Continuous scanning for Bragg coherent X-ray imaging

Li, Ni; Dupraz, Maxime; Wu, Longfei; Leake, Steven; Resta, Andrea; Carnis, Jérôme; Labat, S.; Almog, Ehud; Rabkin, Eugen; Favre‐Nicolin, V.; Picca, F.; Berenguer, Felisa; Poll, R.; Hofmann, Jan P.; Vlad, Alina; Thomas, O.; Garreau, Y.; Coati, Alessandro; Richard, M.-I.

doi:10.1038/s41598-020-69678-5

Cited by 8 publications

(9 citation statements)

References 36 publications

(34 reference statements)

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“…This problem can be faced by increasing the interaction between the particle and the substrate or by computational methods . Besides, continuous scanning (rocking curve) was proposed to decrease the time acquisitions and mitigate the drawbacks related to the beam–-sample interaction, especially during in situ experiments . Apart from the requirements for the NP, the stability and precision of the rotation stages must be maximized, to get the best possible resolution of the final images.…”

Section: Fundamental Aspects Of Bcdimentioning

confidence: 99%

“…BCDI has been applied in several fields of science and technology including the study of NPs in general, ,,,,,− zeolites, , heterogeneous catalysis, ,,− batteries, − supercapacitors dielectrics, − nanowires, ,− minerals, − alloys and dealloying, − nanorods, ,− proteins, − thin films, ,…”

Section: Bcdi Applied To Electrochemistry and Heterogeneous Catalysismentioning

confidence: 99%

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Bragg Coherent Diffraction Imaging for In Situ Studies in Electrocatalysis

et al. 2021

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Electrocatalysis is at the heart of a broad range of physicochemical applications that play an important role in the present and future of a sustainable economy. Among the myriad of different electrocatalysts used in this field, nanomaterials are of ubiquitous importance. An increased surface area/volume ratio compared to bulk makes nanoscale catalysts the preferred choice to perform electrocatalytic reactions. Bragg coherent diffraction imaging (BCDI) was introduced in 2006 and since has been applied to obtain 3D images of crystalline nanomaterials. BCDI provides information about the displacement field, which is directly related to strain. Lattice strain in the catalysts impacts their electronic configuration and, consequently, their binding energy with reaction intermediates. Even though there have been significant improvements since its birth, the fact that the experiments can only be performed at synchrotron facilities and its relatively low resolution to date (∼10 nm spatial resolution) have prevented the popularization of this technique. Herein, we will briefly describe the fundamentals of the technique, including the electrocatalysis relevant information that we can extract from it. Subsequently, we review some of the computational experiments that complement the BCDI data for enhanced information extraction and improved understanding of the underlying nanoscale electrocatalytic processes. We next highlight success stories of BCDI applied to different electrochemical systems and in heterogeneous catalysis to show how the technique can contribute to future studies in electrocatalysis. Finally, we outline current challenges in spatiotemporal resolution limits of BCDI and provide our perspectives on recent developments in synchrotron facilities as well as the role of machine learning and artificial intelligence in addressing them.

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Section: Fundamental Aspects Of Bcdimentioning

confidence: 99%

Section: Bcdi Applied To Electrochemistry and Heterogeneous Catalysismentioning

confidence: 99%

Bragg Coherent Diffraction Imaging for In Situ Studies in Electrocatalysis

et al. 2021

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“…Thus, if the beam size is smaller than the grain size, then ff-HEDM information (elastic strain tensor and crystallographic orientation) can be reconstructed intragranularly. In this way, pf-HEDM provides high-resolution spatially resolved measurements of orientation and elastic strain information similar to Bragg coherent diffraction imaging (BCDI) [73][74][75][76], dark-field X-ray microscopy (DFXM) [77][78][79][80], or differential-aperture X-ray microscopy (DAXM) [81][82][83]. The main differences between these other high-resolution techniques and pf-HEDM are that pf-HEDM measurements can be made across mm-sized networks of differently oriented grains with ease (i.e., without requiring any grain alignment or custom sample tilting), and pf-HEDM is not limited by sample tilting/rocking capabilities to capture potentially large intragranular orientation/strain gradients.…”

Section: Introductionmentioning

confidence: 99%

Resolving intragranular stress fields in plastically deformed titanium using point-focused high-energy diffraction microscopy

Sharma

Kenesei

et al. 2023

Journal of Materials Research

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The response of a polycrystalline material to a mechanical load depends not only on the response of each individual grain, but also on the interaction with its neighbors. These interactions lead to local, intragranular stress concentrations that often dictate the initiation of plastic deformation and consequently the macroscopic stress–strain behavior. However, very few experimental studies have quantified intragranular stresses across bulk, three-dimensional volumes. In this work, a synchrotron X-ray diffraction technique called point-focused high-energy diffraction microscopy (pf-HEDM) is used to characterize intragranular deformation across a bulk, plastically deformed, polycrystalline titanium specimen. The results reveal the heterogenous stress distributions within individual grains and across grain boundaries, a stress concentration between a low and high Schmid factor grain pair, and a stress gradient near an extension twinning boundary. This work demonstrates the potential for the future use of pf-HEDM for understanding the local deformation associated with networks of grains and informing mesoscale models. Graphical abstract

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“…Synchrotron XRD and grazing-incidence XRD (GIXRD) measurements were carried out on the SixS beamline of the SOLEIL synchrotron, using either 15.6 or 18.4 keV photon energies. Data were acquired in continuous mode with a 2D detector (XPAD) for efficient scanning of a wide volume of reciprocal space (Li et al, 2020). Except for specular reflections, reciprocal-space maps of all other reflections were collected at 0.3 grazing incidence (GIXRD).…”

Section: Methodsmentioning

confidence: 99%

Spatial correlation of embedded nanowires probed by X-ray off-Bragg scattering of the host matrix

et al. 2021

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It is shown that information on the spatial correlation of nano-objects embedded in a crystalline matrix can be retrieved by analysing the X-ray scattering around the Bragg reflections of the host matrix. Data are reported for vertically aligned Ni and CoNi alloy nanowires (NWs) in an SrTiO3 matrix. When the Bragg condition is fulfilled for the matrix and not for the NWs, the latter can be approximated by voids, and the scattering around the matrix reflections contains information on the self-correlation of the NWs (i.e. on their diameter d) and on the correlation between NWs (interdistance D). Nondestructive synchrotron X-ray diffraction data provide information on these values averaged over large areas, complementing local transmission electron microscopy observations. The measurements show that off-Bragg scattering around the matrix reflections can be exploited to study the spatial correlation and morphology of embedded nano-objects, independently of their crystallinity or strain or the presence of defects.

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Continuous scanning for Bragg coherent X-ray imaging

Cited by 8 publications

References 36 publications

Bragg Coherent Diffraction Imaging for In Situ Studies in Electrocatalysis

Bragg Coherent Diffraction Imaging for In Situ Studies in Electrocatalysis

Resolving intragranular stress fields in plastically deformed titanium using point-focused high-energy diffraction microscopy

Spatial correlation of embedded nanowires probed by X-ray off-Bragg scattering of the host matrix

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