Coherent nanoscale X-ray probe for crystal interrogation at ID01, ESRF – The European Synchrotron

Leake, Steven; Favre‐Nicolin, V.; Zatterin, Edoardo; Richard, Marie-Ingrid; Fernandez, Sylvie; Chahine, Gilbert; Zhou, Tao; Boesecke, Peter; Djazouli, Hamid; Schülli, Tobias U.

doi:10.1016/j.matdes.2017.01.092

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…[ 17 ] A schematic overview of the experimental set‐up is displayed in Figure 1 and described in more detail in ref. [ 18 ] The intensity distribution around the 002 or 111 Pt reflection was measured in vertical scattering geometry at an X‐ray energy of 9 keV.…”

Section: Resultsmentioning

confidence: 99%

Facet‐Dependent Strain Determination in Electrochemically Synthetized Platinum Model Catalytic Nanoparticles

Carnis

Gao

Fernandez

et al. 2021

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Studying model nanoparticles is one approach to better understand the structural evolution of a catalyst during reactions. These nanoparticles feature well‐defined faceting, offering the possibility to extract structural information as a function of facet orientation and compare it to theoretical simulations. Using Bragg Coherent X‐ray Diffraction Imaging, the uniformity of electrochemically synthesized model catalysts is studied, here high‐index faceted tetrahexahedral (THH) platinum nanoparticles at ambient conditions. 3D images of an individual nanoparticle are obtained, assessing not only its shape but also the specific components of the displacement and strain fields both at the surface of the nanocrystal and inside. The study reveals structural diversity of shapes and defects, and shows that the THH platinum nanoparticles present strain build‐up close to facets and edges. A facet recognition algorithm is further applied to the imaged nanoparticles and provides facet‐dependent structural information for all measured nanoparticles. In the context of strain engineering for model catalysts, this study provides insight into the shape‐controlled synthesis of platinum nanoparticles with high‐index facets.

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Section: Resultsmentioning

confidence: 99%

Facet‐Dependent Strain Determination in Electrochemically Synthetized Platinum Model Catalytic Nanoparticles

Carnis

Gao

Fernandez

et al. 2021

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“…two-dimensional MAXIPIX (ESRF, Grenoble, France) detector with a pixel size of 55 × 55 µm 2 , which was mounted 1260 mm downstream from the sample position. Further details of the experimental setup and the X-ray beam focusing at the ID01 beamline can be found in [26,27]. Prior to in situ three-point bending tests, the SFINX-tip and the nanofocused X-ray beam were aligned with respect to a pre-selected Au nanowire by optical microscopy, rendering a precision of a few micrometers followed by AFM imaging and scanning X-ray diffraction mapping using the K-mapping approach available at the ID01 beamline where the sample is continuously scanned through the beam and the diffraction yield at a selected Bragg peak is monitored [10].…”

Section: Resultsmentioning

confidence: 99%

“…The diffracted signal was recorded by a two-dimensional MAXIPIX (ESRF, Grenoble, France) detector with a pixel size of 55 × 55 µm 2 , which was mounted 1260 mm downstream from the sample position. Further details of the experimental setup and the X-ray beam focusing at the ID01 beamline can be found in [26,27].…”

Section: Methodsmentioning

confidence: 99%

In Situ Coherent X-ray Diffraction during Three-Point Bending of a Au Nanowire: Visualization and Quantification

Davydok

Cornelius

Ren

et al. 2018

QuBS

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The three-point bending behavior of a single Au nanowire deformed by an atomic force microscope was monitored by coherent X-ray diffraction using a sub-micrometer sized hard X-ray beam. Three-dimensional reciprocal-space maps were recorded before and after deformation by standard rocking curves and were measured by scanning the energy of the incident X-ray beam during deformation at different loading stages. The mechanical behavior of the nanowire was visualized in reciprocal space and a complex deformation mechanism is described. In addition to the expected bending of the nanowire, torsion was detected. Bending and torsion angles were quantified from the high-resolution diffraction data.

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“…The film was electron-beam evaporated on a lithographically patterned substrate consisting of $2 mm-sized holes in a marked 50 mm pitch grid. The focal profile of the beam was characterized using a 2D ptychography (Pfeiffer, 2018) approach on a test pattern featuring a 30 mm-diameter tungsten Siemens star placed close to the focal position of the KB mirrors (Leake et al, 2017). The patterned thin film eventually results in a regular array of crystals with a single and isolated particle in the centre of each square as illustrated by the scanning electron micrographs presented in Figs BCDI of Au particles was performed at the ID01 beamline at the European Synchrotron Radiation Facility (ESRF), Grenoble, France (Leake et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Multi-wavelength Bragg coherent X-ray diffraction imaging of Au particles

Lauraux¹,

Cornelius²,

Labat³

et al. 2020

J Appl Crystallogr

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Multi-wavelength (mw) Bragg coherent X-ray diffraction imaging (BCDI) is demonstrated on a single Au particle. The multi-wavelength Bragg diffraction patterns are inverted using conventional phase-retrieval algorithms where the dilation of the effective pixel size of a pixelated 2D detector caused by the variation of the X-ray beam energy is mitigated by interpolating the raw data. The reconstructed Bragg electron density and phase field are in excellent agreement with the results obtained from conventional rocking scans of the same particle. Voxel sizes of about 6 3 nm 3 are obtained for reconstructions from both approaches. Phase shifts as small as 0.41 rad, which correspond to displacements of 14 pm and translate into strain resolution better than 10 À4 in the Au particle, are resolved. The displacement field changes shape during the experiment, which is well reproduced by finite element method simulations considering an inhomogeneous strained carbon layer deposited on the Au particle over the course of the measurements. These experiments thus demonstrate the very high sensitivity of BCDI and mw-BCDI to strain induced by contaminations. Furthermore, mw-BCDI offers new opportunities for in situ and operando 3D strain imaging in complex sample environments.research papers

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Coherent nanoscale X-ray probe for crystal interrogation at ID01, ESRF – The European Synchrotron

Cited by 20 publications

References 14 publications

Facet‐Dependent Strain Determination in Electrochemically Synthetized Platinum Model Catalytic Nanoparticles

Facet‐Dependent Strain Determination in Electrochemically Synthetized Platinum Model Catalytic Nanoparticles

In Situ Coherent X-ray Diffraction during Three-Point Bending of a Au Nanowire: Visualization and Quantification

Multi-wavelength Bragg coherent X-ray diffraction imaging of Au particles

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