Gated CW-STED microscopy: a versatile tool for biological nanometer scale investigation

Area of Science:

• Biophysics
• Cell Biology
• Microscopy

Background:

• Conventional light microscopy has resolution limits.
• Stimulation emission depletion (STED) microscopy overcomes these limits, enabling studies under physiological conditions.
• The complexity and cost of STED microscopy have hindered its widespread adoption.

Purpose of the Study:

• To describe a versatile gated continuous-wave STED (gCW-STED) microscope.
• To demonstrate its ability to image specimens speedily with high resolution.
• To address the limitations of complexity and cost in STED implementation.

Main Methods:

• Development and implementation of a gated continuous-wave STED (gCW-STED) microscope.
• Imaging of calibration samples to assess resolution and performance.
• Imaging of biological samples to demonstrate applicability.

Main Results:

• The gCW-STED microscope achieves spatial resolution below 50 nm.
• Imaging is performed speedily with light intensities comparable to pulsed STED systems.
• The system demonstrates versatility on both calibration and biological samples.

Conclusions:

• The developed gCW-STED microscope provides a simplified and cost-effective solution for super-resolution imaging.
• This technology facilitates the investigation of dynamic sub-cellular processes in living organisms.
• gCW-STED microscopy offers a viable alternative to more complex STED systems.