Self-assembled colloidal aggregates are made up of nano- or micrometer-sized particles dispersed in a continuous phase that organize into ordered structures due to intrinsic physical and chemical interactions, like electrostatic forces, hydrophobic/hydrophilic interactions, Van der Waals forces, and hydrogen bonds. These systems are stable and form a wide variety of structures, including micelles, vesicles, liquid crystals, and emulsions. Their ability to create sophisticated materials makes them valuable in various fields, including materials science, pharmacology, biotechnology, medicine, food technology, and cosmetics Despite their advantages, challenges remain in achieving precise control over the self-assembly process. Design and Applications of Self-Assembly Aggregates - From Micelles to Nanoemulsions is a collaborative effort by different authors, exploring research on these microheterogeneous systems and their diverse applications.