Toward Sub-Diffraction Imaging of Single-DNA Molecule Sensors Based on Stochastic Switching Localization Microscopy

Area of Science:

• Nanotechnology
• Biophysics
• Microscopy

Background:

• Deoxyribonucleic acid (DNA) possesses unique properties for nanotechnology.
• High-resolution imaging is crucial for assessing nanoscale structures.
• Super-resolution (SR) microscopy overcomes diffraction limits for molecular visualization.

Purpose of the Study:

• To review advancements in SR imaging of DNA nano-objects.
• To discuss single-molecule localization microscopy (SMLM) techniques for DNA nanostructures.
• To explore applications and future directions in optical assessment of DNA nanostructures.

Main Methods:

• Utilizing specific binding of fluorophores to target molecules.
• Applying advanced single-molecule localization microscopy (SMLM) techniques.
• Discussing methods like direct stochastic optical reconstruction microscopy (dSTORM), binding-activated localization microscopy (BALM), and point accumulation for imaging nanoscale topography (PAINT).

Main Results:

• SR microscopy, particularly SMLM, enables precise optical assessment of DNA nanostructures.
• Various SMLM techniques offer distinct advantages for imaging DNA nano-objects.
• Demonstrated wide-range detection at the single-molecule level is achievable.

Conclusions:

• SR imaging with SMLM techniques is a powerful tool for analyzing DNA nanostructures.
• Understanding the advantages and limitations of different SMLM methods is key for their application.
• Future perspectives involve further development and application of these techniques in nanotechnology.