Surfactants in Solution: 50th Anniversary Edition (SIS 2026)

Dear Colleagues,

The Surfactants in Solution (SIS) symposium series, inaugurated in 1976 in Albany, New York, has become a cornerstone event for the international colloid and interface science community. Over the past five decades, SIS has traveled across North America, Europe, Asia, South America, and Australia, evolving into one of the most influential global forums dedicated to surfactants, colloids, foams, emulsions, and interfacial systems.

The 25th edition (SIS 2026), held at the Faculty of Chemical Sciences of the Universidad Complutense de Madrid, marks the 50th Anniversary of the series. This major milestone celebrates SIS's scientific heritage, community spirit, and interdisciplinary impact. This Special Issue will gather original research and review contributions presented at SIS 2026, alongside additional submissions from the wider community.

The scope of this Special Issue covers all aspects of surfactants and interfacial phenomena, including fundamental studies, experimental and theoretical advances, and emerging applications in materials, formulation science, energy, health, and sustainability. Contributions linking molecular-level insights to macroscopic behaviour, as well as work addressing industrial and technological challenges, are particularly encouraged.

We look forward to receiving your submissions and to celebrating this historic anniversary edition with an outstanding collection of scientific contributions.

Dr. Eduardo Guzmán
Prof. Dr. Ramón G. Rubio
Prof. Dr. Francisco Ortega
Guest Editors

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