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Updated: May 20, 2026
15:04
Picometer-Precision Atomic Position Tracking through Electron Microscopy
Published on: July 3, 2021
Setup for single-particle orbit tracking: artifacts and corrections.
Dominique Ernst1, Stefan Hain, Jürgen Köhler
1Experimental Physics IV and Bayreuth Institute of Macromolecular Research, University of Bayreuth, Bayreuth, Germany.
Summary
We developed a single-particle orbit tracking setup to follow fluorescent nanoparticles for over 10 minutes. This method achieves 4 ms temporal resolution and 10 nm accuracy, preventing misinterpretation of results.
Area of Science:
- Nanotechnology
- Optical Microscopy
- Particle Tracking
Background:
- Accurate tracking of single nanoparticles is crucial for understanding complex fluid dynamics and material properties.
- Existing methods often face limitations in temporal resolution, accuracy, or tracking duration.
Purpose of the Study:
- To present an advanced experimental setup for high-resolution, long-duration single-particle orbit tracking.
- To demonstrate the capability of the setup using a model system and highlight potential artifacts.
Main Methods:
- Utilizing a novel optical setup for tracking fluorescent nanoparticles.
- Achieving a temporal resolution of 4 milliseconds and dynamic position accuracy below 10 nanometers.
- Employing a model system of 20 nm fluorescent polymer beads in glycerol for validation.
Main Results:
- Successfully tracked fluorescent nanoparticles for over 10 minutes continuously.
- Demonstrated the system's ability to achieve high temporal and spatial resolution.
- Identified and illustrated experimental artifacts that can affect particle tracking results.
Conclusions:
- The developed single-particle orbit tracking setup offers significant improvements in tracking performance.
- Understanding and mitigating experimental artifacts is essential for accurate nanoparticle analysis.
- This technique provides a robust tool for studying nanoscale dynamics.
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