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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Related Experiment Video

Updated: Sep 24, 2025

Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering
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Super-Resolution Vibrational Imaging Using Expansion Stimulated Raman Scattering Microscopy.

Lixue Shi1, Aleksandra Klimas2, Brendan Gallagher2

  • 1Department of Chemistry, Columbia University, New York, NY, 10027, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 6, 2022
PubMed
Summary

Molecule anchorable gel-enabled nanoscale Imaging of Fluorescence and stimulated Raman scattering microscopy (MAGNIFIERS) overcomes diffraction limits. This new technique achieves sub-50 nm resolution for label-free chemical imaging of biological specimens.

Keywords:
Raman nanoscopychemical imagingexpansion microscopyhighly multiplexed nanoscale imagingmetabolic imaging

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Area of Science:

  • Biophysics
  • Chemical Imaging
  • Nanotechnology

Background:

  • Stimulated Raman scattering (SRS) microscopy offers high chemical specificity but is limited by diffraction.
  • Existing fluorescence microscopy struggles with small biomolecules and multiplexing.
  • Overcoming the diffraction limit is crucial for advanced biological imaging.

Purpose of the Study:

  • To develop a novel imaging technique integrating SRS microscopy and expansion microscopy (ExM).
  • To achieve nanoscale resolution with chemical specificity for biological samples.
  • To enable highly multiplexed and label-free imaging capabilities.

Main Methods:

  • Integration of SRS microscopy with expansion microscopy (ExM) into a technique named MAGNIFIERS.
  • Utilizing C-H vibration for label-free visualization of proteins, lipids, and DNA.
  • Application of metabolic labeling for tracking small metabolites during protein synthesis.

Main Results:

  • MAGNIFIERS achieved sub-50 nm resolution for chemical-specific nanoscale imaging.
  • Demonstrated label-free visualization of biomolecules in diverse biological specimens including mouse tissues and human organoids.
  • Successfully tracked nanoscale protein synthesis and performed 8-color nanoscale imaging.

Conclusions:

  • MAGNIFIERS provides a powerful platform for super-resolution, label-free chemical imaging.
  • The technique enables high-resolution metabolic imaging and highly multiplexed nanoscale imaging.
  • MAGNIFIERS extends the capabilities of SRS microscopy into the realm of nanoscopy.