Kumamoto University is proud to announce that Mr. Takenobu Nakagawa, a Senior Technical Specialist has been awarded the 2026 Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (MEXT). Mr. Nakagawa received the Outstanding Support for Research Award in the Advanced Technical Support Category.

Photonically structured colors, characterized by high resolution and dynamic responsiveness, hold promising prospects in the field of information security. However, conventional patterning methods are often limited by high equipment costs and monotonous color outputs, which restrict their widespread adoption. To address these issues, this paper proposes a novel multi-color patterning method based on light-induced chemical crosslinking. By introducing light-initiated crosslinking molecules into anti-opal hydrogels, we developed a film that can be further regulated by photo-curing, enabling a “film formation first, then patterning” approach. The structural color hydrogels created using this method can display multi-color patterns, with a minimum line width of 15 μm, significantly enhancing their information-carrying capacity. Moreover, ultraviolet radiation can increase the degree of cross-linking, thereby inhibiting swelling behavior, enhancing tensile strength, reducing elongation at break, and causing the color of the inverse opal structure to shift toward blue or disappear. With inherent responsiveness to stress, temperature, and solvents, this approach enables dynamic information display and has excellent stability (able to cycle stably for more than 100 times). This work introduces a new method for patterning stimulus-responsive structural colors and opens up new possibilities for their use in applications such as ink-free printing, information encryption, and anti-counterfeiting.

In many types of rooms, sound reflecting off multiple walls muddies conversation, making it harder to understand. So, to control how sound travels in a room, researchers developed a patterns wall to improve the listening experience of deaf and hard-of-hearing individuals. They first conducted acoustic simulations to study how different surface textures influenced speech clarity. Then they designed and 3D-printed “tiles” that can be linked together to fit different room shapes and sizes. Po-Chun Chou will present these designs as part of the 190th ASA Meeting.