Equipment Setup for Fluorescence Imaging with One-Nanometer Accuracy (FIONA)

Area of Science:

• Biophysics
• Optical Microscopy
• Nanotechnology

Background:

• Accurate localization of single molecules is crucial for understanding biological processes at the nanoscale.
• Existing methods face limitations in achieving nanometer precision in fluorescence imaging.
• Total internal reflection (TIR) is a technique used to confine excitation light near a surface.

Purpose of the Study:

• To introduce Fluorescence Imaging with One-nanometer Accuracy (FIONA) as a method for precise fluorophore localization.
• To describe the necessary equipment setup for FIONA.
• To detail the procedure for achieving total internal reflection (TIR) in conjunction with FIONA.

Main Methods:

• Utilizing a simple setup for fluorescence imaging.
• Implementing techniques for achieving nanometer accuracy in the xy plane.
• Establishing conditions for total internal reflection (TIR).

Main Results:

• Demonstrated the capability of FIONA to localize single fluorophores with nanometer accuracy.
• Provided a procedural guide for setting up FIONA equipment.
• Successfully achieved total internal reflection (TIR) for enhanced imaging.

Conclusions:

• FIONA is a straightforward and effective method for high-accuracy single-molecule localization.
• The described procedures facilitate the implementation of FIONA for advanced optical microscopy.
• FIONA, combined with TIR, offers a powerful tool for nanoscale investigations.