The first experimental results from the 04BM (PEEM/XAS) beamline at Solaris

Zając, M.; Giela, Tomasz; Freindl, K.; Kollbek, Kamila; Korecki, J.; Madej, Ewa; Pitala, Krzysztof; Kozioł–Rachwał, A.; Sikora, Marcin; Spiridis, N.; Stȩpień, Joanna; Szkudlarek, Aleksandra; Ślęzak, M.; Ślęzak, T.; Wilgocka-Ślęzak, D.

doi:10.1016/j.nimb.2020.12.024

Cited by 55 publications

(32 citation statements)

References 13 publications

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“…The band at 1020 cm −1 is described in the literature as the band corresponding to B-C bond vibrations. This hypothesis was confirmed by previous research on spectral analysis based on the analysis of the position of band corresponding to the B-C vibrations present in covalent organic frameworks [ 22 ] and amorphous boron carbide [ 16 , 19 ]. The increase in boron content in the precursor sample caused a significant increase in the intensity of bands characteristic for B-O and B-OH bond vibrations.…”

Section: Resultssupporting

confidence: 80%

“…To analyze the local structure in the near-surface region of the obtained precursors, both pyrolyzed and synthesized at 1700 °C, X-ray absorption spectroscopy (XAS) in total electron yield (TEY) detection mode was used. The measurements were performed using the PEEM/XAS beamline of the Solaris National Synchrotron Radiation Centre, Cracow, Poland [ 19 ]. PEEM/XAS beamline is a bending magnet-based beamline, providing the soft X-ray energy range (150 to 2000 eV) and equipped with plane grating monochromator of resolving power, E/ΔE > 4000.…”

Section: Methodsmentioning

confidence: 99%

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Surface Properties and Morphology of Boron Carbide Nanopowders Obtained by Lyophilization of Saccharide Precursors

et al. 2021

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The powders of boron carbide are usually synthesized by the carbothermal reduction of boron oxide. As an alternative to high-temperature reactions, the development of the carbothermal reduction of organic precursors to produce B4C is receiving considerable interest. The aim of this work was to compare two methods of preparing different saccharide precursors mixed with boric acid with a molar ratio of boron to carbon of 1:9 for the synthesis of B4C. In the first method, aqueous solutions of saccharides and boric acid were dried overnight at 90 °C and pyrolyzed at 850 °C for 1 h under argon flow. In the second method, aqueous solutions of different saccharides and boric acid were freeze-dried and prepared in the same way as in the first method. Precursors from both methods were heat-treated at temperatures of 1300 to 1700 °C. The amount of boron carbide in the powders depends on the saccharides, the temperature of synthesis, and the method of precursor preparation.

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Section: Resultssupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Surface Properties and Morphology of Boron Carbide Nanopowders Obtained by Lyophilization of Saccharide Precursors

et al. 2021

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“…Recent years have witnessed application of NEXAFS to diverse systems, ranging from bulk crystals [43] to mono-layer sheets [44,45] and chemisorbed atoms and molecules at a surface [46]. Being indispensable for condensed-matter physics/chemistry and surface science, NEXAFS has now been developed into a new direction to combine with nano-scale imaging and operando experiments [47][48][49], which will allow us, for example, to optimize functionalities of molecular nano-devices.…”

Section: Near-edge X-ray Absorption Fine Structurementioning

confidence: 99%

“…An SCU has also advantage to keep a position of the light source during the polarization control. This important property of the light source makes the stable beam positioning at the beamline and the good compatibility with recent techniques of nano-focusing, spatial imaging, and spectromicroscopy [47][48][49]. Furthermore, the measurements can additionally be high-sensitive by combining with the lock-in amplification techniques by introducing the defined current into an electromagnetic coil in PS [29,31].…”

Section: Advanced Experimentsmentioning

confidence: 99%

Fast and versatile polarization control of X-ray by segmented cross undulator at SPring-8

et al. 2021

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An X-ray is the well-known probe to examine structure of materials, including our own bodies. The X-ray beam, especially at the wavelength of nanometers, has also become significant to directly investigate electronic states of a sample. Such an X-ray is called a soft X-ray and polarization dependence of the light-matter interaction further unveils the microscopic properties, such as orbitals or spins of electrons. Generation of high brilliant beams of the polarized X-ray has linked to development of our experimental science, and it has been made by radiation from relativistic electrons at the synchrotron radiation facilities over the world. Recently, we constructed a new polarization-controlled X-ray source, the segmented cross undulator, at SPring-8, the largest synchrotron radiation facility in the world. The operation is based on interference of X-ray beams, which is sharply contrast to the conventional method of regulating electron trajectory by the mechanical control of magnets. The paradigm shift opened the measurement innovations and allowed us to design new experimental approaches to capture signals that have been hidden in materials. The present review describes the novel X-ray source with the principle of operation and the technical details of optimization. Examples of the frontier spectroscopies that use unique optical properties of the source are introduced, followed by the future prospects for next generation synchrotron radiation facilities.

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“…The sequence of the structures was studied employing EXAFS at the 04BM beamline at the National Synchrotron Radiation Centre SOLARIS [63]. The total electron yield (TEY) mode was used allowing for a depth of sampling of a few nanometres.…”

Section: X-ray Spectroscopymentioning

confidence: 99%

Structural Studies of Aluminated form of Zeolites—EXAFS and XRD Experiment, STEM Micrography, and DFT Modelling

et al. 2021

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In this article, the results of computational structural studies on Al-containing zeolites, via periodic DFT + D modelling and FDM (Finite Difference Method) to solve the Schrödinger equation (FDMNES) for XAS simulations, corroborated by EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy and PXRD (powder X-ray diffractometry), are presented. The applicability of Radial Distribution Function (RDF) to screen out the postulated zeolite structure is also discussed. The structural conclusions are further verified by HR-TEM imaging.

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The first experimental results from the 04BM (PEEM/XAS) beamline at Solaris

Cited by 55 publications

References 13 publications

Surface Properties and Morphology of Boron Carbide Nanopowders Obtained by Lyophilization of Saccharide Precursors

Surface Properties and Morphology of Boron Carbide Nanopowders Obtained by Lyophilization of Saccharide Precursors

Fast and versatile polarization control of X-ray by segmented cross undulator at SPring-8

Structural Studies of Aluminated form of Zeolites—EXAFS and XRD Experiment, STEM Micrography, and DFT Modelling

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