Reconstructing the exit wave of 2D materials in high-resolution transmission electron microscopy using machine learning

Matthew Helmi Leth Larsen, Frederik Dahl, Lars P Hansen, Bastian Barton, Christian Kisielowski, Stig Helveg, Ole Winther, Thomas W. Hansen, Jakob Schiøtz*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

73 Downloads (Pure)

Abstract

Reconstruction of the exit wave function is an important route to interpreting high-resolution transmission electron microscopy (HRTEM) images. Here we demonstrate that convolutional neural networks can be used to reconstruct the exit wave from a short focal series of HRTEM images, with a fidelity comparable to conventional exit wave reconstruction. We use a fully convolutional neural network based on the U-Net architecture, and demonstrate that we can train it on simulated exit waves and simulated HRTEM images of graphene-supported molybdenum disulphide (an industrial desulfurization catalyst). We then apply the trained network to analyse experimentally obtained images from similar samples, and obtain exit waves that clearly show the atomically resolved structure of both the MoS2 nanoparticles and the graphene support. We also show that it is possible to successfully train the neural networks to reconstruct exit waves for 3400 different two-dimensional materials taken from the Computational 2D Materials Database of known and proposed two-dimensional materials.
Original languageEnglish
Article number113641
JournalUltramicroscopy
Volume243
Number of pages10
ISSN0304-3991
DOIs
Publication statusPublished - 2023

Keywords

  • 2D materials
  • Exit wave reconstruction
  • HRTEM
  • Machine learning

Fingerprint

Dive into the research topics of 'Reconstructing the exit wave of 2D materials in high-resolution transmission electron microscopy using machine learning'. Together they form a unique fingerprint.

Cite this