Chemical state visualization using x-ray spectroscopic ptychography in SPring-8

Nozomu Ishiguro

doi:10.1117/12.2675714

5 October 2023 Chemical state visualization using x-ray spectroscopic ptychography in SPring-8

Nozomu Ishiguro

Proceedings Volume 12698, X-Ray Nanoimaging: Instruments and Methods VI; 1269806 (2023) https://doi.org/10.1117/12.2675714
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

X-ray ptychography is one of the coherent x-ray diffractive imaging techniques with the object of interest scanned in small steps by an overlapping probe. The collected diffraction pattern set is reconstructed into real-space images of the sample by iterative phase retrieval calculation with a 10 nm order spatial resolution. The spectroscopic ptychography method is a combination of x-ray ptychography imaging and XAFS spectroscopy, where x-ray ptychography measurements are applied in x-ray energy around the target absorption edge. Thus, the reconstructed image stacks of the sample objects provide highly spatially resolved XAFS spectra of the non-uniform materials in nanoscale, which is considered to be the most promising tools for visualizing mesoscopic structures and chemical states (e.g., element composition, valence, local structures, etc.). Here, we report on our research and developments of hard x-ray spectroscopic ptychography systems at SPring-8, Japan, and show some demonstrations of the use of this method to visualize the chemical states of practical materials, especially battery material particles on the nano- and meso-scale. We have also developed x-ray ptychography in tender x-ray regions (2.5 keV) for the first time. This technique will be a powerful tool for analyzing samples containing sulfur, phosphorus, chlorine, etc., with high spatial resolution, such as battery materials, soft materials, and biomaterials.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Nozomu Ishiguro "Chemical state visualization using x-ray spectroscopic ptychography in SPring-8", Proc. SPIE 12698, X-Ray Nanoimaging: Instruments and Methods VI, 1269806 (5 October 2023); https://doi.org/10.1117/12.2675714

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