Colloids and molecular assemblies provide a powerful platform to design functional materials where structure and properties can be finely tuned through interfacial control and self-organization. Recent advances in polymer surfaces, colloidal interfaces, and supramolecular structures highlight how nanoscale interactions can be translated into emergent functions at larger scales. These innovations are driving new directions in soft materials science, where precise surface engineering and controlled assemblies enable versatile platforms for adaptive, sustainable, and multifunctional systems. This session will bring together recent progress in molecular design, advanced synthetic strategies, and interfacial characterization, with a focus on understanding and exploiting the unique behaviors of polymers, colloids, and complex supramolecular structures. Emphasis will be placed on bridging fundamental insights with scalable methodologies, enabling pathways toward innovative soft material systems with tunable properties and broad technological impact.