50th Anniversary Conference OKINAWA COLLOIDS 2026

1. Langmuir Symposium

Harnessing interfacial energy enables the spontaneous organization of molecules and colloidal particles, thereby facilitating the low-energy fabrication of functional materials. This paradigm shift offers a compelling alternative to conventional material processing methods, which typically rely on gravity and are often energy-intensive. In light of this, we propose a renewed focus on interface-driven systems, where interfacial phenomena critically determine material structure and function, especially from a sustainability perspective. At the upcoming international symposium entitled with the prefix “Langmuir”—named after the premier ACS journal in colloid and interface science—we aim to engage in in-depth discussions on the fundamental principles governing interfacial systems and materials. This event will feature contributions from the editors and editorial advisory board members of Langmuir, providing a unique platform for academic exchange.

2. New Trends in Innovative Cross-Disciplinary Research Created by Interfacial Structure Analysis

In rapidly evolving fields of materials, biomaterials, and interface science, high-resolution structural observation based on updated scattering and microscopy techniques capable of covering a wide range of spatial length scales as well as an elaborate spectroscopic hydration analysis have transcended their role as convenient analytical tools. They are now recognized as innovative tools that enable us to discover new phenomena, simultaneously providing helpful guidelines for designing new materials/products. This symposium will bring together researchers from diverse fields, including biological observations, functional design of everyday products, life sciences, and cultural heritage restoration. We aim to provide a fascinating platform for cross-disciplinary discussions on the deeper interconnections between interfaces, microscopic structures, molecular/ion dynamics, and functional creation and integrations.

3. Microgravity Exploration of Colloid Science for Space Life

We are now in an era where humanity can consider living on other celestial bodies in the solar system as a realistic project and begin to move toward its implementation. Habitation in space is to live in an ultimate environment; in addition to the microgravity condition, all resources of materials and energies should be limited. This symposium explores the current advancement and future possibilities of colloid science and related technologies for space life.

4. Food Science from the Perspective of Colloid and Interface Science

Colloid and interface science simplifies systems to uncover fundamental phenomena, while food science investigates naturally complex materials to understand how processing shapes texture, stability, and function. Foams and emulsions—such as meringue, whipped cream, beer foam, and chocolate—highlight the crucial role of interfacial structures. This symposium focuses on structural observation as a shared theme, encouraging discussion of new methods and challenges at the intersection of colloid/interface science and food science.

5. Advances in Colloid and Surface Chemistry for Sustainable Polymer Materials

The development of sustainable polymer materials is one of the most urgent challenges in modern chemistry. In recent years, several emerging research areas have shown great potential in addressing this challenge. Many of these areas are deeply rooted in colloid and surface chemistry, including the design of functional nanostructured polymers, novel strategies for polymer recycling, and the analysis of the fate and behavior of polymers released into the environment.

This symposium aims to bring together leading researchers from diverse but interrelated fields to share the latest advances and explore how colloid and surface chemistry can drive innovation in sustainable polymer science and materials engineering.

6. Nanocelluloses: Science and Technology

Nanocellulose is a biological soft matter, which is sustainable and biodegradable, and this nano-scaled material is attracting attention in today’s society as we strive for carbon neutrality and microplastic-free. The symposium will invite reports on basic research on nanocellulose materials such as nanofibers, nanocrystals, and nanonetworks, as well as their applications to daily necessities, cosmetics, and foods and their use in medical treatments. Therefore, this is an interdisciplinary symposium that is of sufficient interest not only to researchers already involved in nanocellulose, but also to interesting students, academic researchers, and corporate researchers.

7. Nanostructures-Based Interfacial Energy and Separation Science

The symposium offers a fruitful platform for active scientists who have devoted themselves to study new nanostructured materials and their unique functions for energy and separation technologies. We invite worldwide scientists from diverse backgrounds, including nanoporous and low-dimensional materials, adsorption, catalysis, electrochemistry, and separation, to participate in this symposium. Through focused discussions grounded in common interfacial science and engineering principles, we aim to foster new advances in these fields. Also, the attendees of this symposium should enjoy the close symposium on Novel Theories and Measurements on Nanoconfined Molecules and Ions.

8. Novel Theories and Measurements on Nanoconfined Molecules and Ions

Nanospace concentrates various molecules and ions without consuming energy. While the adsorbed state is quite universal, it is an extremely interesting colloidal environment in which solid, liquid, and gas phases at the nanoscale exist stably, with the interfaces in close contact. In this symposium, we will focus on the science of molecules and ions confined in nanospaces from the aspects of novel theories and measurement techniques. We believe that deep discussion on the specificity and universality of nanospaces from a basic perspective will lead to the new era of nanospace science.