Engineering single-atom dynamics with electron irradiation

Author(s)
Cong Su, Mukesh Tripathi, Qing Bo Yan, Zegao Wang, Zihan Zhang, Christoph Hofer, Haozhe Wang, Leonardo Basile, Gang Su, Mingdong Dong, Jannik C. Meyer, Jani Kotakoski, Jing Kong, Juan Carlos Idrobo, Toma Susi, Ju Li
Abstract

Atomic engineering is envisioned to involve selectively inducing the desired dynamics of single atoms and combining these steps for larger-scale assemblies. Here, we focus on the first part by surveying the single-step dynamics of graphene dopants, primarily phosphorus, caused by electron irradiation both in experiment and simulation, and develop a theory for describing the probabilities of competing configurational outcomes depending on the postcollision momentum vector of the primary knock-on atom. The predicted branching ratio of configurational transformations agrees well with our atomically resolved experiments. This suggests a way for biasing the dynamics toward desired outcomes, paving the road for designing and further upscaling atomic engineering using electron irradiation.

Organisation(s)
Physics of Nanostructured Materials
Journal
Science Advances
Volume
5
No. of pages
11
ISSN
2375-2548
DOI
https://doi.org/10.1126/sciadv.aav2252
Publication date
05-2019
Publication status
Published
Peer reviewed
Yes
Austrian Fields of Science 2012
103042 Electron microscopy, 102009 Computer simulation, 210006 Nanotechnology, 210004 Nanomaterials
ASJC Scopus subject areas
General, Physics and Astronomy (miscellaneous)
Portal url
https://ucris.univie.ac.at/portal/en/publications/engineering-singleatom-dynamics-with-electron-irradiation(6463c35a-4bc4-4a20-a07d-e3c572b5299b).html