Xanes Specroscopic Diagnostics of the 3D Local Atomic Structure of Nanostructured Materials

Kravtsova, A. N.; Guda, L. V.; Polozhentsev, O. E.; Панкин, И. А.; Soldatov, A. V.

doi:10.1134/s0022476618070259

Cited by 5 publications

(2 citation statements)

References 100 publications

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“…However, the determination of a complete three-dimensional local atomic structure of a material without long-range order in the arrangement of atoms requires complex theoretical calculations using supercomputers [ 42 ]. Application of both XANES and EXAFS methods makes it possible to thoroughly study the local atomic structure and phase composition of the nanoparticles [ 43 , 44 ].…”

Section: Spectroscopic Methods For Spion Local Atomic Structure Stmentioning

confidence: 99%

The Local Atomic Structure of Colloidal Superparamagnetic Iron Oxide Nanoparticles for Theranostics in Oncology

2018

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The paper contains an overview of modern spectroscopic methods for studying the local atomic structure of superparamagnetic nanoparticles based on iron oxide (SPIONs), which are an important class of materials promising for theranostics in oncology. Practically important properties of small and ultra small nanoparticles are determined primarily by their shape, size, and features of the local atomic, electronic, and magnetic structures, for the study of which the standard characterization methods developed for macroscopic materials are not optimal. The paper analyzes results of the studies of SPIONs local atomic structure carried out by X-ray absorption spectroscopy at synchrotron radiation sources and Mössbauer spectroscopy during the last decade.

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Section: Spectroscopic Methods For Spion Local Atomic Structure Stmentioning

confidence: 99%

The Local Atomic Structure of Colloidal Superparamagnetic Iron Oxide Nanoparticles for Theranostics in Oncology

2018

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“…XAS comprises extended X-ray absorption near-edge structure (EXAFS) and X-ray absorption near-edge structure (XANES) spectroscopies. EXAFS allows determining coordination numbers and interatomic distances in materials under study, while XANES (Kravtsova et al, 2018) contains information on the local electronic structure (in particular, oxidation states of atoms, densities of unoccupied electronic states near the bottom of conduction band), and full 3-D atomic geometry (interatomic distances and bond angles) around a specific type of atoms. Recently, XAS has been successfully used to investigate details of the atomic and electronic structures of different types of geological materials (Berry et al, 2017;Dyar, McCanta, et al, 2016;Kravtsova et al, 2016;Rodina et al, 2013) and impact rocks (Giuli et al, 2002;Kravtsova et al, 2020;Wang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Complex diagnostics of ordinary chondrites Markovka, Polujamki, Sayh al Uhaymir 001, Dhofar 020, and Jiddat al Harasis 055 by X‐ray techniques and Mössbauer spectroscopy

Guda

Kravtsova

Кубрин

et al. 2021

Meteorit & Planetary Scien

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Micro X-ray fluorescence (XRF) analysis, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and M€ ossbauer and X-ray absorption near-edge structure (XANES) spectroscopies have been used to study the element and phase composition, and Fe and Ni oxidation states in ordinary chondrites. The meteorites have been initially classified as Markovka (H4 type), Polujamki (H4 type), Sayh al Uhaymir (SaU) 001 (L5 type), Dhofar (Dho) 020 (H4/5 type), and Jiddat al Harasis (JaH) 055 (L4-5 type). We have applied a set of spectroscopic methods to characterize and quantify the differences between samples. While the concentration of Fe in the meteorites is in agreement with the qualitative assignment of their types (L or H) made upon discovery, we observed extremely low Mg/Si and Al/Si values compared to the data published by Palme et al. (2014). Phase content of the meteorites has been studied by means of XRD, as well as by SEM and EDX. M€ ossbauer spectroscopy of Fe-containing phases has determined that Fe ions are present mainly in olivine and pyroxene phases in all studied samples. Goethite, hematite, and troilite phases were found in Markovka, Polujamki, and Sayh al Uhaymir 001, respectively. Markovka and Polujamki samples contained the largest concentration of Fe-Ni-Co metal grains. Fe and Ni K-XANES spectra were analyzed to estimate metal oxidation state in the chondrites and compared with the M€ ossbauer data. The multispectral data acquired in the present work are of importance for further understanding of meteoritic processes.

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Advanced Surface Characterization Techniques in Nano- and Biomaterials

Zamora

Gutiérrez‐Cerón

Fernandes

et al. 2019

Nanoengineering Materials for Biomedical Uses

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Xanes Specroscopic Diagnostics of the 3D Local Atomic Structure of Nanostructured Materials

Cited by 5 publications

References 100 publications

The Local Atomic Structure of Colloidal Superparamagnetic Iron Oxide Nanoparticles for Theranostics in Oncology

The Local Atomic Structure of Colloidal Superparamagnetic Iron Oxide Nanoparticles for Theranostics in Oncology

Complex diagnostics of ordinary chondrites Markovka, Polujamki, Sayh al Uhaymir 001, Dhofar 020, and Jiddat al Harasis 055 by X‐ray techniques and Mössbauer spectroscopy

Advanced Surface Characterization Techniques in Nano- and Biomaterials

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