Surfactants are surface-active agents that can be classified as anionic, cationic, zwitterionic, or nonionic based on their hydrophilic and hydrophobic properties. They are commonly used in cleaners, personal care products, and other applications due to their ability to reduce surface tension between liquids and solids. Cationic surfactants in particular show promise as antifungal agents and are expected to experience strong market growth. Model membrane systems are useful for studying the antifungal mechanisms of amphiphilic compounds like surfactants at the plasma membrane level.