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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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 developed.

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Related Experiment Video

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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
12:51

Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy

Published on: December 9, 2013

Superlocalization spectral imaging microscopy of a multicolor quantum dot complex.

Xingbo Shi1, Zhongqiu Xie, Yuehong Song

  • 1School of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, China 410082.

Analytical Chemistry
|February 7, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces spectral imaging nanoscopy to precisely measure distances between quantum dots (QDs) by tracking their blinking fluorescence. This technique enables super-resolution microscopy at the single-molecule level.

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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
12:51

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Published on: December 9, 2013

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Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

Area of Science:

  • Optical microscopy
  • Nanotechnology
  • Molecular imaging

Background:

  • Super-resolution microscopy requires precise localization of single molecules.
  • Quantum dot (QD) fluorescence intermittency (blinking) allows for molecule identification.
  • Distinguishing individual QDs in close proximity is crucial for nanoscale measurements.

Purpose of the Study:

  • To develop a spectral imaging based color nanoscopy technique.
  • To measure distances between adjacent quantum dots (QDs) with high precision.
  • To demonstrate the capability of distinguishing dual-color QDs within a diffraction-limited spot.

Main Methods:

  • Utilized spectral imaging to track the first-order spectrum of blinking quantum dots (QDs).
  • Developed a method to identify which QD is blinking in a multicolor complex.
  • Constructed oligonucleotide strands of varying lengths (15, 30, 45 bp) as calibration rulers.

Main Results:

  • Successfully measured distances between QDs in the tens of nanometers range.
  • Achieved an average measurement precision of 6 nm.
  • Demonstrated the ability to distinguish intracellular dual-color QDs within a single diffraction-limited spot.

Conclusions:

  • Spectral imaging nanoscopy provides a reliable method for nanoscale distance measurements.
  • The developed technique enhances super-resolution microscopy capabilities at the single-molecule level.
  • This approach is effective for differentiating and localizing multiple QDs in complex biological environments.