347 Works

In-situ 3DXRD/DCT and Topotomography methods for the martensite M18R phase characterization

The two mains points of this proposal are in one hand to focus on coupling in-situ 3DXRD/DCT and Topotomography methods to index the martensite M18R phase and to link the behavior of the grains to the microstructural environment of the SMA (size and shape of the grains, shape of the grain boundary, neighborhood...) and in other hands to test the new algorithms for DCT grain reconstruction to improve the grain morphology and reveal orientation and...

study the clay-cellulose composite by scanning diffraction

try to understand the possible skin-core structure of clay-cellulose composite by using nano scanning diffraction.

Utilizing Bragg Coherent X-ray Diffraction Imaging to Understand the Role of Anisotropy on the Self-Organization of Gas Bubble Superlattices

, , Ian ROBINSON, , Ana SUZANA & Steven LEAKE
This proposal aims to utilize Bragg coherent diffraction imaging (BCDI) at the ID01 beamline to understand the mechanism for self-organization of gas bubbles into superlattices in selected metals. 3D coherent x-ray diffraction patterns will be used to image Gas Bubble Superlattice (GBS) structures and gain quantitative information on the noble gas bubbles in GBS, such as a change in lattice parameter and strain induced in a variety of metals with a combination of isotropic and...

High entropy rock-salt oxides: homogeity, thermal behavior and synthesis

Mauro CODURI, Martina FRACCHIA, Francesco MESSINA & Catherine DEJOIE
Investigation of the compositional existence field of (Cu-Zn-Mg-Co-Ni) high entropy oxides (HEO) by high resolution diffraction: line profile and lower symmetry distortion Temperature stability: distortion evolution and phase segregation. In situ solid state synthesis and kinetics.

Relation between the catalytic efficiency, morphology and chemical state of Cu catalyst in high-rate CO2 conversion devices for low-carbon e

Jakub DRNEC, , Asger MOSS, Carlos Andres GIRON RODRIGUEZ & Marta MIROLO
Large-scale utilization of electrochemical CO 2 conversion to value-added chemicals and artificial fuels requires high reaction rates (i.e. high current densities). This can be achieved using Cu catalyst in GDE (Gas Diffusion Electrode) flow electrolyzers, overcoming the mass transport limitations. While Cu catalyst behaviour in traditional cells is well described, it is not clear how this knowledge translates into the advanced GDEs configuration as this arrangement was proposed only very recently. In this proposal, we...

USAXS and XPCS analysis of local compression and swelling dynamics in membrane fouling gels of porous nanoparticles (casein micelles)

Maksym LOGINOV, Genevieve GESAN-GUIZIOU, Frederic PIGNON, Hugues BODIGUEL, Emilie GUILBERT & Thomas ZINN
This work is aimed at description of dynamics of compression and swelling of casein micelle gels obtained on a filtration membrane surface during a transmembrane pressure variation. It is foreseen 1) to measure compression and swelling kinetics (local concentration distribution) with the help of high space- and time-resolved SAXS in order to demonstrate and analyze, for the first time, the time dependency of fouling layer properties (local compression-permeability); 2) to study compression and fouling dynamics...

Jadarite and inyoite at non ambient P-T conditions

Davide COMBONI, Francesco PAGLIARO & Tommaso BATTISTON
In this proposal we aim to investigate the structural evolution and the P-T stability range of two hydrated borates species, inyoite and jadarite, of which elastic parameters (i.e., thermal expansion coefficient, bulk volume compressibility, elastic anisotropy) and P-T stability fields are currently unknown. Such investigations will provide information about the phase stability of these minerals which can be potentially employed as aggregates in neutron-shielding concretes. Previous experiments at high-pressure conducted on other hydrated borates revealed...

Probing phase transitions in ferroelectric domain walls

Repeat overnight measurement of IHHC3613 plus 3D sxdm maps

Zn binding SARS-CoV-2 orf7a and orf8 non-structural proteins XAS study

Olivier PROUX, Germano NOBILI & Maria PETROSINO
A promising way to develop therapeutic strategies against SARS-CoV-2 is to modulate the interactions of proteins coded in the viral genome with proteins expressed by the host organism. Within this framework, possible targets are the SARS-CoV-2 orf7a and orf8 non-structural proteins. The most supported hypothesis proposed for orf7a function is the interference with virion budding tethering operated by cellular antigens, while the function of orf8 is still unknown. In this proposal, we aim at studying...

Local structure of glassy GeO2 at Mbar pressure conditions

Raffaella TORCHIO, Max WILKE, Angelika ROSA, &
Understanding the structural response of network-forming glasses to pressure is of great interest for condensed matter physics, geoscience and materials science. Silica (SiO2) and germania (GeO2) are prototype network-forming glasses. Recently a large debate is emerging about atomic coordination of these glasses under extreme compression as some experimental and theoretical works have reported that the coordination in glassy phases could exceed that of their crystalline counterparts in the 40-100 GPa range. Therefore, we propose here...

Impact of extreme conditions on the atomic structure of nanocrystalline titanium monoxide

Titanium monoxide (TiOy) is very attractive material for applied and fundamental sciences, and serves as unique model (standard) object for studying point defects and related effects of non-stoichiometry and ordering due to extremely high vacancies concentration (up to 15 at.%) on both the Ti and O sublattices. Varying these concentrations allows modifying properties of TiOy, and one of the ways to do this is to apply extreme conditions like high pressure (HP) and/or high temperature...

PDF measurements of oxide polycrystals

Stefano CHECCHIA & Frida Sveen HEMPEL
PDF measurement of inorganic oxide polycrystals

Crystal structure stability, and exsolution process of colusite thermoelectric materials from high temperature in situ synchrotron X-ray pow

Colusites Cu26V2Sn6S32 (VSn) and Cu26Cr2Ge6S32 (CrGe), were recently reported by us as ones of the more promising p-type thermoelectric materials at moderate temperature, with some of the highest figure of merit ZT, 0.93 at 675 K, and 0.86 at 700 K, respectively. We have shown recently from several techniques, that variations of the HT synthesis conditions are able to tune the degree of disorder in VSn colusite, creating by exolution process “composite” materials (ordered and...

RIXS test

Nicholas BROOKES, Flora YAKHOU-HARRIS, Davide BETTO, Roberto SANT, Leonardo MARTINELLI & Kurt Kummer
Test of cuprates with a small magnetic field using permanent magnets.

Nanoscintillator-photosensitizer conjugate for X-ray induced photodynamic therapy : in vitro studies

Anamarija ABU EL RUB, , Anthony NOMEZINE, Clémentine FULBERT, Helene ELLEAUME, Sarah STELSE-MASSON & Thibault JACQUET
The aim of this proposal is to study the ability of radioluminescent nanoparticles (nanoscintillators) to potentiate synchrotron radiotherapy by inducing deep-tissue photodynamic therapy (PDT) and radiation dose-enhancement effect (RDE). While the RDE effect results from an excess of energy deposited by photo- and Auger electrons that are created when X-rays interact with heavy-elements, PDT relies on photosensitizers (PS) that generate cytotoxic species upon light activation. As light penetrates weakly in tissues, PDT is usually limited...

Local distortions and long range magnetic order in VI3 and CrI3

Alessandro DE VITA, Davide BETTO, Flora YAKHOU-HARRIS, Georg POELCHEN, Kurt Kummer, Nicholas BROOKES & Roberto SANT
In 2D van der Waals trihalides ferromagnets MX3 - where M is a transition metal and X a halogen - the local electronic configuration around the metal centres determines both the long range magnetic order and the electronic properties. In CrI3, the typical coordination of Cr atoms is octahedral and most of its known magnetic and electronic properties arise from it. For VI3 instead, it was recently suggested that the electronic character of V d-states...

Temperature dependent XAS of FePS3 compound

Davide BETTO, Flora YAKHOU-HARRIS, Georg POELCHEN, Kurt Kummer, Nicholas BROOKES & Roberto SANT
In 2D antiferromagnetic MPS3 compounds – M is a 3d transition metal – the correlation between spin and orbital excitations often leads to strong coupling between the electronic transitions and the lattice magnetic order. Unlike other members of the family, no evidences have been reported up to now for FePS3, despite the higher magnetic moment of iron. Our preliminary Resonant Inelastic X-ray Scattering (RIXS) measurements at the Fe L3 edge show indications of a possible...

Exploring structural, magnetic and orbital orderings in ZnV2O4

Andrew WILDES & Jennifer GRAHAM
We have been investigating the effect of sample dependence on the magnetic ground state of the geometrically frustrated spinel ZnV2O4. We have prepared two powder samples via two different routes; a conventional sintering route and a novel rapid microwave-assisted route. Our previous characterisation on HRPD and POLARIS show that our sintered sample undergoes a structural transition at ~40 K, however, our microwave sample remains cubic down to 2 K. Due to the inherent broadening of...

High pressure behaviour of BCZTx at ambient temperature

Davide COMBONI, Michael HANFLAND & Tomasz POREBA
Pb-free piezoelectric minerals based on Ba1-x(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 compounds (hereafter referred to as BCZTx) have shown promising electromechanical response. However, their full electromechanical response potential and working-temperature range has not yet been understood, primarily due to the ambiguity of the phase stability under external perturbation. Into details, the effects of hydrostatic pressure or oriented stress on the temperature-dependent polymorphic phase transitions (TPPT) are still unknown. This information is critical in order to understand and improve the working...

Single Crystal X-Ray Diffraction Investigation of the Heterogenous High Tc La-H Mixtures

Recent experiments have demonstrated an astonishing close-to room temperature superconductivity (~ 250 K) in laser-heated La-H mixtures between 135 GPa and 200 GPa. While the predicted LaH10 phase with a high superconducting temperature (Tc) was reported to have been observed, both resistivity and powder X-ray diffraction measurements reveal highly inhomogeneous samples with numerous unknown phases. To properly understand the high Tc detected in La-H samples, it is vital to structurally identify all phases present. The...

X-ray transmission/absorption tests

Mohamed Fares SLIM
Experimental tests will be carried out to test the x-ray transmission across thick additive manufactured metallic components in order to determine the experimental parameters and estimate beam time for future experiments.

NMC battery Materials XRD-CT test

Jonathan Wright & Simon JACQUES
XRD-CT test scans for NMC battery materials

Investigation of organic oscillators by means of a multivariate coupled XAS/UV-Vis analysis

Chemical oscillators are systems in which the concentration of one or more chemical species undergoes a periodic time evolution. The periodic behaviour of the system is driven by an irreversible chemical reaction and is made possible by a series of competing chemical processes that may depend on an element that can exist in different oxidation states. Belousov-Zhabotinsky (BZ) type oscillators exploit bromine chemistry and a metal redox switch such as the Fe(II)/Fe(III) couple to achieve...

Investigation by 3D nano-holotomography of the self-healability of an Aluminium alloy produced by additive manufacturing

Julie GHEYSEN, , Florent HANNARD, Eric MAIRE, Grzegorz PYKA, Aude SIMAR & Julie VILLANOVA
Al parts might be subjected to overloads leading to voids, cracks and the replacement of the part. A promising solution is to use self-healing material. A self-healing Al alloy was produced by SLM based on Al-Si and Mg powder. The microstructure is composed of a Si network and Mg2Si precipitates in a α-Al matrix. During an overload, void nucleation occurs due to fracture of the Si network and of precipitates. The idea is to use...

Au L-edge XAS of gold complexes: one-electron processes @ gold

Gold chemistry has tremendously progressed recently but so far, it is essentially all based on Au(I) and Au(III) complexes. Au(IV) complexes are unprecedented and single-electron processes are extremely rare. Herein, we propose to explore Au(III) complexes featuring redox-active ligands with the aim to open a new facet in gold chemistry. The unprecedented and open-shell nature of such species make X-ray absorption spectroscopy most relevant and valuable to assess their electronic and coordination environment. Gold L-edge...

Registration Year

  • 2021

Resource Types

  • Dataset