R. Tucoulou

European Synchrotron Radiation Facility

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Gema Martínez‐Criado

European Synchrotron Radiation Facility

Peter Cloetens

European Synchrotron Radiation Facility

ДВ

Д. В. Рощупкин

Institute of Microelectronics Technology and High Purity Materials

Julie Villanova

European Synchrotron Radiation Facility

J. Susini

Synchrotron soleil

M. Brunel

Unité de Recherche Œnologie

P. Bleuet

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

I.A. Schelokov

Institute of Microelectronics Technology and High Purity Materials

Alexandre Simionovici

Institut des Sciences de la Terre

Sylvain Bohic

European Synchrotron Radiation Facility

Cooperative Institutions

Centre National de la Recherche Scientifique

208

European Synchrotron Radiation Facility

166

Université Grenoble Alpes

106

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

CEA Grenoble

European Science Foundation

Université Joseph Fourier

Institut polytechnique de Grenoble

Deutsches Elektronen-Synchrotron DESY

Argonne National Laboratory

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Investigation of surface acoustic wave fields in silicon crystals by x-ray diffraction: A dynamical theory approach

Journal of Applied Physics (2005)

R. Tucoulou Olivier Mathon Claudio Ferrero Vito Mocella Д. В. Рощупкин

X-ray diffraction spectra at different x-ray energies from a Si crystal subjected to a deformation produced by surface acoustic wave propagation have been modeled using the general framework of dynamical diffraction theory. The simulations have been successfully compared with the corresponding experimental results confirming the accuracy of the elastic model describing the acoustic wave fields inside the crystal.

Crystal (programming language)

Diffraction topography

10.1063/1.1905778

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Citations (7)

Visualization of the Ionome in Planktonic Symbioses

Microscopy and Microanalysis (2019)

Johan Decelle Giulia Veronesi Benoît Gallet Hryhoriy Stryhanyuk Sophie Marro

Journal Article Visualization of the Ionome in Planktonic Symbioses Get access Johan Decelle, Johan Decelle Cell and Plant Physiology Laboratory – University of Grenoble Alpes, CNRS, CEA, INRA; Grenoble, France Corresponding author: johan.decelle@univ-grenoble-alpes.fr Search for other works by this author on: Oxford Academic Google Scholar Giulia Veronesi, Giulia Veronesi Laboratoire de Chimie et Biologie des Métaux - University of Grenoble Alpes, CNRS, CEA ; Grenoble, FranceESRF, The European Synchrotron Radiation Facility; Grenoble, France Search for other works by this author on: Oxford Academic Google Scholar Benoit Gallet, Benoit Gallet Institut de Biologie Structurale, University of Grenoble Alpes, CNRS, CEA; Grenoble, France Search for other works by this author on: Oxford Academic Google Scholar Hryhoriy Stryhanyuk, Hryhoriy Stryhanyuk Helmholtz Centre for Environmental Research – UFZ, Department of Isotope Biogeochemistry; Leipzig, Germany Search for other works by this author on: Oxford Academic Google Scholar Sophie Marro, Sophie Marro Sorbonne Universités, UPMC Université Paris 06, CNRS, Laboratoire d'Océanographie de Villefranche (LOV), Villefranche-sur-Mer, France Search for other works by this author on: Oxford Academic Google Scholar Rémi Tucoulou, Rémi Tucoulou ESRF, The European Synchrotron Radiation Facility; Grenoble, France Search for other works by this author on: Oxford Academic Google Scholar Niculina Musat Niculina Musat Helmholtz Centre for Environmental Research – UFZ, Department of Isotope Biogeochemistry; Leipzig, Germany Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 25, Issue S2, 1 August 2019, Pages 1074–1075, https://doi.org/10.1017/S143192761900610X Published: 01 August 2019

10.1017/s143192761900610x

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3D Quantification of Microstructural Properties of LiNi_0.5Mn_0.3Co_0.2O₂ High‐Energy Density Electrodes by X‐Ray Holographic Nano‐Tomography

Advanced Energy Materials (2021)

Tuan‐Tu Nguyen Julie Villanova Zeliang Su R. Tucoulou Benoît Fleutot

Abstract Despite significant progress in the field of tomography, capturing the carbon binder domain (CBD) morphology presented in the Li‐ion electrode remains challenging, due to its low attenuation coefficient. In this work, quantitative phase contrast X‐ray nano‐holotomography is used as a straightforward approach that provides a large reconstructed volume, where the CBD can be resolved along with the active materials and the pore space. As a result, a complete quantitative analysis of the microstructures of three LiNi 0.5 Mn 0.3 Co 0.2 O 2 high energy density electrodes, including the characterization of each phase separately along with the statistical quantification of their inter‐connectivity at particle scale, is performed. The microstructural heterogeneities are quantified and comparison between different electrodes is done. The results from this work suggest reasons for the negative impacts of the CBD excess on the electrode performance at high C‐rates. Those results are true in the case of high energy density electrodes, and are due to the reduction of the electrochemical active surface area. This sheds light on the optimization of the electrode design to improve the power rate of high energy density electrodes.

Power density

Characterization

10.1002/aenm.202003529

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Citations (47)

Evidence of manganese incorporation and distribution at the nanoscale in coccolithophore calcite

Research Square (Research Square) (2022)

Cinzia Bottini Monica Dapiaggi Nicola Rotiroti G. Gambacorta Chiara Bettoni

Abstract The coccolithophore algae (Calcihaptophycidae) produce an extracellular covering of calcium carbonate plates (coccoliths) and are responsible for up to 10% of global carbon fixation through photosynthesis and biomineralization. Therefore, any alteration in cell functioning and calcification may strongly affect the ocean-atmosphere system. In this regard, the identification of any variation of the element pathways to the cell and their incorporation in the coccolith is important to understand the response of these organisms to changes in (past) environmental conditions and to identify (paleo)ecological proxies. Here, we focus on manganese which is an essential element for coccolithophore functioning: understanding whether manganese is also incorporated in coccolith calcite and if its distribution is species-specific is of seminal importance. In order to obtain ultra-high resolution (50 x 50 nm) spatial elemental distribution maps of Early to mid-Cretaceous (ca. 122 to 110 Ma) coccoliths we used synchrotron-based XRF analyses at the nano scale. The studied nannofossils belong to different taxa preferring low to higher surface-water fertility and were extracted from samples of different ages (from early Aptian to early Albian) collected in distant oceanic settings including the western Tethys, the Pacific and proto-North Atlantic Ocean. The analyses showed a high correlation in the spatial distribution of calcium and manganese in the coccoliths, suggesting that manganese is present in the coccolith calcite, and it was likely incorporated during coccolith formation. Moreover, the studied species show different Mn/Ca ratios suggesting that there is a species-specific control on the manganese uptake. Secondary calcite was also identified but it displays higher Mn/Ca ratios compared to biogenic calcite. Only the specimens collected from a black shale displayed secondary calcite crusts probably formed at the sediment-water interface after coccolith precipitation to the seafloor. Suboxic/anoxic conditions promoted manganese remobilization from Mn-oxides and Mn-oxyhydroxides which was incorporated in the secondary calcite. The Mn/Ca ratio in coccolith calcite crusts may therefore be indicator of (past) oxygen variations in bottom waters.

Coccolith

Coccolithophore

10.21203/rs.3.rs-2275687/v1

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Formation of a hardpan in the co-disposal of fly ash and sulfide mine tailings and its influence on the generation of acid mine drainage

Chemical Geology (2013)

Dino Quispe Rafael Pérez‐López Patricia Acero Carlos Ayora José Miguel Nieto

Acid Mine Drainage

10.1016/j.chemgeo.2013.07.005

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Citations (25)

Mapping the dislocation sub-structure of deformed polycrystalline Ni by scanning microbeam diffraction topography

Scripta Materialia (2011)

Brian Abbey Felix Hofmann Jonathan P.-H. Belnoue Alexander Rack R. Tucoulou

Microbeam

10.1016/j.scriptamat.2011.01.024

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Synchrotron-based characterization of arthroprosthetic CoCrMo particles in human bone marrow

Journal of Materials Science Materials in Medicine (2022)

Janosch Schoon Bernhard Hesse R. Tucoulou Sven Geißler Melanie Ort

Particles released from cobalt-chromium-molybdenum (CoCrMo) alloys are considered common elicitors of chronic inflammatory adverse effects. There is a lack of data demonstrating particle numbers, size distribution and elemental composition of bone marrow resident particles which would allow for implementation of clinically relevant test strategies in bone marrow models at different degrees of exposure. The aim of this study was to investigate metal particle exposure in human periprosthetic bone marrow of three types of arthroplasty implants. Periprosthetic bone marrow sections from eight patients exposed to CoCrMo particles were analyzed via spatially resolved and synchrotron-based nanoscopic X-ray fluorescence imaging. These analyses revealed lognormal particle size distribution patterns predominantly towards the nanoscale. Analyses of particle numbers and normalization to bone marrow volume and bone marrow cell number indicated particle concentrations of up to 1 × 1011 particles/ml bone marrow or 2 × 104 particles/bone marrow cell, respectively. Analyses of elemental ratios of CoCrMo particles showed that particularly the particles' Co content depends on particle size. The obtained data point towards Co release from arthroprosthetic particles in the course of dealloying and degradation processes of larger particles within periprosthetic bone marrow. This is the first study providing data based on metal particle analyses to be used for future in vitro and in vivo studies of possible toxic effects in human bone marrow following exposure to arthroprosthetic CoCrMo particles of different concentration, size, and elemental composition. Graphical abstract.

Particle (ecology)

10.1007/s10856-022-06675-2

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How does the B1-B2 phase transition of ferropericlase (Mg,Fe)O affect the light curve of a transiting super-Earth-type planet?

F. Sohl Szilárd Csizmadia Leonid Dubrovinsky Natalia Dubrovinskaia S. Padovan

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Thlaspi arvense binds Cu(ii) as a bis-(l-histidinato) complex on root cell walls in an urban ecosystem

Metallomics (2013)

Alain Manceau Alexandre Simionovici Martine Lanson Jonathan Perrin R. Tucoulou

Root cell walls accumulate metal cations both during acquisition from the environment and removal from the protoplast to avoid toxicity, but molecular forms of the metals under field conditions remain elusive. We have identified how copper is bound to cell walls of intact roots of native Thlaspi arvense by combining synchrotron X-ray fluorescence and absorption techniques (XANES and EXAFS) at the nano-, micro-, and bulk scales. The plants grew naturally in sediment in a stormwater runoff basin at copper concentrations typical of urban ecosystems. About 90% of acquired copper is bound in vivo to cell walls as a unique five-coordinate Cu(ii)–bis(l-histidinato) complex with one l-histidine behaving as a tridentate ligand (histamine-like chelate) and the other as a bidentate ligand (glycine-like chelate). Tridentate binding of Cu(ii) would provide thermodynamic stability to protect cells against copper toxicity, and bidentate binding may enable kinetic lability along the cell wall through protein–protein docking with the non-bonded imidazole group of histidine residues. EXAFS spectra are provided as ESI† to facilitate further identification of Cu–histidine and distinction of Cu–N from Cu–O bonds in biomolecules.

Imidazole

10.1039/c3mt00215b

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Citations (16)

One and two dimensional space scannings of x-ray beams by diffraction on surface acoustic waves: Application to x-ray imaging

Review of Scientific Instruments (1998)

R. Tucoulou M. Brunel Д. В. Рощупкин I.A. Schelokov

X-ray diffraction on surface acoustic waves with tunable wavelength provides a way to perform beam scannings. 1D and 2D space scannings of x-ray beams by this method are presented. The feasibility of a purely optical method to perform scanning x-ray imaging without any mechanical movement is discussed.

10.1063/1.1149002

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Citations (3)