[Comparison and progress review of various super-resolution fluorescence imaging techniques]

Area of Science:

• Life Science Research
• Microscopy
• Biotechnology

Background:

• Traditional fluorescence microscopy is limited by the optical diffraction limit, hindering molecular-level visualization.
• Understanding molecular dynamics and networks is crucial in life sciences, necessitating advanced imaging techniques.
• Artificial signals in fluorescence imaging can lead to erroneous experimental results due to resolution limitations.

Purpose of the Study:

• To introduce and compare mainstream super-resolution fluorescence imaging technologies.
• To highlight the advantages and application scope of different super-resolution techniques.
• To guide researchers in selecting appropriate super-resolution methods for their studies.

Main Methods:

• Comparison of three primary super-resolution imaging technologies: structured illumination microscopy (SIM), stimulated emission depletion (STED), and single-molecule localization microscopy (SMLM).
• Analysis of the underlying principles and technical performances of each method.
• Review of current application progress in biology and other scientific fields.

Main Results:

• Super-resolution imaging breaks the diffraction limit, enabling nanometer-scale visualization of biomolecules.
• SIM offers 3D real-time imaging but requires resolution optimization; STED provides high spatial resolution with limitations in field of view and photobleaching; SMLM's temporal resolution depends on fluorophore properties.
• Advancements in imaging speed, photobleaching resistance, and multi-color capabilities are key determinants for super-resolution fluorescence imaging.

Conclusions:

• Super-resolution fluorescence imaging is a powerful tool for life sciences, expanding into material science and catalysis.
• Each super-resolution technique (SIM, STED, SMLM) has distinct advantages and limitations, influencing its application scope.
• Understanding these differences is essential for researchers to effectively apply super-resolution imaging for structural and dynamic studies.