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Duggal H, Kapil A, Kailash, Mehta D, Kumar S. Influence of chemical effects on the Li (i = 1–3) subshell X-ray spectra for 79Au compounds. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2021.109885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Berryman EJ, Paktunc D. Cr(VI) formation in ferrochrome-smelter dusts. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126873. [PMID: 34418832 DOI: 10.1016/j.jhazmat.2021.126873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/05/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
Dusts generated during ferrochrome smelting in a pilot-scale DC arc furnace were sampled from the furnace freeboard and from the off-gas handling stream (cyclone and baghouse). The dusts comprise fine-grained feed material (chromite, flux, and reductant); compositionally heterogeneous, glassy micro-spherules, interpreted as gas condensates and/or aerosolized melt droplets; and trace amounts of ferrochrome. Synchrotron-based micro-X-ray-fluorescence and micro-X-ray absorption near-edge structure around the chromium (Cr) K-edge was used to identify the distribution and speciation of Cr in dust particulates from the freeboard and the cyclone. The dust samples contain Cr in multiple oxidation states, including Cr(0) (hosted by ferrochrome), Cr(III), and Cr(VI). The majority of Cr occurs as Cr(III) in chromite. In both the furnace-freeboard and the cyclone dusts, Cr(VI) was consistently associated with the Si-Ca-Mg-rich micro-spherules. A major finding of this study is that Cr oxidation and Cr(VI) formation can occur in aerosolized dusts within the closed DC-arc furnace during ferrochrome smelting under conditions that are deemed to be essentially reducing. The association of Cr(VI) with the micro-spherules forwards the hypothesis that the high temperature of the furnace off-gasses and the flux composition influence the likelihood of Cr(VI) formation within a closed furnace under open-bath smelting conditions.
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Affiliation(s)
- Eleanor J Berryman
- CanmetMINING, Natural Resources Canada, 555 Booth Street, Ottawa, Ontario, Canada K1A OG1.
| | - Dogan Paktunc
- CanmetMINING, Natural Resources Canada, 555 Booth Street, Ottawa, Ontario, Canada K1A OG1
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3
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Guda AA, Guda SA, Lomachenko KA, Soldatov MA, Pankin IA, Soldatov AV, Braglia L, Bugaev AL, Martini A, Signorile M, Groppo E, Piovano A, Borfecchia E, Lamberti C. Quantitative structural determination of active sites from in situ and operando XANES spectra: From standard ab initio simulations to chemometric and machine learning approaches. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.071] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4
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Soldatov MA, Martini A, Bugaev AL, Pankin I, Medvedev PV, Guda AA, Aboraia AM, Podkovyrina YS, Budnyk AP, Soldatov AA, Lamberti C. The insights from X-ray absorption spectroscopy into the local atomic structure and chemical bonding of Metal–organic frameworks. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Wisawapipat W, Kretzschmar R. Solid Phase Speciation and Solubility of Vanadium in Highly Weathered Soils. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:8254-8262. [PMID: 28657305 DOI: 10.1021/acs.est.7b01005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Vanadium (V) is increasingly recognized both as a medical trace element with essential biological functions and as a potentially toxic environmental pollutant, yet the current knowledge on V speciation in soils is limited. Here, we investigated the chemical speciation and extractability of V in highly weathered tropical soils, which are often rich in V compared to soils of temperate climatic regions. Vanadium K-edge X-ray absorption near edge structure (XANES) spectra of soil samples, along with a range of reference compounds differing in V-oxidation state and coordination chemistry, revealed the predominance of V4+/5+ in a primarily octahedral or tetrahedral coordination. The soil spectra were best fitted with linear combinations of reference spectra of V4+ in the structure of kaolinite, V5+ adsorbed to kaolinite, and other V5+-sorbed solids. Vanadate adsorbed to goethite, ferrihydrite, gibbsite, and/or Fe(III)-natural organic matter complexes and V4+ in the structure of goethite may be present, but cannot unequivocally be distinguished from each other by XANES spectroscopy. Sequential and single chemical extractions provided complementary information on the solubility of V under various conditions. The most labile V fractions, interpreted as weakly and strongly adsorbed V5+, are the most relevant to V mobility and bioavailability in the environment, and accounted for only ∼2% of total soil V. Our results demonstrate that kaolinite and Fe oxides can effectively sequester V in highly weathered soils by mechanisms of adsorption and structural incorporation and are relevant to other Fe-oxide-rich environments under acidic and oxic conditions.
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Affiliation(s)
- Worachart Wisawapipat
- Department of Soil Science, Faculty of Agriculture, Kasetsart University , Bangkok 10900, Thailand
- Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, CHN , 8092 Zürich, Switzerland
| | - Ruben Kretzschmar
- Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, CHN , 8092 Zürich, Switzerland
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Tsakoumis NE, Walmsley JC, Rønning M, van Beek W, Rytter E, Holmen A. Evaluation of Reoxidation Thresholds for γ-Al2O3-Supported Cobalt Catalysts under Fischer–Tropsch Synthesis Conditions. J Am Chem Soc 2017; 139:3706-3715. [DOI: 10.1021/jacs.6b11872] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nikolaos E. Tsakoumis
- Department of Chemical
Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - John C. Walmsley
- Department of Physics, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
- SINTEF Materials and Chemistry, NO-7465, Trondheim, Norway
| | - Magnus Rønning
- Department of Chemical
Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | | | - Erling Rytter
- Department of Chemical
Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - Anders Holmen
- Department of Chemical
Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
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Zahran ZN, Mohamed EA, Ohta T, Naruta Y. Electrocatalytic Water Oxidation by a Highly Active and Robust α-Mn2O3Thin Film Sintered on a Fluorine-Doped Tin Oxide Electrode. ChemCatChem 2015. [DOI: 10.1002/cctc.201501073] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Zaki N. Zahran
- Center for Chemical Energy Conversion Research; Institute for Science and Technology Research; Chubu University; Kasugai 487-8501 Japan
- Faculty of Science; Tanta University; Tanta 31527 Egypt
| | - Eman A. Mohamed
- Center for Chemical Energy Conversion Research; Institute for Science and Technology Research; Chubu University; Kasugai 487-8501 Japan
| | - Takehiro Ohta
- Picobiology Institute; Graduate School of life Science; University of Hyogo; Hyogo 679-5148 Japan
| | - Yoshinori Naruta
- Center for Chemical Energy Conversion Research; Institute for Science and Technology Research; Chubu University; Kasugai 487-8501 Japan
- JST ACT-C; Kawaguchi Saitama 332-0012 Japan
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Guda SA, Guda AA, Soldatov MA, Lomachenko KA, Bugaev AL, Lamberti C, Gawelda W, Bressler C, Smolentsev G, Soldatov AV, Joly Y. Optimized Finite Difference Method for the Full-Potential XANES Simulations: Application to Molecular Adsorption Geometries in MOFs and Metal-Ligand Intersystem Crossing Transients. J Chem Theory Comput 2015; 11:4512-21. [PMID: 26575941 DOI: 10.1021/acs.jctc.5b00327] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Accurate modeling of the X-ray absorption near-edge spectra (XANES) is required to unravel the local structure of metal sites in complex systems and their structural changes upon chemical or light stimuli. Two relevant examples are reported here concerning the following: (i) the effect of molecular adsorption on 3d metals hosted inside metal-organic frameworks and (ii) light induced dynamics of spin crossover in metal-organic complexes. In both cases, the amount of structural models for simulation can reach a hundred, depending on the number of structural parameters. Thus, the choice of an accurate but computationally demanding finite difference method for the ab initio X-ray absorption simulations severely restricts the range of molecular systems that can be analyzed by personal computers. Employing the FDMNES code [Phys. Rev. B, 2001, 63, 125120] we show that this problem can be handled if a proper diagonalization scheme is applied. Due to the use of dedicated solvers for sparse matrices, the calculation time was reduced by more than 1 order of magnitude compared to the standard Gaussian method, while the amount of required RAM was halved. Ni K-edge XANES simulations performed by the accelerated version of the code allowed analyzing the coordination geometry of CO and NO on the Ni active sites in CPO-27-Ni MOF. The Ni-CO configuration was found to be linear, while Ni-NO was bent by almost 90°. Modeling of the Fe K-edge XANES of photoexcited aqueous [Fe(bpy)3](2+) with a 100 ps delay we identified the Fe-N distance elongation and bipyridine rotation upon transition from the initial low-spin to the final high-spin state. Subsequently, the X-ray absorption spectrum for the intermediate triplet state with expected 100 fs lifetime was theoretically predicted.
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Affiliation(s)
| | | | | | - Kirill A Lomachenko
- Department of Chemistry, NIS and CrisDi Centers, Turin University and INSTM Reference Center , 10125 Turin, Turin, Italy
| | | | - Carlo Lamberti
- Department of Chemistry, NIS and CrisDi Centers, Turin University and INSTM Reference Center , 10125 Turin, Turin, Italy
| | | | - Christian Bressler
- European XFEL, Albert-Einstein-Ring 19, 22761 Hamburg, Germany.,The Hamburg Centre for Ultrafast Imaging (CUI), Universität Hamburg , Luruper Chaussee 149, 22761 Hamburg, Germany
| | | | | | - Yves Joly
- Inst NEEL, Université Grenoble Alpes , 38042 Grenoble, France.,Institut NEEL, CNRS , 38042 Grenoble, France
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Garino C, Borfecchia E, Gobetto R, van Bokhoven JA, Lamberti C. Determination of the electronic and structural configuration of coordination compounds by synchrotron-radiation techniques. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.03.027] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Abstract
Metalloproteins are enormously important in biology. While a variety of techniques exist for studying metals in biology, X-ray absorption spectroscopy is particularly useful in that it can determine the local electronic and physical structure around the metal center, and is one of the few avenues for studying "spectroscopically silent" metal ions like Zn(II) and Cu(I) that have completely filled valence bands. While X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) are useful for studying metalloprotein structure, they suffer the limitation that the detected signal is an average of all the various metal centers in the sample, which limits its usefulness for studying metal centers in situ or in cell lysates. It would be desirable to be able to separate the various proteins in a mixture prior to performing X-ray absorption studies, so that the derived signal is from one species only. Here we describe a method for performing X-ray absorption spectroscopy on protein bands following electrophoretic separation and western blotting.
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Affiliation(s)
- Jesse Ward
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, 60439, USA
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11
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Bordiga S, Groppo E, Agostini G, van Bokhoven JA, Lamberti C. Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques. Chem Rev 2013; 113:1736-850. [DOI: 10.1021/cr2000898] [Citation(s) in RCA: 488] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silvia Bordiga
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Elena Groppo
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Giovanni Agostini
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Jeroen A. van Bokhoven
- ETH Zurich, Institute for Chemical and Bioengineering, HCI E127 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry (LSK) Swiss Light Source, Paul Scherrer Instituteaul Scherrer Institute, Villigen, Switzerland
| | - Carlo Lamberti
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
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Monico L, Van der Snickt G, Janssens K, De Nolf W, Miliani C, Verbeeck J, Tian H, Tan H, Dik J, Radepont M, Cotte M. Degradation process of lead chromate in paintings by Vincent van Gogh studied by means of synchrotron X-ray spectromicroscopy and related methods. 1. Artificially aged model samples. Anal Chem 2011; 83:1214-23. [PMID: 21314201 DOI: 10.1021/ac102424h] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
On several paintings by artists of the end of the 19th century and the beginning of the 20th Century a darkening of the original yellow areas, painted with the chrome yellow pigment (PbCrO(4), PbCrO(4)·xPbSO(4), or PbCrO(4)·xPbO) is observed. The most famous of these are the various Sunflowers paintings Vincent van Gogh made during his career. In the first part of this work, we attempt to elucidate the degradation process of chrome yellow by studying artificially aged model samples. In view of the very thin (1-3 μm) alteration layers that are formed, high lateral resolution spectroscopic methods such as microscopic X-ray absorption near edge (μ-XANES), X-ray fluorescence spectrometry (μ-XRF), and electron energy loss spectrometry (EELS) were employed. Some of these use synchrotron radiation (SR). Additionally, microscopic SR X-ray diffraction (SR μ-XRD), μ-Raman, and mid-FTIR spectroscopy were employed to completely characterize the samples. The formation of Cr(III) compounds at the surface of the chrome yellow paint layers is particularly observed in one aged model sample taken from a historic paint tube (ca. 1914). About two-thirds of the chromium that is present at the surface has reduced from the hexavalent to the trivalent state. The EELS and μ-XANES spectra are consistent with the presence of Cr(2)O(3)·2H(2)O (viridian). Moreover, as demonstrated by μ-XANES, the presence of another Cr(III) compound, such as either Cr(2)(SO(4))(3)·H(2)O or (CH(3)CO(2))(7)Cr(3)(OH)(2) [chromium(III) acetate hydroxide], is likely.
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Affiliation(s)
- Letizia Monico
- Dipartimento di Chimica, Università degli Studi di Perugia, Perugia, Italy
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Yoshitake H, Nakajima H, Oumi Y, Sano T. Control of spacing between aminoalkyl functions by mesostructural transition in a polysilsesquioxane lamellar assembly. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b920628k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Leita L, Margon A, Pastrello A, Arcon I, Contin M, Mosetti D. Soil humic acids may favour the persistence of hexavalent chromium in soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2009; 157:1862-1866. [PMID: 19231051 DOI: 10.1016/j.envpol.2009.01.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 01/20/2009] [Accepted: 01/22/2009] [Indexed: 05/27/2023]
Abstract
The interaction between hexavalent chromium Cr(VI), as K(2)CrO(4), and standard humic acids (HAs) in bulk solution was studied using three complementary analytical methods: UV-Visible spectroscopy, X-ray absorption spectroscopy and differential pulse stripping voltammetry. The observed UV-Vis and X-ray absorption spectra showed that, under our experimental conditions, HAs did not induce reduction of Cr(VI) to its trivalent chemical form. The interaction between Cr(VI) and HAs has rather led to the formation of Cr(VI)-HAs micelles via supramolecular chemical processes. The reported results could contribute towards explaining the relative persistence of ecotoxic hexavalent chromium in soils.
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Affiliation(s)
- Liviana Leita
- A.R.C. Agricultural Research Council-Research Group on Soil-Plant Systems, Via Trieste 23, 34170 Gorizia, Italy.
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de Castro FR, Lam YL, Herbst MH, Santos FM, Pereira MM. Thermal treatment study of vanadium-loaded hydrotalcites employing in situ DXAS. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.12.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Figueroa SJ, Requejo FG, Lede E, Lamaita L, Peluso MA, Sambeth JE. XANES study of electronic and structural nature of Mn-sites in manganese oxides with catalytic properties. Catal Today 2005. [DOI: 10.1016/j.cattod.2005.07.156] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Requejo F, Ramallo-López J, Rosas-Salas R, Domínguez J, Rodriguez J, Kim JY, Quijada R. XANES/EXAFS study and catalytic properties of the confined Cr carbonyl–MCM-41 system. Catal Today 2005. [DOI: 10.1016/j.cattod.2005.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Glatzel P, Bergmann U. High resolution 1s core hole X-ray spectroscopy in 3d transition metal complexes—electronic and structural information. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.04.011] [Citation(s) in RCA: 519] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ramallo-López JM, Lede EJ, Requejo FG, Rodriguez JA, Kim JY, Rosas-Salas R, Domínguez JM. XANES Characterization of Extremely Nanosized Metal-Carbonyl Subspecies (Me = Cr, Mn, Fe, and Co) Confined into the Mesopores of MCM-41 Materials. J Phys Chem B 2004. [DOI: 10.1021/jp049241+] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fernández-García M. XANES analysis of catalytic systems under reaction conditions. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2002. [DOI: 10.1081/cr-120001459] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hoffmann MM, Darab JG, Fulton JL. An Infrared and X-ray Absorption Study of the Structure and Equilibrium of Chromate, Bichromate, and Dichromate in High-Temperature Aqueous Solutions. J Phys Chem A 2001. [DOI: 10.1021/jp0104740] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Markus M. Hoffmann
- Fundamental Sciences Division and Energy Sciences and Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John G. Darab
- Fundamental Sciences Division and Energy Sciences and Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John L. Fulton
- Fundamental Sciences Division and Energy Sciences and Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
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Hoffmann MM, Darab JG, Fulton JL. An Infrared and X-ray Absorption Study of the Equilibria and Structures of Chromate, Bichromate, and Dichromate in Ambient Aqueous Solutions. J Phys Chem A 2001. [DOI: 10.1021/jp0027041] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Markus M. Hoffmann
- Fundamental Sciences Division, and Energy Science & Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John G. Darab
- Fundamental Sciences Division, and Energy Science & Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - John L. Fulton
- Fundamental Sciences Division, and Energy Science & Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99352
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Simulating the oxygen K-edge spectrum from grain boundaries in ceramic oxides using the multiple scattering methodology. Micron 2000; 31:381-99. [PMID: 10741609 DOI: 10.1016/s0968-4328(99)00117-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In this paper we demonstrate the use of the multiple scattering methodology to interpret oxygen K-edge spectra from both the bulk and grain boundaries in a variety of ceramic oxides. The experimental electron energy loss spectra (EELS) used in this study, were obtained from a dedicated scanning transmission electron microscope (STEM). Using the STEM to obtain the spectra has the advantage that each spectrum can be acquired with atomic spatial resolution. While the energy resolution is limited to approximately 0.8 eV, and the angular integration in the microscope apertures precludes momentum resolved spectroscopy, this unprecedented spatial resolution allows the electronic structure at individual defect sites to be determined. Additionally, as the microscope can also provide an atomic resolution image of the defect, the relationship between the atomic structure of the defect and its local electronic structure can be determined. In practice, this is achieved by using the structure observed in the image to build the real space atomic cluster for multiple scattering simulations. Detailed interpretation of the simulations of oxygen K-edge spectra from bulk MgO, CaO, SrTiO3, TiO2, MnO2, Mn3O4, Mn2O3 and MnO are presented. In addition, the simulations from grain boundaries in TiO2 (undoped) and SrTiO3 (undoped and Mn doped) are discussed in relation to quantifying the changes in the local electronic structure that are a direct consequence of the defect structure. The simulations are used to make interpretations of the structure-property relationships at these grain boundaries.
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Jacob KT, Abraham KP. Phase relations in the system Sr-Cr-O and thermodynamic properties of SrCrO4 and Sr3Cr2O8. ACTA ACUST UNITED AC 2000. [DOI: 10.1361/105497100770340417] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Bergmann U, Glatzel P, deGroot F, Cramer SP. High Resolution K Capture X-ray Fluorescence Spectroscopy: A New Tool for Chemical Characterization. J Am Chem Soc 1999. [DOI: 10.1021/ja984454w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- U. Bergmann
- Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, California 94720 Department of Applied Science University of California Davis, California 95616 Department of Chemistry Universiteit Utrecht 3584 CA Utrecht, The Netherlands
| | - P. Glatzel
- Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, California 94720 Department of Applied Science University of California Davis, California 95616 Department of Chemistry Universiteit Utrecht 3584 CA Utrecht, The Netherlands
| | - F. deGroot
- Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, California 94720 Department of Applied Science University of California Davis, California 95616 Department of Chemistry Universiteit Utrecht 3584 CA Utrecht, The Netherlands
| | - S. P. Cramer
- Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, California 94720 Department of Applied Science University of California Davis, California 95616 Department of Chemistry Universiteit Utrecht 3584 CA Utrecht, The Netherlands
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Solera JA, García J, Proietti MG. Multielectron excitations at the L edges in rare-earth ionic aqueous solutions. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:2678-2686. [PMID: 9979038 DOI: 10.1103/physrevb.51.2678] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chaboy J, Marcelli A, Tyson TA. Influence of double-electron transitions on the EXAFS L edges of rare-earth systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11652-11661. [PMID: 10010031 DOI: 10.1103/physrevb.49.11652] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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30
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Hudson E, Moler E, Zheng Y, Kellar S, Heimann P, Hussain Z, Shirley DA. Near-edge sodium and fluorine K-shell photoabsorption of alkali halides. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3701-3708. [PMID: 10011259 DOI: 10.1103/physrevb.49.3701] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Soldatov AV, Ivanchenko TS, Bianconi A. Two-electron excitations and one-electron multiple-scattering resonances in the x-ray absorption of solid neon. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:16155-16161. [PMID: 10006036 DOI: 10.1103/physrevb.47.16155] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dartyge E, Fontaine A, Giorgetti C, Pizzini S, Baudelet F, Krill G, Brouder C, Kappler J. Multielectron excitations in rare-earth compounds revealed by magnetic circular x-ray dichroism. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:3155-3158. [PMID: 10004022 DOI: 10.1103/physrevb.46.3155] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Li G, Bridges F, Brown GS. Multielectron x-ray photoexcitation observations in x-ray-absorption fine-structure background. PHYSICAL REVIEW LETTERS 1992; 68:1609-1612. [PMID: 10045175 DOI: 10.1103/physrevlett.68.1609] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bianconi A, Li C, Pompa M, Congiu-Castellano A, Udron D, Flank AM, Lagarde P. Linearly polarized Cu L3-edge x-ray-absorption near-edge structure of Bi2CaSr2Cu2O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:10126-10138. [PMID: 9999017 DOI: 10.1103/physrevb.44.10126] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bianconi A, Li C, Campanella F, Longa SD, Pettiti I, Pompa M, Turtù S, Udron D. Cu K-edge polarized x-ray-absorption near-edge structure of Bi2CaSr2Cu2O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:4560-4569. [PMID: 10000111 DOI: 10.1103/physrevb.44.4560] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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