Lipid bilayers are thin, double-layered structures that form the basis of cell membranes. They are made up of phospholipid molecules, which have a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tail. The arrangement of these molecules creates a barrier that separates the inside of the cell from the external environment, allowing for the selective transport of substances in and out of the cell. Research in lipid bilayers focuses on understanding their structure, function, and dynamics in biological systems. Scientists study how lipid bilayers interact with proteins, ions, and other molecules to regulate various cellular processes such as signaling, transport, and cell division. This research is important for developing new drugs, understanding diseases, and engineering biomimetic materials for applications in drug delivery and biotechnology.