The fourth edition of the International Conference on Opto-Nano Electronic Materials (ICONMAT 2025) organised by the Department of Physics and the Centre for Excellence in Advanced Materials is being attended by over 71 research institutions worldwide. More than 40 scientists from leading research institutions in Italy, Spain, France, England, Scotland, Singapore, the United States, Japan, and India are presenting research papers at the conference. CUSAT Vice-Chancellor, Professor M. Junaid Bushiri, inaugurated ICONMAT 2025, and the Director of the Rajiv Gandhi Centre for Biotechnology, Professor Chandrabhas Narayana, released the abstract book of the research papers. Notable participants include Prof. Joaquim Puig Dolas from UPC Barcelona, Prof. M.K. Jayaraj, Dr. Aldrin Antony, Dr. Riju C. Isaac, Dr. Saji K.J., and Prof. Jin Jose from Leeds University. The conference will conclude on February 14.