fluorescence correlation spectroscopy

Fluorescence correlation spectroscopy (FCS) is a highly sensitive technique used to study the movement and interactions of molecules. It works by shining a specific light on a small volume of a sample, causing fluorescent molecules to emit light. By analyzing the fluctuations in the intensity of this emitted light over time, scientists can determine how fast the molecules are moving, their concentration, and even how they interact with each other. FCS is valuable in fields like biology and chemistry, helping researchers understand processes at the molecular level, such as protein dynamics and cellular interactions.