What is a single layered cell membrane?

A single-layered cell membrane, often referred to as a monolayer, consists of a single layer of phospholipids arranged with their hydrophilic heads facing outward and hydrophobic tails oriented inward. This structure can be found in certain types of cells or artificial lipid membranes, where it serves as a barrier that regulates the movement of substances in and out of the cell. Unlike the more common double-layered (bilayer) membranes, a monolayer may have unique properties and functions, particularly in specialized applications such as biOSensors or in lipid monolayer studies.