A Special Issue Dedicated to the 25th Anniversary of Centre of Super‐Diamond and Advanced Films (COSDAF), the City University of Hong Kong (CityUHK) (Adv. Funct. Mater. 21/2025)

Celebrating the 25 th Anniversary of COSDAF at CityUHK This special issue, contributed from members and friends of COSDAF, specially celebrates the 25 th Anniversary of COSDAF, coinciding with the 30 th anniversary of CityUHK. This special issue encompasses four main disciplines of COSDAFS: (i) Optoelectrical materials and applications; (ii) Energy‐related materials and applications; (iii) Catalytic materials; and (iv) Biomedical materials and applications. More details can be found in article number 2501049 by Qichun Zhang and co‐workers.