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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Related Experiment Video

Updated: Jun 22, 2026

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Probing dynamics at interfaces: resonance enhanced dynamic light scattering.

Markus A Plum1, Werner Steffen, George Fytas

  • 1Max Planck Institute for Polymer Research, Mainz, Germany.

Optics Express
|June 10, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a new dynamic light scattering method using surface plasmon polaritons to observe particle diffusion near interfaces. This technique enhances signal quality and broadens substrate applicability for supramolecular dynamics research.

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Last Updated: Jun 22, 2026

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Area of Science:

  • Supramolecular chemistry
  • Surface science
  • Materials science

Background:

  • Understanding supramolecular dynamics at interfaces is crucial for polymers, particles, and cells.
  • Existing experimental methods lack the required spatial and time resolution.
  • Evanescent wave dynamic light scattering has limited sensitivity and substrate compatibility.

Purpose of the Study:

  • To develop a novel dynamic light scattering (DLS) technique for probing interfacial supramolecular dynamics.
  • To overcome the limitations of existing methods, particularly sensitivity and substrate restrictions.
  • To enable the study of dynamic behavior at metallic interfaces.

Main Methods:

  • Implementation of a DLS experiment utilizing surface plasmon polaritons (SPPs) as the excitation source.
  • Employing SPPs to enhance the signal-to-noise ratio for interfacial measurements.
  • Demonstrating the technique's capability with the diffusion of nanoparticles (down to 10nm radii) near a gold surface.

Main Results:

  • Successful experimental realization of DLS close to an interface using SPPs.
  • Significant increase in signal-to-noise ratio compared to previous methods.
  • Demonstrated ability to study the diffusion of small nanoparticles at a metallic interface.

Conclusions:

  • The developed SPP-based DLS method is a powerful new tool for investigating interfacial dynamics.
  • This technique offers improved sensitivity and versatility for studying phenomena at various interfaces.
  • It opens new avenues for research in areas like thin films, membranes, and biological systems.