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Title: Single-shot 3D coherent diffractive imaging of core-shell nanoparticles with elemental specificity
Authors: Pryor, A
Rana, A
Xu, R
Rodriguez, J.A
Yang, Y
Gallagher-Jones, M
Jiang, H
Kanhaiya, K
Nathanson, M
Park, J
Kim, S
Kim, S
Nam, D
Yue, Y
Fan, J
Sun, Z
Zhang, B
Gardner, D.F
Dias, C.S.B
Joti, Y
Hatsui, T
Kameshima, T
Inubushi, Y
Tono, K
Lee, J.Y 
Yabashi, M
Song, C
Ishikawa, T
Kapteyn, H.C
Murnane, M.M
Heinz, H
Miao, J
Issue Date: 2018
Publisher: Nature Publishing Group
Citation: Pryor, A, Rana, A, Xu, R, Rodriguez, J.A, Yang, Y, Gallagher-Jones, M, Jiang, H, Kanhaiya, K, Nathanson, M, Park, J, Kim, S, Kim, S, Nam, D, Yue, Y, Fan, J, Sun, Z, Zhang, B, Gardner, D.F, Dias, C.S.B, Joti, Y, Hatsui, T, Kameshima, T, Inubushi, Y, Tono, K, Lee, J.Y, Yabashi, M, Song, C, Ishikawa, T, Kapteyn, H.C, Murnane, M.M, Heinz, H, Miao, J (2018). Single-shot 3D coherent diffractive imaging of core-shell nanoparticles with elemental specificity. Scientific Reports 8 (1) : 8284. ScholarBank@NUS Repository.
Abstract: 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. © 2018 The Author(s).
Source Title: Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/s41598-018-26182-1
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