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Three-dimensional electron ptychography of organic-inorganic hybrid nanostructures.

ABSTRACT: Three dimensional scaffolded DNA origami with inorganic nanoparticles has been used to create tailored multidimensional nanostructures. However, the image contrast of DNA is poorer than those of the heavy nanoparticles in conventional transmission electron microscopy at high defocus so that the biological and non-biological components in 3D scaffolds cannot be simultaneously resolved using tomography of samples in a native state. We demonstrate the use of electron ptychography to recover high contrast phase information from all components in a DNA origami scaffold without staining. We further quantitatively evaluate the enhancement of contrast in comparison with conventional transmission electron microscopy. In addition, We show that for ptychography post-reconstruction focusing simplifies the workflow and reduces electron dose and beam damage.

SUBMITTER: Ding Z

PROVIDER: S-EPMC9378626 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature

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Three-dimensional electron ptychography of organic-inorganic hybrid nanostructures.

Ding Zhiyuan Z Gao Si S Fang Weina W Huang Chen C Zhou Liqi L Pei Xudong X Liu Xiaoguo X Pan Xiaoqing X Fan Chunhai C Kirkland Angus I AI Wang Peng P

Nature communications 20220815 1

Three dimensional scaffolded DNA origami with inorganic nanoparticles has been used to create tailored multidimensional nanostructures. However, the image contrast of DNA is poorer than those of the heavy nanoparticles in conventional transmission electron microscopy at high defocus so that the biological and non-biological components in 3D scaffolds cannot be simultaneously resolved using tomography of samples in a native state. We demonstrate the use of electron ptychography to recover high co ...[more]

PMID: 35970924

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