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在ROCK光束线进行的高光谱全场快速扩展X射线吸收精细结构成像，用于监测工艺条件下功能材料的微米级异质性。

Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions.

作者信息

Briois Valérie, Itié Jean Paul, Polian Alain, King Andrew, Traore Aliou Sadia, Marceau Eric, Ersen Ovidiu, La Fontaine Camille, Barthe Laurent, Beauvois Anthony, Roudenko Olga, Belin Stéphanie

机构信息

Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France.

IPCMS, Strasbourg, France.

出版信息

J Synchrotron Radiat. 2024 Sep 1;31(Pt 5):1084-1104. doi: 10.1107/S1600577524006581. Epub 2024 Aug 23.

DOI:10.1107/S1600577524006581
PMID:39178140
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11371034/
Abstract

Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK-SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline. Benefiting from a beam size versatility due to the beamline focusing optics, full-field hyperspectral XANES imaging has been successfully used at the Fe K-edge for monitoring the pressure-induced spin transition of a 150 µm × 150 µm Fe(o-phen)(NCS) single crystal and the charge of millimetre-sized LiFePO battery electrodes. Hyperspectral imaging over 2000 eV has been reported for the simultaneous monitoring of Fe and Cu speciation changes during activation of a FeCu bimetallic catalyst along a millimetre-sized catalyst bed. Strategies of data acquisition and post-data analysis using Jupyter notebooks and multivariate data analysis are presented, and the gain obtained using full-field hyperspectral quick-EXAFS imaging for studies of functional materials under process conditions in comparison with macroscopic information obtained by non-spatially resolved quick-EXAFS techniques is discussed.

摘要

全场透射X射线显微镜最近已在硬X射线ROCK-SOLEIL快速扩展X射线吸收精细结构（quick-EXAFS）光束线中实现，为该光束线的纳秒时间分辨率增添了微米级空间分辨率。得益于光束线聚焦光学元件的光束尺寸通用性，全场高光谱X射线吸收近边结构（XANES）成像已成功用于在铁K边监测150×150微米的Fe（邻菲罗啉）（NCS）单晶的压力诱导自旋转变以及毫米级磷酸铁锂（LiFePO）电池电极的电荷情况。据报道，在沿毫米级催化剂床激活铁铜双金属催化剂期间，通过2000电子伏特的高光谱成像可同时监测铁和铜的物种变化。本文介绍了使用Jupyter笔记本进行数据采集和数据后分析的策略以及多元数据分析方法，并讨论了与通过非空间分辨快速扩展X射线吸收精细结构技术获得的宏观信息相比，使用全场高光谱快速扩展X射线吸收精细结构成像研究工艺条件下功能材料所获得的优势。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/45785bb5093c/s-31-01084-fig17.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/45785bb5093c/s-31-01084-fig17.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/124a12680d65/s-31-01084-fig1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/f5eaf5d570cd/s-31-01084-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/b4fab839a028/s-31-01084-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/c23d7a212b9e/s-31-01084-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/196dd6e8cbfe/s-31-01084-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/f7c3009d36b1/s-31-01084-fig12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/c75ed2bc4d30/s-31-01084-fig13.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/e4f227fbb554/s-31-01084-fig14.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/a308c1efca01/s-31-01084-fig15.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b94/11371034/45785bb5093c/s-31-01084-fig17.jpg

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