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Total Internal Reflection Fluorescence Microscopy

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Updated: Mar 21, 2026

Visualizing Actin and Microtubule Coupling Dynamics In Vitro by Total Internal Reflection Fluorescence TIRF Microscopy

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Coverslip Cleaning and Functionalization for Total Internal Reflection Fluorescence Microscopy.

Emily M Kudalkar¹, Yi Deng², Trisha N Davis¹

¹Department of Biochemistry, University of Washington, Seattle, Washington 98195;

Cold Spring Harbor Protocols

|May 4, 2016

Summary

This summary is machine-generated.

Preventing nonspecific binding is crucial for high-quality total internal reflection fluorescence (TIRF) microscopy. Surface functionalization of coverslips with silane or lipid bilayers minimizes molecular adhesion, ensuring accurate single-molecule imaging and analysis.

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Area of Science:

Biophysics
Microscopy techniques
Surface chemistry

Background:

Total internal reflection fluorescence (TIRF) microscopy visualizes single-molecule events near a coverslip.
High signal-to-noise ratio is essential for TIRF imaging quality.
Nonspecific molecular adhesion to coverslips compromises data accuracy and quantification.

Purpose of the Study:

To address challenges posed by nonspecific binding in TIRF microscopy.
To improve the reliability of single-molecule visualization and affinity measurements.
To present methods for minimizing unwanted molecular interactions on coverslip surfaces.

Main Methods:

Thorough cleaning of glass coverslip surfaces.
Surface functionalization using silane treatment.
Coating coverslips with lipid bilayers.

Main Results:

Functionalized surfaces effectively prevent nonspecific molecular adherence.
Reduced background noise enhances signal-to-noise ratio in TIRF images.
Accurate quantification of binding events and affinity constants is enabled.

Conclusions:

Surface functionalization is critical for reliable TIRF microscopy.
Silane or lipid bilayer coatings mitigate nonspecific binding.
Optimized surface preparation is key for high-fidelity single-molecule studies.