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- W3034352892 abstract "Abstract Both high resolution and high precision are required to quantitatively determine the atomic structure of complex nanostructured materials. However, for conventional imaging methods in scanning transmission electron microscopy (STEM), atomic resolution with picometer precision cannot usually be achieved for weakly-scattering samples or radiation-sensitive materials, such as 2D materials. Here, we demonstrate low-dose, sub-angstrom resolution imaging with picometer precision using mixed-state electron ptychography. We show that correctly accounting for the partial coherence of the electron beam is a prerequisite for high-quality structural reconstructions due to the intrinsic partial coherence of the electron beam. The mixed-state reconstruction gains importance especially when simultaneously pursuing high resolution, high precision and large field-of-view imaging. Compared with conventional atomic-resolution STEM imaging techniques, the mixed-state ptychographic approach simultaneously provides a four-times-faster acquisition, with double the information limit at the same dose, or up to a fifty-fold reduction in dose at the same resolution." @default.
- W3034352892 created "2020-06-19" @default.
- W3034352892 creator A5009086399 @default.
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- W3034352892 date "2020-06-12" @default.
- W3034352892 modified "2023-10-12" @default.
- W3034352892 title "Mixed-state electron ptychography enables sub-angstrom resolution imaging with picometer precision at low dose" @default.
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- W3034352892 doi "https://doi.org/10.1038/s41467-020-16688-6" @default.
- W3034352892 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7293311" @default.
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- W3034352892 hasPublicationYear "2020" @default.
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