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Related Experiment Video

Updated: Jan 24, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Engineering single-atom dynamics with electron irradiation.

Cong Su^1,2, Mukesh Tripathi³, Qing-Bo Yan⁴

¹Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Science Advances

|May 23, 2019

Summary

This summary is machine-generated.

Electron irradiation enables atomic engineering by controlling single atom dynamics in graphene. This study predicts and experimentally validates how electron collisions influence phosphorus dopant configurations for targeted atomic manipulation.

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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Picometer-Precision Atomic Position Tracking through Electron Microscopy

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Published on: July 3, 2021

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Atomic engineering aims to control individual atom behavior for creating advanced materials.
Electron irradiation is a powerful tool for manipulating atoms at the nanoscale.
Understanding the dynamics of dopants in graphene is crucial for its applications.

Purpose of the Study:

To investigate the single-step dynamics of phosphorus dopants in graphene under electron irradiation.
To develop a theoretical framework predicting the outcomes of atomic collisions.
To enable precise control over atomic configurations for future material design.

Main Methods:

Atomically resolved experimental observations of electron-irradiated graphene.
Computational simulations of primary knock-on atom (PKO) collisions.
Theoretical modeling of configurational outcome probabilities based on PKO momentum.

Main Results:

The study successfully surveyed the dynamics of single phosphorus dopants in graphene.
A theory was developed to predict the probabilities of different atomic configurations post-collision.
Predicted branching ratios for configurational transformations closely matched experimental results.

Conclusions:

Electron irradiation can be used to selectively control the dynamics of single atoms in graphene.
The developed theory provides a pathway for biasing atomic dynamics toward desired outcomes.
This research paves the way for designing and scaling atomic engineering techniques.