fig8

Figure 8. Multi-field manipulation. (A) EDL-based electric actuation of Galinstan droplets in alkaline (left) and acid solution (right)^[39]. Reprinted with permission. Copyright 2019, American Chemical Society; (B) LM nano-swimmers propulsion via acoustic field^[56]. Reprinted with permission. Copyright 2018, American Chemical Society. EDL: Electric double layer; LM: liquid metal; PC: personal computer; PTFE: polytetrafluoroethylene.