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Related Experiment Video

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Label-Free Single Nanoparticle Identification and Characterization in Demanding Environment, Including Infectious

Minh-Chau Nguyen1, Peter Bonnaud1, Rayane Dibsy2

  • 1UMR 7252, CNRS, XLIM, Université de Limoges, Limoges, F-87000, France.

Small (Weinheim an Der Bergstrasse, Germany)
|November 27, 2023
PubMed
Summary

RYtov MIcroscopy for Nanoparticles Identification (RYMINI) offers label-free, non-invasive nanoparticle analysis. This method accurately identifies and characterizes various nanoparticles, including viruses, in solution for diverse applications.

Keywords:
infectious virus imaginglabel‐free single nanoparticle identificationquantitative phase microscopysingle nanoobject metrology

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Area of Science:

  • Optical physics
  • Nanotechnology
  • Biomedical engineering

Background:

  • Accurate identification and characterization of unknown nanoparticles are crucial for medicine, industry, and environmental monitoring.
  • Existing methods often require staining or are destructive, limiting their applicability in sensitive environments.

Purpose of the Study:

  • To introduce a novel, staining-free, non-invasive, and non-destructive optical method for single nanoparticle identification and characterization.
  • To demonstrate the capability of the system in demanding environments, such as BSL-3 laboratories.

Main Methods:

  • Development and implementation of RYtov MIcroscopy for Nanoparticles Identification (RYMINI).
  • Integration of holographic label-free 3D tracking with high-sensitivity quantitative phase imaging.
  • Metrological characterization of individual nanoparticles in solution, including viruses and extracellular vesicles.

Main Results:

  • RYMINI accurately determines the nature, concentration, size, complex refractive index, and mass of single nanoparticles without prior knowledge.
  • Achieved >90% accuracy in distinguishing between dielectric, metallic, and biological nanoparticles.
  • Demonstrated ≈80% accuracy for intraclass chemical determination of metallic and dielectric nanoparticles, with 50-70% for biological nanoparticle typing.

Conclusions:

  • RYMINI is a robust and versatile tool for nanoparticle analysis in challenging settings.
  • The technology enables comprehensive, label-free characterization of nano-objects, advancing fields like virology and materials science.
  • RYMINI provides a significant advancement in metrological characterization of nanoparticles at the single-particle level.