Graphene-polymer nanofibers enable optically induced electrical responses in stem cell-derived electrically excitable cells and brain organoids. - LaMontagne, Erin; Savchenko, Alex; Gonzalez, Gisselle; Vatsyayan, Ritwik; Martin-Burgos, Blanca; Puppo, Francesca; Biagi, Diogo; Papes, Fabio; Dayeh, Shadi A.; Muotri, Alysson R.; Engler, Adam J. (Biomaterials, 2025)