Fluorescence resonance energy transfer (FRET) is a powerful technique that measures the energy transfer between two fluorescent molecules when they are in close proximity, typically within 1 to 10 nanometers. It plays a crucial role in studying molecular interactions and dynamics, particularly within biological systems, by providing insights into conformational changes and binding events at the nanoscale level. FRET relies on the principles of fluorescence and quantum mechanics, making it a valuable tool in the realm of quantum sensing for intracellular measurements.
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