Skip to main content
. 2025 Mar 21;11(12):eadt5888. doi: 10.1126/sciadv.adt5888

Fig. 3. Demonstration of PBs as a versatile liquid robot.

Fig. 3.

(A) Overall sequence of carrying out given missions. (B) PB I penetrating bars and engulfing a particle of FeCl3•6H2O (upper image), and returning by passing through bars again (lower image). (C) PB II skimming over water surface, engulfing a particle of KSCN, and returning. (D) Falling and merging of PBs. Two PBs with different cargoes fall from the cliffs without bursting. Then, the vertically applied acoustic radiation force causes the two PBs to merge. The merged PB turns dark red due to an internal reaction. (E) Discharging the inner content from the PB that bursts due to surfactant. The discharged liquid enters a hole to be collected by a vial situated beneath the hole. Scale bars, 5 cm (A) and 10 mm (B to E). To concurrently show the initial and final states of each process, a series of images were assembled in each panel.