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Related Experiment Video

Updated: Dec 12, 2025

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Tracking Interfacial Dynamics of a Single Nanoparticle Using Plasmonic Scattering Interferometry.

Hai-Bo Chen1, Di Jiang1, Xiao-Li Zhou1

  • 1CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei 230026, China.

Analytical Chemistry
|August 16, 2020
PubMed
Summary

We developed a plasmonic imaging technique to track single nanoparticles at solution-solid interfaces. This method reveals nanoparticle behavior and membrane formation, advancing interfacial science.

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Area of Science:

  • Nanotechnology
  • Surface Science
  • Biophysics

Background:

  • Tracking single nanoparticles at interfaces is vital for understanding complex processes.
  • Existing methods face challenges in resolution and labeling requirements.

Purpose of the Study:

  • To develop a high-resolution imaging technique for unlabeled nanoparticles at solution-solid interfaces.
  • To investigate nanoparticle dynamics and interactions at the nanoscale.

Main Methods:

  • Utilized a plasmonic imaging technique based on particle-induced interferometric scattering of surface plasmonic waves.
  • Achieved high vertical sensitivity for precise tracking of nanoparticle trajectories.

Main Results:

  • Successfully tracked individual nanoparticle trajectories and their interactions with surfaces.
  • Quantified hydrodynamically hindered diffusion of nanoparticles.
  • Demonstrated surface chemistry-dependent nanoparticle behavior.
  • Visualized membrane formation from lipid vesicles.

Conclusions:

  • The developed plasmonic imaging technique offers high spatial and temporal resolution for interfacial nanoparticle analysis.
  • This method enables the study of diverse nano-objects in complex environments.
  • It provides new insights into physical, chemical, and biological interfacial processes.