Atomic Resolution Defocused Electron Ptychography at Low Dose with a Fast, Direct Electron Detector.

ABSTRACT: Electron ptychography has recently attracted considerable interest for high resolution phase-sensitive imaging. However, to date studies have been mainly limited to radiation resistant samples as the electron dose required to record a ptychographic dataset is too high for use with beam-sensitive materials. Here we report defocused electron ptychography using a fast, direct-counting detector to reconstruct the transmission function, which is in turn related to the electrostatic potential of a two-dimensional material at atomic resolution under various low dose conditions.

SUBMITTER: Song J 

PROVIDER: S-EPMC6408533 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature