A micelle is a spherical aggregate of surfactant molecules in a liquid. The surfactant molecules arrange themselves so that their hydrophobic tails are clustered together in the core of the micelle, while their hydrophilic heads are exposed to the surrounding liquid. Micelles are important in various applications, including detergency, emulsion polymerization, and drug delivery.

胶束是液体中表面活性剂分子的球形聚集体。表面活性剂分子排列成它们的疏水尾聚集在胶束的核心，而它们的亲水头暴露于周围的液体中。胶束在各种应用中都很重要，包括洗涤剂、乳液聚合和药物输送。