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Journal articles on the topic 'Reference-free X-ray fluorescence'

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Author: Grafiati

Published: 14 March 2023

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1

Wählisch, André, Cornelia Streeck, Philipp Hönicke, and Burkhard Beckhoff. "Validation of secondary fluorescence excitation in quantitative X-ray fluorescence analysis of thin alloy films." Journal of Analytical Atomic Spectrometry 35, no. 8 (2020): 1664–70. http://dx.doi.org/10.1039/d0ja00171f.

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2

Beckhoff, B., M. Kolbe, O. Hahn, A. G. Karydas, Ch Zarkadas, D. Sokaras, and M. Mantler. "Reference-free x-ray fluorescence analysis of an ancient Chinese ceramic." X-Ray Spectrometry 37, no. 4 (July 2008): 462–65. http://dx.doi.org/10.1002/xrs.1073.

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3

Unterumsberger, Rainer, Philipp Hönicke, Yves Kayser, Beatrix Pollakowski-Herrmann, Saeed Gholhaki, Quanmin Guo, Richard E. Palmer, and Burkhard Beckhoff. "Interaction of nanoparticle properties and X-ray analytical techniques." Journal of Analytical Atomic Spectrometry 35, no. 5 (2020): 1022–33. http://dx.doi.org/10.1039/d0ja00049c.

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In this work, Pt–Ti core–shell nanoparticles were characterized using reference-free X-ray fluorescence analysis and used for the investigation of the modification of the X-Ray Standing Wave (XSW) field intensity with increasing NP surface coverage.

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4

Unterumsberger, Rainer, Philipp Hönicke, Julien L. Colaux, Chris Jeynes, Malte Wansleben, Matthias Müller, and Burkhard Beckhoff. "Accurate experimental determination of gallium K- and L3-shell XRF fundamental parameters." Journal of Analytical Atomic Spectrometry 33, no. 6 (2018): 1003–13. http://dx.doi.org/10.1039/c8ja00046h.

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The fluorescence yield of the K- and L3-shell of gallium was determined using the radiometrically calibrated (reference-free) X-ray fluorescence instrumentation at the BESSY II synchrotron radiation facility.

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5

Soltwisch, Victor, Philipp Hönicke, Yves Kayser, Janis Eilbracht, Jürgen Probst, Frank Scholze, and Burkhard Beckhoff. "Element sensitive reconstruction of nanostructured surfaces with finite elements and grazing incidence soft X-ray fluorescence." Nanoscale 10, no. 13 (2018): 6177–85. http://dx.doi.org/10.1039/c8nr00328a.

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6

Cara, Eleonora, Luisa Mandrile, Alessio Sacco, Andrea M. Giovannozzi, Andrea M. Rossi, Federica Celegato, Natascia De Leo, et al. "Towards a traceable enhancement factor in surface-enhanced Raman spectroscopy." Journal of Materials Chemistry C 8, no. 46 (2020): 16513–19. http://dx.doi.org/10.1039/d0tc04364h.

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7

Kolbe, Michael, Burkhard Beckhoff, Michael Krumrey, and Gerhard Ulm. "Comparison of reference-free X-ray fluorescence analysis and X-ray reflectometry for thickness determination in the nanometer range." Applied Surface Science 252, no. 1 (September 2005): 49–52. http://dx.doi.org/10.1016/j.apsusc.2005.01.112.

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8

Beckhoff, Burkhard, Rolf Fliegauf, Michael Kolbe, Matthias Müller, Jan Weser, and Gerhard Ulm. "Reference-Free Total Reflection X-ray Fluorescence Analysis of Semiconductor Surfaces with Synchrotron Radiation." Analytical Chemistry 79, no. 20 (October 2007): 7873–82. http://dx.doi.org/10.1021/ac071236p.

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9

Reinhardt, Falk, János Osán, Szabina Török, Andrea Edit Pap, Michael Kolbe, and Burkhard Beckhoff. "Reference-free quantification of particle-like surface contaminations by grazing incidence X-ray fluorescence analysis." J. Anal. At. Spectrom. 27, no. 2 (2012): 248–55. http://dx.doi.org/10.1039/c2ja10286b.

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10

Kolbe, M., B. Beckhoff, M. Krumrey, and G. Ulm. "F15 Thickness Determination of Copper and Nickel Nanolayers: Comparison of Completely Reference-Free X-ray Fluorescence Analysis and X-ray Reflectometry." Powder Diffraction 20, no. 2 (June 2005): 174. http://dx.doi.org/10.1154/1.1979030.

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11

Kolbe, Michael, Burkhard Beckhoff, Michael Krumrey, Michael A. Reading, Jaap Van den Berg, Thierry Conard, and Stefan De Gendt. "Characterisation of High-k Containing Nanolayers by Reference-Free X-Ray Fluorescence Analysis with Synchrotron Radiation." ECS Transactions 25, no. 3 (December 17, 2019): 293–300. http://dx.doi.org/10.1149/1.3204419.

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12

Kolbe, Michael, Burkhard Beckhoff, Michael Krumrey, and Gerhard Ulm. "Thickness determination for Cu and Ni nanolayers: Comparison of completely reference-free fundamental parameter-based X-ray fluorescence analysis and X-ray reflectometry." Spectrochimica Acta Part B: Atomic Spectroscopy 60, no. 4 (April 2005): 505–10. http://dx.doi.org/10.1016/j.sab.2005.03.018.

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13

Noro, Junji, Takashi Korenaga, Masaru Kozaki, Satoshi Kawada, Kazuhiko Kurusu, Manabu Mizuhira, Akihiro Ono, et al. "Development of Lead-Free Solder Alloy Certified Reference Materials (JSAC 0131-0134) for X-Ray Fluorescence Analysis." BUNSEKI KAGAKU 59, no. 2 (2010): 107–16. http://dx.doi.org/10.2116/bunsekikagaku.59.107.

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14

Hönicke, Philipp, Ina Holfelder, Michael Kolbe, Janin Lubeck, Beatrix Pollakowski-Herrmann, Rainer Unterumsberger, Jan Weser, and Burkhard Beckhoff. "Determination of SiO2and C layers on a monocrystalline silicon sphere by reference-free x-ray fluorescence analysis." Metrologia 54, no. 4 (June 28, 2017): 481–86. http://dx.doi.org/10.1088/1681-7575/aa765f.

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15

Hönicke, Philipp, Blanka Detlefs, Matthias Müller, Erik Darlatt, Emmanuel Nolot, Helen Grampeix, and Burkhard Beckhoff. "Reference-free, depth-dependent characterization of nanolayers and gradient systems with advanced grazing incidence X-ray fluorescence analysis." physica status solidi (a) 212, no. 3 (February 4, 2015): 523–28. http://dx.doi.org/10.1002/pssa.201400204.

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16

Streeck, C., B. Beckhoff, F. Reinhardt, M. Kolbe, B. Kanngießer, C. A. Kaufmann, and H. W. Schock. "Elemental depth profiling of Cu(In,Ga)Se2 thin films by reference-free grazing incidence X-ray fluorescence analysis." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 268, no. 3-4 (February 2010): 277–81. http://dx.doi.org/10.1016/j.nimb.2009.09.051.

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17

Lopez-Astacio, Hiram J., Lisandro Cunci, and Christopher Pollock. "Development and Improvement of an Electrochemical Cell for X-Ray Fluorescence and Absorption Spectroscopy." ECS Meeting Abstracts MA2022-02, no. 60 (October 9, 2022): 2472. http://dx.doi.org/10.1149/ma2022-02602472mtgabs.

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The use of X-ray spectroscopy is an essential technique for the study of any material. Our research investigated the electrochemical cell design and improvement for X-ray absorption and fluorescence spectroscopy. Our objective was to improve the design capability of the current electrochemical cell design to perform absorption and fluorescence spectroscopy at once. By changing the geometry of the receiving window on the electrochemical cell, we could accomplish both fluorescence and absorption spectroscopy functions for CHEXS experiments. Our approach was a simple, inexpensive prototype cycle that anyone could use. Using a hobbyist Computer Numerical Control (CNC) and free 3D CAD software, anyone can develop a reliable electrochemical cell using our design. The electrochemical cell was fabricated using a small computer numerical control system, which allowed a fast turnaround for our project. Our work contributed to designing an open-source electrochemical cell that CHESS or any user could use, modify and share for future projects. Scientifically, we aimed to implement the ability to do both fluorescence and absorption spectroscopy, incorporate the ability to purge the cell with a gas, decrease ionic resistance in the cell to have all the electrodes within the same cell, and avoid leaks. The development of a new electrochemical cell design was made to improve the reliability and performance of the cell for CHESS experiments. By re-arranging the positions of the working electrode (WE), counter electrode (CE), and reference electrode (RE), we accomplished low ionic resistance within the cell. In addition, creating a 45-degree angle slope on both sides of the X-ray receiving window will allow the design of the electrochemical cell to perform fluorescence and absorption spectroscopy simultaneously. Furthermore, an add-on to the top of the electrochemical cell was designed to perform gas purging of the cell successfully. Lastly, the change from an o-ring to a gasket addressed the leakage problem thoroughly.

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18

Hönicke, Philipp, Blanka Detlefs, Emmanuel Nolot, Yves Kayser, Uwe Mühle, Beatrix Pollakowski, and Burkhard Beckhoff. "Reference-free grazing incidence x-ray fluorescence and reflectometry as a methodology for independent validation of x-ray reflectometry on ultrathin layer stacks and a depth-dependent characterization." Journal of Vacuum Science & Technology A 37, no. 4 (July 2019): 041502. http://dx.doi.org/10.1116/1.5094891.

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19

Wendeln, Christian, Edith Steinhäuser, Lutz Stamp, Bexy Dosse-Gomez, Elisa Langhammer, Sebastian Reiber, Sebastian Dünnebeil, and Sandra Röseler. "Novel formaldehyde-free electroless copper for plating on next-generation substrates." International Symposium on Microelectronics 2018, no. 1 (October 1, 2018): 000628–33. http://dx.doi.org/10.4071/2380-4505-2018.1.000628.

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Abstract This work describes a new type of formaldehyde-free electroless copper electrolyte that can be used for a broad set of applications and materials, especially for the processing of next-generation substrates. The plating solution was successfully applied in both, a laboratory and production-scale environment. The results have been evaluated in detail and were benchmarked against a formaldehyde-based reference. A characterization of the obtained metal films was carried out by different analytical techniques, including microscopy, X-ray fluorescence (XRF), scanning electron microscopy (SEM), adhesion tests and non-blister verification. Additionally, studies concerning chemical bath stability, throwing power and electrical reliability have been made. Based on the obtained data we believe that the current achievements represent a suitable technology to replace formaldehyde in existing printed circuit board (PCB) production without loss of process performance and thus provide a sustainable “green” alternative to the industry.

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20

Demirsar Arli, Belgin, Gulsu Simsek Franci, Sennur Kaya, Hakan Arli, and Philippe Colomban. "Portable X-ray Fluorescence (p-XRF) Uncertainty Estimation for Glazed Ceramic Analysis: Case of Iznik Tiles." Heritage 3, no. 4 (November 10, 2020): 1302–29. http://dx.doi.org/10.3390/heritage3040072.

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The aim of this study is to estimate the uncertainty of a portable X-ray fluorescence (p-XRF) instrument for the (semi-quantitative) analyses of tiles with underglaze decoration. Before starting the campaign of on-site measurements, the optimum acquisition time and the most accurate calibration mode were selected. For this purpose, the elemental composition of two glass standards of NIST (SRM610 and SRM612) and a Corning A standard were measured with varied times (5–360 s) and in different calibration modes (Mining, Mining Light Elements, Soil, and Rare Earth Elements). Afterwards, a set of blue-and-white tiles that was unearthed at Iznik Tile Kilns Excavation between the dig seasons of 2015 and 2019 was examined with p-XRF by selecting ten points of measure from each layer (body, transparent glaze, and blue coloured areas). The elemental composition of different layers was evaluated by means of the intragroup and intergroup data. They were also compared to the previous studies and found that the corrosion-free, homogeneous, and non-porous surfaces decrease the relative standard deviation (RSD) by increasing the consistency of the compositional data. The major elements found in the matrix of each layer (Al and Si for the body, Pb and Sn for the glaze) have the lowest value of RSD, as expected. However, the comparison of the data with the analysis of the reference materials showed that the content of Mg and also Si, which belong to the low-Z elements group, is shifted relatively towards the higher compositional values. The impossibility of measuring the elemental composition of sodium does not hinder the classification of the samples. Although the transition metals have very low concentrations, p-XRF measurements appear rather consistent and the intrinsic scattering of the data observed for a single artefact is largely smaller than those observed for the tiles of different historical buildings. Thus, it allows the classification to be made related to the different techniques used.

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21

Affoué Delphine KOUASSI, Fatou Diane Micheline BAGUIA-BROUNE, Kohué Christelle Chantal N’GAMAN-KOUASSI, Janat Akhanovna MAMYRBEKOVA-BEKRO, and Yves-Alain BEKRO. "Mineral and phenolic compositions, antioxidant activity and GC-MS analysis of the leaves of Anchomanes difformis (Blume) Engl. from Côte d’Ivoire." GSC Advanced Research and Reviews 10, no. 1 (January 30, 2022): 145–55. http://dx.doi.org/10.30574/gscarr.2022.10.1.0035.

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The main objective of this study is to contribute to the valuation of Anchomanes difformis, a plant whose leaves are used for its oxytocic effect at the end of pregnancy and its use in the treatment of rheumatism in Côte d'Ivoire. The X-ray fluorescence spectrometer assay showed that the leaves of Anchomanes difformis contain (mg / 100g): K / 2061; P / 315.2; Ca / 1268; Na / 206.9; Mg / 653.8; Fe / 116.4; Cu / 0.79; Zn / 10.03 and Mn / 68.59. The quantitative spectrophotometric analysis of the phenolic compounds of the hydromethanolic crude extract of the leaves made it possible to determine the contents of total polyphenols (6.12 mg EAG / g), total flavonoids (mg EC / g), condensed tannins (0.637%) and hydrolyzable (0.312%). The evaluation of the antioxidant activity, measured by spectrophotometry against the stable free radical DPPH, revealed that the study extract (0.598 mg / ml) is less effective than vitamin C (0.032 mg / ml) taken as a reference. GC-MS analysis of the hydromethanolic extract revealed the existence of several phenolic compounds, the presence of which would be responsible for the therapeutic virtues of the leaves of Anchomanes difformis.

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22

Somlyo, A. P. "Where Art Thou, Calcium?" Microscopy and Microanalysis 3, S2 (August 1997): 913–14. http://dx.doi.org/10.1017/s1431927600011454.

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Ever since the recognition of calcium as a major intracellular messenger of signal transduction, its subcellular localization and intracellular movements have been intensively sought through electron and light optical methods. Electron probe microanalysis (EPMA), X-ray mapping, electron energy-loss spectroscopy (EELS) and energy-filtered imaging still provide the highest spatial resolution for measuring total calcium, whereas with light optical methods (fluorescent, luminescent and absorbance dyes) free [Ca2+]i can be measured with high sensitivity and time resolution. This presentation will summarize the relationship, whether collision or convergence, between the results of electron and light optical methods, with particular reference to mitochondrial Ca, and consider the potential for further improvements in detection sensitivity and spatial resolution.Sarcoplasmic and endoplasmic reticulum: Early attempts to quantitate Ca in cellular organelles with EPMA were directed at the sarcoplasmic reticulum (SR) of skeletal muscle, where EPMA could also address questions not amenable to studies of isolated SR.

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23

Sichov, Mikhail, Kostiantyn Boriak, and Leonid Kolomiets. "Technology for obtaining high-pure magnesium compounds using the hydrolytic processes of sedimentation." Eastern-European Journal of Enterprise Technologies 1, no. 6(115) (February 28, 2022): 43–52. http://dx.doi.org/10.15587/1729-4061.2022.253544.

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In nature, magnesium compounds are distributed in the form of such minerals as dolomite, magnesite, serpentinite, brucite, and in the form of such solutions as sea and ocean waters, salt lakes, bischofite. The main popular magnesium compounds are its chloride, hydroxide, and oxide. The most common technology for obtaining magnesium hydroxide is based on the action of alkaline reagents on solutions of magnesium. However, the technology has significant drawbacks. The main issue is that magnesium hydroxide cannot be obtained free of impurity metal ions, and the sediment itself has an extremely low filtration rate from the solution in which it is formed. Magnesium hydroxide is an excellent sorbent collector for the ions of most metals, so it is possible to utilize this property of absorption of magnesium hydroxide to produce other highly pure compounds, for medicine and pharmacopeia. This paper investigates the processes of alkaline hydrolysis of magnesium chloride and the formation of magnesium hydroxide sediment, the kinetics of processes, as well as the properties of sediments. Empirical formulas for sediment production parameters with a high filtration coefficient that exceeds the known values of 1·106have been derived. The study reported here hasrevealed the possibility of obtaining in a relatively simple way highly pure chloride, hydroxide, and magnesium oxide, sodium chlorides, potassium, calcium, in which the impurity 3d metals content does not exceed the value as a percentage of (1‒4)·10-7. Due to the properties of highly pure magnesium compounds to the sorption of metal ions, it is possible to create reference samples of chemical elements for the needs of metrology. For example, to create MR phantoms to verify measurements and check the operation of magnetic resonance imaging (MRI) in medical institutions. Especially pure magnesium hydroxide can be used for instrumental methods of analytical chemistry (X-ray fluorescent, neutron-activation methods) when fabricating chemical references for testing laboratories.

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24

Ménesguen, Yves, and Marie-Christine Lépy. "Reference‐Free Combined X‐Ray Reflectometry−Grazing Incidence X‐Ray Fluorescence at the French Synchrotron SOLEIL." physica status solidi (a), August 8, 2021, 2100423. http://dx.doi.org/10.1002/pssa.202100423.

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25

"Nanolayer Characterisation by Reference-free X-ray Fluorescence Analysis with Synchrotron Radiation." ECS Meeting Abstracts, 2009. http://dx.doi.org/10.1149/ma2009-02/22/1975.

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26

Zech, Claudia, Marco Evertz, Markus Börner, Yves Kayser, Philipp Hönicke, Martin Winter, Sascha Nowak, and Burkhard Beckhoff. "Quantitative manganese dissolution investigation in lithium-ion batteries by means of X-ray spectrometry techniques." Journal of Analytical Atomic Spectrometry, 2021. http://dx.doi.org/10.1039/d0ja00491j.

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The manganese deposition of an aged anode has been investigated with K-edge and L-edge NEXAFS to determine the manganese species. In addition, the absolute amount of manganese could be revealed with reference-free X-ray fluorescence analysis.

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27

Tack, Pieter, Ella De Pauw, Beverley Tkalcec, Miles Lindner, Benjamin Bazi, Bart Vekemans, Frank Brenker, et al. "Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission." Earth, Planets and Space 74, no. 1 (September 28, 2022). http://dx.doi.org/10.1186/s40623-022-01705-3.

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AbstractMillimetre-sized primordial rock fragments originating from asteroid Ryugu were investigated using high energy X-ray fluorescence spectroscopy, providing 2D and 3D elemental distribution and quantitative composition information on the microscopic level. Samples were collected in two phases from two sites on asteroid Ryugu and safely returned to Earth by JAXA’s asteroid explorer Hayabusa2, during which time the collected material was stored and maintained free from terrestrial influences, including exposure to Earth’s atmosphere. Several grains of interest were identified and further characterised to obtain quantitative information on the rare earth element (REE) content within said grains, following a reference-based and computed-tomography-assisted fundamental parameters quantification approach. Several orders of magnitude REE enrichments compared to the mean CI chondrite composition were found within grains that could be identified as apatite phase. Small enrichment of LREE was found for dolomite grains and slight enrichment or depletion for the general matrices within the Ryugu rock fragments A0055 and C0076, respectively. Graphical Abstract

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28

Jones, Cerys, Nathan S. Daly, Catherine Higgitt, and Miguel R. D. Rodrigues. "Neural network-based classification of X-ray fluorescence spectra of artists’ pigments: an approach leveraging a synthetic dataset created using the fundamental parameters method." Heritage Science 10, no. 1 (June 13, 2022). http://dx.doi.org/10.1186/s40494-022-00716-3.

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AbstractX-ray fluorescence (XRF) spectroscopy is an analytical technique used to identify chemical elements that has found widespread use in the cultural heritage sector to characterise artists' materials including the pigments in paintings. It generates a spectrum with characteristic emission lines relating to the elements present, which is interpreted by an expert to understand the materials therein. Convolutional neural networks (CNNs) are an effective method for automating such classification tasks—an increasingly important feature as XRF datasets continue to grow in size—but they require large libraries that capture the natural variation of each class for training. As an alternative to having to acquire such a large library of XRF spectra of artists' materials a physical model, the Fundamental Parameters (FP) method, was used to generate a synthetic dataset of XRF spectra representative of pigments typically encountered in Renaissance paintings that could then be used to train a neural network. The synthetic spectra generated—modelled as single layers of individual pigments—had characteristic element lines closely matching those found in real XRF spectra. However, as the method did not incorporate effects from the X-ray source, the synthetic spectra lacked the continuum and Rayleigh and Compton scatter peaks. Nevertheless, the network trained on the synthetic dataset achieved 100% accuracy when tested on synthetic XRF data. Whilst this initial network only attained 55% accuracy when tested on real XRF spectra obtained from reference samples, applying transfer learning using a small quantity of such real XRF spectra increased the accuracy to 96%. Due to these promising results, the network was also tested on select data acquired during macro XRF (MA-XRF) scanning of a painting to challenge the model with noisier spectra Although only tested on spectra from relatively simple paint passages, the results obtained suggest that the FP method can be used to create accurate synthetic XRF spectra of individual artists' pigments, free from X-ray tube effects, on which a classification model could be trained for application to real XRF data and that the method has potential to be extended to deal with more complex paint mixtures and stratigraphies.

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