Single-shot 3D coherent diffractive imaging of core-shell nanoparticles with elemental specificity

We report 3D coherent diffractive imaging (CDI) of Au/Pd core-shell nanoparticles with 6.1 nm spatial resolution with elemental specificity. We measured single-shot diffraction patterns of the nanoparticles using intense x-ray free electron laser pulses. By exploiting the curvature of the Ewald sphe...

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Veröffentlicht in:Scientific reports 2018-05, Vol.8 (1), p.8284-8, Article 8284
Hauptverfasser: Pryor, Alan, Rana, Arjun, Xu, Rui, Rodriguez, Jose A., Yang, Yongsoo, Gallagher-Jones, Marcus, Jiang, Huaidong, Kanhaiya, Krishan, Nathanson, Michael, Park, Jaehyun, Kim, Sunam, Kim, Sangsoo, Nam, Daewoong, Yue, Yu, Fan, Jiadong, Sun, Zhibin, Zhang, Bosheng, Gardner, Dennis F., Dias, Carlos Sato Baraldi, Joti, Yasumasa, Hatsui, Takaki, Kameshima, Takashi, Inubushi, Yuichi, Tono, Kensuke, Lee, Jim Yang, Yabashi, Makina, Song, Changyong, Ishikawa, Tetsuya, Kapteyn, Henry C., Murnane, Margaret M., Heinz, Hendrik, Miao, Jianwei
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Sprache:eng
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Zusammenfassung:We report 3D coherent diffractive imaging (CDI) of Au/Pd core-shell nanoparticles with 6.1 nm spatial resolution with elemental specificity. We measured single-shot diffraction patterns of the nanoparticles using intense x-ray free electron laser pulses. By exploiting the curvature of the Ewald sphere and the symmetry of the nanoparticle, we reconstructed the 3D electron density of 34 core-shell structures from these diffraction patterns. To extract 3D structural information beyond the diffraction signal, we implemented a super-resolution technique by taking advantage of CDI’s quantitative reconstruction capabilities. We used high-resolution model fitting to determine the Au core size and the Pd shell thickness to be 65.0 ± 1.0 nm and 4.0 ± 0.5 nm, respectively. We also identified the 3D elemental distribution inside the nanoparticles with an accuracy of 3%. To further examine the model fitting procedure, we simulated noisy diffraction patterns from a Au/Pd core-shell model and a solid Au model and confirmed the validity of the method. We anticipate this super-resolution CDI method can be generally used for quantitative 3D imaging of symmetrical nanostructures with elemental specificity.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-26182-1