Experimental reconstructions of 3D atomic structures from electron microscopy images using a Bayesian genetic algorithm

oleh: Annick De Backer, Sandra Van Aert, Christel Faes, Ece Arslan Irmak, Peter D. Nellist, Lewys Jones

Format: Article
Diterbitkan: Nature Portfolio 2022-10-01

Deskripsi

Abstract We introduce a Bayesian genetic algorithm for reconstructing atomic models of monotype crystalline nanoparticles from a single projection using Z-contrast imaging. The number of atoms in a projected atomic column obtained from annular dark field scanning transmission electron microscopy images serves as an input for the initial three-dimensional model. The algorithm minimizes the energy of the structure while utilizing a priori information about the finite precision of the atom-counting results and neighbor-mass relations. The results show promising prospects for obtaining reliable reconstructions of beam-sensitive nanoparticles during dynamical processes from images acquired with sufficiently low incident electron doses.