fig1

Figure 1. Flexible devices for electrical, magnetic, optical, and ultrasonic stimulation. Figure “Multi-walled carbon nanotube electrode”^[8], reprinted with permission. Copyright 2022, Elsevier; Figure “Optoelectronic retinal prosthetic system”^[9], reprinted with permission. Copyright 2005, IOP Publishing; Figure “Piezoelectric nanogenerators”^[10], reprinted with permission. Copyright 2021, AAAS; Figure “Micro spiral coil”^[11], reprinted with permission. Copyright 2012, Springer Nature; Figure “Organic electrolytic photocell”^[12], reprinted with permission. Copyright 2018, John Wiley and Sons; Figure “Photoacoustic nanotransducers”^[13], reprinted with permission. Copyright 2020, Elsevier.