based on qu

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19

Boonkerd, Kanoktip, and Wanwisa Limphirat. "The Influence of Chemical Compounds on the Sulfur K-Edge X-Ray Absorption near Edge Spectrum of the Vulcanized Rubber." Advanced Materials Research 905 (April 2014): 128–31. http://dx.doi.org/10.4028/www.scientific.net/amr.905.128.

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The vulcanized styrene-butadiene rubber (SBR) was studied using X-ray absorption near edge spectroscopy (XANES). The effect of the sulfur containing molecules left over in the sample on the precision of the sulfur K-edge XANES spectrum was focused. The six rubber compounds used here were vulcanized with different curing systems including convention, semi-efficiency and efficiency. For each compound, the measurements were preformed on two different samples which were the untreated and treated chloroform samples. The results showed when compounds were cured with conventional or semi-efficient vu

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Anzures, Brendan A., Stephen W. Parman, Ralph E. Milliken, Antonio Lanzirotti, and Matthew Newville. "XANES spectroscopy of sulfides stable under reducing conditions." American Mineralogist 105, no. 3 (2020): 375–81. http://dx.doi.org/10.2138/am-2020-7146.

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Abstract X-ray absorption near-edge structure (XANES) spectroscopy is a powerful technique to quantitatively investigate sulfur speciation in geologically complex materials such as minerals, glasses, soils, organic compounds, industrial slags, and extraterrestrial materials. This technique allows non-destructive investigation of the coordination chemistry and oxidation state of sulfur species ranging from sulfide (2–oxidation state) to sulfate (6+ oxidation state). Each sulfur species has a unique spectral shape with a characteristic K-edge representing the s → p and d hybridization photoelect

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21

Yadav, Ashok Kumar, Sk Maidul Haque, Shilpa Tripathi, et al. "Investigation of Fe doped ZnO thin films by X-ray absorption spectroscopy." RSC Advances 6, no. 78 (2016): 74982–90. http://dx.doi.org/10.1039/c6ra07195c.

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XANES and EXAFS studies have been carried out on Fe doped ZnO thin films having different Fe doping concentration ranging from 1% to 10% and the observed ferromagnetism in the samples is explained in the light of XANES and EXAFS observations.

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22

Vaithianathan, Veeramuthu, Jong Ha Moon, Chang-Hwan Chang, Kandasami Asokan, and Sang Sub Kim. "Electronic Structure of P-Doped ZnO Films with p-Type Conductivity." Journal of Nanoscience and Nanotechnology 6, no. 11 (2006): 3422–25. http://dx.doi.org/10.1166/jnn.2006.17953.

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The electronic structure of laser-deposited P-doped ZnO films was investigated by X-ray absorption near-edge structure spectroscopy (XANES) at the O K-, Zn K-, and Zn L3-edges. While the O K-edge XANES spectrum of the n-type P-doped ZnO demonstrates that the density of unoccupied states, primarily O 2p–P 3sp hybridized states, is significantly high, the O K-edge XANES spectrum of the p-type P-doped ZnO shows a sharp decrease in intensity of the corresponding feature indicating that P replaces O sites in the ZnO lattice, and thereby generating PO. This produces holes to maintain charge neutrali

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Sham, T. K., and R. A. Gordon. "RIXS at the cerium L3-edge of Ce(III) and Ce(IV) systems: some observations." Canadian Journal of Chemistry 93, no. 2 (2015): 218–26. http://dx.doi.org/10.1139/cjc-2014-0261.

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We report recent observations of resonant inelastic X-ray scattering (RIXS) at the cerium L3-edge of CePO4, CeO2, and Ce3+ ion in aqueous solution. The intensity of the emission spectrum, including the dispersive Raman below the edge and the emerging nondispersive fluorescence above the edge, was recorded with a solid-state detector with low-energy resolution and a WDX detector with modestly high-energy resolution. The yield of the emission was used to monitor the cerium L3-edge X-ray absorption near edge structures (XANES) in a constant initial state (CIS) mode as the photon energy sweeps acr

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Li, Zhigen, Peng Wang, Neal W. Menzies, et al. "Examining a synchrotron-based approach for in situ analyses of Al speciation in plant roots." Journal of Synchrotron Radiation 27, no. 1 (2020): 100–109. http://dx.doi.org/10.1107/s1600577519014395.

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Aluminium (Al) K- and L-edge X-ray absorption near-edge structure (XANES) has been used to examine Al speciation in minerals but it remains unclear whether it is suitable for in situ analyses of Al speciation within plants. The XANES analyses for nine standard compounds and root tissues from soybean (Glycine max), buckwheat (Fagopyrum tataricum), and Arabidopsis (Arabidopsis thaliana) were conducted in situ. It was found that K-edge XANES is suitable for differentiating between tetrahedral coordination (peak of 1566 eV) and octahedral coordination (peak of 1568 to 1571 eV) Al, but not suitable

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Lichtenberg, Henning, Boris Mahltig, Wantana Klysubun, Alexander Prange, and Josef Hormes. "SYNCHROTRON BASED X-RAY ABSORPTION SPECTROSCOPY FOR STRUCTURAL ANALYSIS OF BASALT FIBERS." Fibres and Textiles 31, no. 2 (2024): 56–65. http://dx.doi.org/10.15240/tul/008/2024-2-008.

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X-ray Absorption Near Edge Structure (XANES) spectroscopy at the Synchrotron Light Research Institute (Thailand) was used to investigate temperature related structural changes in basalt fibers. As a first step, XANES spectra of fiber samples cut from a basalt roving heated for 1 hour at 800 °C were recorded at the K absorption edges of three chemical elements and compared with the spectra of the untreated fibers. Silicon and calcium K-edge XANES spectra of the fibers were not affected by heating, whereas iron K-edge XANES spectra were significantly influenced by heating at 800 °C. The high iro

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Han, Kyoo-Seung, Masahiro Yoshimura, Joo-Byoung Yoon, Jin-Ho Choy та Kwang-Ja Park. "Pure tetravalent nickel in γ-type nickel oxyhydroxide as secondary battery electrode". Journal of Materials Research 13, № 4 (1998): 880–82. http://dx.doi.org/10.1557/jmr.1998.0118.

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Pure tetravalent nickel in γ-type cobalt substituted nickel oxyhydroxide, Ni0.70Co0.30O2K0.30(H2O)0.42, could be obtained by the “chimie douce” reaction. The presence of tetravalent nickel is confirmed by comparing the Ni K-edge XANES spectrum of the sample with those of reference compounds having various nickel valency and similar layer structure. The Co K-edge XANES spectrum indicates that the trivalent cobalt remains unchanged regardless of the nickel valency. The structural modification during chimie douce reaction observed from XRD patterns and the result of iodometric titration are consi

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Kobayashi, Kenji, Hiroshi Kawata, and Koichi Mori. "Site specification on normal and magnetic XANES of ferrimagnetic Fe3O4 by means of resonant magnetic Bragg scattering." Journal of Synchrotron Radiation 5, no. 3 (1998): 972–74. http://dx.doi.org/10.1107/s0909049597016646.

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Resonant magnetic Bragg scattering (RMBS) for several reflections has been measured at the Fe K-edge in Fe3O4. The normal and magnetic X-ray absorption near-edge structure (XANES) for two types of Fe ion site (tetrahedral and octahedral) were successfully determined from the analysis of DAFS and RMBS spectra on the assumption that there was an electric dipole transition. The obtained normal XANES for the octahedral site is well explained as a mixture of Fe2+ and Fe3+ ions, and the characteristic feature of the magnetic XANES at the pre-edge peak is mainly contributed from the Fe3+ ion at the t

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Pattammattel, A., R. Tappero, M. Ge, et al. "High-sensitivity nanoscale chemical imaging with hard x-ray nano-XANES." Science Advances 6, no. 37 (2020): eabb3615. http://dx.doi.org/10.1126/sciadv.abb3615.

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Resolving chemical species at the nanoscale is of paramount importance to many scientific and technological developments across a broad spectrum of disciplines. Hard x-rays with excellent penetration power and high chemical sensitivity are suitable for speciation of heterogeneous (thick) materials. Here, we report nanoscale chemical speciation by combining scanning nanoprobe and fluorescence-yield x-ray absorption near-edge structure (nano-XANES). First, the resolving power of nano-XANES was demonstrated by mapping Fe(0) and Fe(III) states of a reference sample composed of stainless steel and

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Pongpiachan, Siwatt, Kanjana Thumanu, Warangkana Na Pattalung, et al. "Diurnal Variation and Spatial Distribution Effects on Sulfur Speciation in Aerosol Samples as Assessed by X-Ray Absorption Near-Edge Structure (XANES)." Journal of Analytical Methods in Chemistry 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/696080.

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This paper focuses on providing new results relating to the impacts ofDiurnal variation,Vertical distribution, andEmission sourceon sulfur K-edge XANES spectrum of aerosol samples. All aerosol samples used in the diurnal variation experiment were preserved using anoxic preservation stainless cylinders (APSCs) and pressure-controlled glove boxes (PCGBs), which were specially designed to prevent oxidation of the sulfur states in PM10. Further investigation of sulfur K-edge XANES spectra revealed that PM10samples were dominated by S(VI), even when preserved in anoxic conditions. The “Emission sou

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Pierre, Le Pape, Blanchard Marc, Juhin Amélie, et al. "Local environment of arsenic in sulfide minerals: insights from high-resolution X-ray spectroscopies, and first-principles calculations at the As K-edge." Journal of Analytical Atomic Spectrometry 33, no. 12 (2018): 2070–82. http://dx.doi.org/10.1039/c8ja00272j.

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To improve our knowledge of arsenic local environment in sulfide minerals, Resonant Inelastic X-Ray Scattering (RIXS) maps and High-Energy Resolution Fluorescence Detected (HERFD) XANES measurements are performed at the As K-edge. In addition, the spectra are compared to XANES modelled through first-principles calculations.

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ASATURIAN, R. A. "XANES AND EPR SPECTROSCOPIC PROOFS FOR EXISTENCE OF PAIRING HOLES IN HIGH-Tc SUPERCONDUCTORS." Modern Physics Letters B 07, no. 04 (1993): 243–50. http://dx.doi.org/10.1142/s0217984993000254.

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XANES and EPR spectra data are presented which prove the existence of holes with 3d9L configuration in YBa 2 Cu 3 O 7 − δ at 293 K. With a growth of concentration of these holes, the absorption intensity in XANES spectra near the absorption of the formally trivalent copper at T < T c grows with the increase of T c . When this absorption appears in XANES spectra at T < T c , disappearance of EPR signal is observed under the same conditions. Such absorption is also observed in the bismuth ceramics at T < T c . The data obtained prove that pairing holes make a contribution to this absorp

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TOMBOLINI, F., A. MARCELLI, A. MOTTANA, G. CIBIN, M. F. BRIGATTI, and G. GIULI. "CRYSTAL-CHEMICAL STUDY BY XANES OF TRIOCTAHEDRAL MICAS: THE MOST CHARACTERISTIC LAYER SILICATES." International Journal of Modern Physics B 16, no. 11n12 (2002): 1673–79. http://dx.doi.org/10.1142/s0217979202011081.

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A crystal-chemical study of trioctahedral micas previously characterized by single-crystal XRD has been performed by XANES spectroscopy at the Si and Al K edges. XANES, being a local structural probe, can investigate distortion and modification of the tetrahedral sheet with increasing Fe for Mg substitution in the octahedral sheet. Comparison of XANES spectra allows determining the size of the tetrahedral site occupied by either Si or Al. The Si-O distance remains essentially unchanged whereas the Al-O distance appears to increase. The behavior may be interpreted as a tilt of the tetrahedra, i

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Roesch, Philipp, Christian Vogel, Thomas Huthwelker, Philipp Wittwer, and Franz-Georg Simon. "Investigation of per- and polyfluoroalkyl substances (PFAS) in soils and sewage sludges by fluorine K-edge XANES spectroscopy and combustion ion chromatography." Environmental Science and Pollution Research 29, no. 18 (2021): 26889–99. http://dx.doi.org/10.1007/s11356-021-17838-z.

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AbstractFor the first time, fluorine K-edge X-ray absorption near-edge structure (XANES) spectroscopy was applied to detect per- and polyfluoroalkyl substances (PFAS) in various soil and sewage sludge samples. The method can be used to determine the speciation of inorganic and organic fluorides, without pre-treatment of solid samples. Therefore, XANES spectra of several inorganic fluorides as well as selected fluorinated organic compounds were recorded. While inorganic fluorides partially exhibit a variety of sharp spectral features in the XANES spectrum, almost all inspected organofluorine co

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Kawata, H. "Site-specific magnetic XANES." Acta Crystallographica Section A Foundations of Crystallography 49, s1 (1993): c22. http://dx.doi.org/10.1107/s0108767378099365.

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Rehr, J. J., S. I. Zabinsky, A. Ankudinov, and R. C. Albers. "Atomic-XAFS and XANES." Physica B: Condensed Matter 208-209 (March 1995): 23–26. http://dx.doi.org/10.1016/0921-4526(94)00623-4.

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Vvedensky, D. D., and J. B. Pendry. "Fast xanes perturbation schemes." Surface Science Letters 152-153 (April 1985): A107. http://dx.doi.org/10.1016/0167-2584(85)90067-2.

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Vvedensky, D. D., and J. B. Pendry. "Fast XANES perturbation schemes." Surface Science 152-153 (April 1985): 33–37. http://dx.doi.org/10.1016/0039-6028(85)90122-0.

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Etschmann, Barbara E., Erica Donner, Joël Brugger, et al. "Speciation mapping of environmental samples using XANES imaging." Environmental Chemistry 11, no. 3 (2014): 341. http://dx.doi.org/10.1071/en13189.

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Environmental context Recently developed fast fluorescence detectors have opened the way to the development of element speciation mapping, i.e. X-ray absorption near edge spectroscopy (XANES) imaging, of environmental samples. This technique is potentially very informative but is also highly data intensive. Here, we used XANES imaging to explore the distribution of Cu species in biosolid materials, destined for agricultural use, as this is of importance in relation to the bioavailability and potential toxicity of this metal. Abstract Fast X-ray detectors with large solid angles and high dynami

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Zhang, Yuanpeng, Osman Ersoy, Ali Karatutlu, William Little, and Andrei Sapelkin. "Local structure of Ge quantum dots determined by combined numerical analysis of EXAFS and XANES data." Journal of Synchrotron Radiation 23, no. 1 (2016): 253–59. http://dx.doi.org/10.1107/s160057751501913x.

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The sensitivity of X-ray absorption near-edge structure (XANES) to the local symmetry has been investigated in small (∼4 nm) matrix-free Ge quantum dots. TheFDMNESpackage was used to calculate the theoretical XANES spectra that were compared with the experimental data of as-prepared and annealed nanoparticles. It was found that XANES data for an as-prepared sample can only be adequately described if the second coordination shell of the diamond-type structural model is included in theFDMNEScalculations. This is in contrast to the extended X-ray absorption fine-structure data that show only the

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Parsons, J. G., M. L. Lopez, H. Castillo-Michel, J. R. Peralta-Videa, and J. L. Gardea-Torresdey. "Arsenic Speciation in Biological Samples Using XAS and Mixed Oxidation State Calibration Standards of Inorganic Arsenic." Applied Spectroscopy 63, no. 8 (2009): 961–70. http://dx.doi.org/10.1366/000370209788964359.

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The speciation of elements without pre-edge features preformed with X-ray absorption near edge structure (XANES) can lead to problems when the energy difference between two species is small. The speciation of arsenic (As) in plant samples was investigated using the mixtures As2S3/As2O5, As2S3/As2O3, or As2O3/As2O5. The data showed that the energy separation (eV) between As2O5 and As2S3 was 5.8, between As2O3 and As2O5 was 3.6, and between As2S3 and As2O3 was 2.1. From the intensity of the white-line feature and the concentration of As species, calibration curves showing a limit of detection of

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Манякин, М. Д., С. И. Курганский, О. И. Дубровский, О. А. Чувенкова, Э. П. Домашевская та С. Ю. Турищев. "Ab initio моделирование и синхротронные рентгеноспектральные исследования оксидов олова вблизи Sn L-=SUB=-3-=/SUB=--краев поглощения". Физика твердого тела 58, № 12 (2016): 2294. http://dx.doi.org/10.21883/ftt.2016.12.43845.235.

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Представлены результаты теоретических и экспериментальных исследований электронно-энергетического строения зоны проводимости оксидов олова. Методом линеаризованных присоединенных плоских волн (ЛППВ) впервые рассчитана тонкая структура вблизи L3-краев поглощения олова (XANES) для монокристаллов металлического олова, монооксида олова, а также тетрагональной и орторомбической фаз диоксида олова. Тонкая структура спектров XANES сопоставлена с особенностями распределения локальной парциальной плотности состояний олова изученных соединений. Проведен совместный анализ результатов моделирования и эксп

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Christensen, C. R., J. N. Cutler, and D. A. Christensen. "Using X-ray absorption near edge structure (XANES) spectroscopy to determine selenium oxidation states in animal mineral supplements and feeds." Canadian Journal of Animal Science 84, no. 2 (2004): 171–75. http://dx.doi.org/10.4141/a03-099.

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Synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy is a relatively new technique within the life sciences. XANES has been utilized to identify the location, oxidation state and spatial distribution of heavy metal elements in plants , neurons, blood and DNA, but has not been widely used in the animal sciences. Selenium content in animal feeds is monitored, as both selenium deficiencies and toxicities are associated with physiological disorders. Selenium is available as an animal feed in both inorganic and organic states. The bioavailability of selenium species has been

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Домашевская, Э. П., А. А. Гуда, А. В. Чернышев та В. Г. Ситников. "Особенности локальной атомной структуры металлических слоев многослойных наноструктур (CoFeZr/SiO-=SUB=-2-=/SUB=-)-=SUB=-32-=/SUB=- и (CoFeZr/a-Si)-=SUB=-40-=/SUB=- с различными прослойками". Физика твердого тела 59, № 2 (2017): 373. http://dx.doi.org/10.21883/ftt.2017.02.44065.296.

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Многослойные наноструктуры (МНС) получали путем ионно-лучевого напыления в атмосфере аргона на поверхность вращающейся ситалловой подложки последовательно из двух мишеней, одна из которых была металлическая пластина сплава Co45Fe45Zr10, а второй мишенью была пластина из кварца (SiO2) или кремния. Тонкая структура рентгеновских спектров поглощения XANES вблизи K-краев Co и Fe в образце (CoFeZr/SiO2)32 с оксидными прослойками подобна XANES металлической фольги Fe. Это указывает на наличие в металлических слоях МНС нанокристаллов CoFeZr с локальным окружением, аналогичным локальному окружению ато

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Takaoka, M., T. Yamamoto, S. Fujiwara, et al. "Chemical states of trace elements in sewage sludge incineration ash by using x-ray absorption fine structure." Water Science and Technology 57, no. 3 (2008): 411–17. http://dx.doi.org/10.2166/wst.2008.025.

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In this study, the chemical states of chromium (Cr), arsenic (As), and selenium (Se) in sewage sludge incineration ash were determined by X-ray absorption fine structure (XAFS) spectroscopy. Sewage sludge incineration ash was sampled from several facilities, and XAFS measurements were carried out with a beam line BL01B1 at the SPring-8 facility. Cr K-edge X-ray absorption near-edge structure (XANES) spectra suggested that Cr compounds were predominantly speciated as Cr(III) and the fraction of Cr(VI) was very minor. Compared to the reference materials, Cr XANES spectra of the incineration ashe

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Budi, Hariyanto, Husain Husain, Lapboonruang Supanun, and Pratapa Suminar. "Examination of Natural and Standard Fe₃O₄ Powders Using X-Ray Absorption Near-Edge Spectroscopy (XANES)." Materials Science Forum 964 (July 2019): 40–44. http://dx.doi.org/10.4028/www.scientific.net/msf.964.40.

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Investigation of Fe K-edge X-Ray Absorption Near Edge Spectroscopy (XANES) spectra of Fe3O4 (FeO.Fe2O3) from natural source compared with the Fe3O4 standard is presented. The natural Fe3O4 powder was prepared from ironstone of Tanah Laut, Kalimantan Selatan by co-precipitation method. XANES measurements in transmission mode were performed at the Synchrotron Light Research Institute (SLRI), Nakhon Ratchasima, Thailand. XRD phase analysis confirms that the synthesized Fe3O4 powder is a single phase, but it cannot determine the proportion of Fe2O3 and FeO in the structure. TEM measurement confirm

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Diacomanolis, Violet, Barry N. Noller, Raijeli Taga, Hugh H. Harris, Jade B. Aitken, and Jack C. Ng. "Relationship of arsenic speciation and bioavailability in mine wastes for human health risk assessment." Environmental Chemistry 13, no. 4 (2016): 641. http://dx.doi.org/10.1071/en14152.

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Environmental context X-ray absorption near-edge spectroscopy (XANES) was applied to give arsenic chemical forms directly in the solid phase of mine wastes from two mine sites, including fluvial dispersion. The arsenic speciation data explained the variation of in vitro bioaccessibility and in vivo bioavailability (rat uptake) data of the mine wastes. The As speciation from XANES fitting supported the hypothesis that when soil intake is adjusted for bioaccessibility, the potential health risk estimate to local residents is significantly lower. Abstract X-ray absorption near-edge spectroscopy (

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Martin, R. R., S. J. Naftel, T. K. Sham, B. Hart, and M. A. Powell. "XANES of chromium in sludges used as soil ameliorants." Canadian Journal of Chemistry 81, no. 2 (2003): 193–96. http://dx.doi.org/10.1139/v03-013.

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Samples of sewage sludges proposed for use as soil ameliorants in an Indo-Canadian project were tested for chromium content. Standard aqua regia extractions found one sludge to have excessive amounts of Cr. X-ray absorption near-edge structure (XANES) spectroscopy, however, indicated that the Cr was present in the relatively benign Cr(III) oxidation state in all the sludge samples.Key words: soil, chromium, synchrotron, XANES.

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Taweepreda, Wirach, Wanwisa Limphirat, and Prayoon Songsiriritthigul. "Oxidative Degradation Monitoring of Natural Rubber Using S K-Edge X-Ray Absorption near-Edge Spectroscopy (XANES)." Advanced Materials Research 620 (December 2012): 440–45. http://dx.doi.org/10.4028/www.scientific.net/amr.620.440.

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In this work, we present the results of sulfur crosslinking and degradation in natural rubber (NR) studied by X-ray absorption near-edge structure spectroscopy (XANES). Sulfur K-edge XANES spectra has been collected and analyzed to provide the geometry and electronic environment of sulfur crosslinks during vulcanization and degradation processes by ozone aging. We found that reversion took place before the onset of oxidative process at the sulfur bridge. Parallel to the oxidative process, the production of cyclic sulfanes took places. This physico-chemical properties which were calculated from

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Zhou, Jigang, Xingtai Zhou, Xuhui Sun, et al. "Electronic structures of CdSe nanocrystals — An X-ray absorption near-edge structure (XANES) investigation." Canadian Journal of Chemistry 85, no. 10 (2007): 756–60. http://dx.doi.org/10.1139/v07-080.

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CdSe nanocrystals (NCs), capped with trioctylphosphine oxide and 1-octadecanamine, have been synthesized with colloidal methods. Both UV–vis absorption and photoluminescence spectra show that the prepared nanostructures exhibit a quantum confinement effect. X-ray absorption near–edge structure (XANES) at Se K-edge recorded in fluorescence yield mode have been carried out on these NCs, with different size and capping ligands to gain insight into how their electronic structures are affected by the NC size and chemical properties of the ligands. The results indicate that XANES are sensitive to bo

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Boesenberg, Ulrike, Christopher G. Ryan, Robin Kirkham, et al. "Fast XANES fluorescence imaging using a Maia detector." Journal of Synchrotron Radiation 25, no. 3 (2018): 892–98. http://dx.doi.org/10.1107/s1600577518004940.

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A new fast X-ray absorption spectroscopy scanning method was recently implemented at the Hard X-ray Microprobe endstation P06, PETRA III, DESY, utilizing a Maia detector. Spectromicroscopy maps were acquired with spectra for X-ray absorption near-edge structure (XANES) acquisition in the sub-second regime. The method combines XANES measurements with raster-scanning of the sample through the focused beam. The order of the scanning sequence of the axes, one beam energy axis and two (or more) spatial axes, is a variable experimental parameter and, depending on it, the dwell at each location can b

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