Naturally the lipids aggregated and formed vesicles. Liposomes are basically small vesicles whose membrane resembles that of a lipid bilayer. In fact, liposomes can be created from the same types of phospholipids found in cell membranes. Not all lipids in liposomes are naturally occurring, some are synthetic.

Where do liposomes form?

They typically form after supplying enough energy to a dispersion of (phospho)lipids in a polar solvent, such as water, to break down multilamellar aggregates into oligo- or unilamellar bilayer vesicles. Liposomes can hence be created by sonicating a dispersion of amphipatic lipids, such as phospholipids, in water.

Where are liposomes used?

A liposome is a tiny bubble (vesicle), made out of the same material as a cell membrane. Liposomes can be filled with drugs, and used to deliver drugs for cancer and other diseases. Membranes are usually made of phospholipids, which are molecules that have a head group and a tail group.