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Engineering single-atom dynamics with electron irradiation.

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.

SUBMITTER: Su C

PROVIDER: S-EPMC6524980 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Engineering single-atom dynamics with electron irradiation.

Su Cong C Tripathi Mukesh M Yan Qing-Bo QB Wang Zegao Z Zhang Zihan Z Hofer Christoph C Wang Haozhe H Basile Leonardo L Su Gang G Dong Mingdong M Meyer Jannik C JC Kotakoski Jani J Kong Jing J Idrobo Juan-Carlos JC Susi Toma T Li Ju J

Science advances 20190517 5

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 ...[more]

PMID: 31114798

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