What question did this study set out to answer?

The aim is to provide an overview of Förster Resonance Energy Transfer (FRET) as a method for measuring nanoscale distances between molecules.

June 13, 2026Open Access

FRET Microscopy – Probing the Nanoscale

Key Points

The aim is to provide an overview of Förster Resonance Energy Transfer (FRET) as a method for measuring nanoscale distances between molecules.
Overview of FRET principles and historical milestones.
Discussion on key methods and applications of FRET, particularly fluorescence lifetime imaging (FLIM).
Description of FRET's integration with advanced microscopy techniques and detection systems.
Highlights significant advancements in fluorescence lifetime imaging and its role in FRET.
Explains how various microscopy techniques enhance FRET measurements.
Illustrates innovative detection systems that improve FRET applications.

Abstract

The present manuscript gives a short overview on Förster Resonance Energy Transfer (FRET) for measuring molecular distances in the nanometer range. The principle of this method is shown, and a historical overview is given, emphasizing the most important milestones. Subsequently some principal methods and applications of FRET are reported (with some emphasis on fluorescence lifetime imaging, FLIM), and finally a combination with various microscope techniques and innovative detection systems is described.

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