Many Congratulations to Liqi (PhD student) and coauthors! We would like to thank tremendous contributions from our collaborators to this work. A great collaborative result! Nature Communications 11, 2773 (2020).

In this paper, we, for the very first time demonstrate that electron ptychography can recover the phase of the specimen with continuous information transfer across a wide range of the spatial frequency spectrum, with improved transfer at lower spatial frequencies and as such is more efficient for phase recovery than conventional phase contrast imaging. We further show that the method can be used to study frozen-hydrated specimens of rotavirus double-layered particles and HIV-1 virus like particles under low-dose conditions (5.7 e/Ų) and heterogeneous objects in an Adenovirus-infected cell over large fields of view (1.14 × 1.14 μm) thus making it suitable for studies of many biologically important structures. Low-Dose Phase Retrieval of Biological Specimens using Cryo-Electron Ptychography