Research / 2021 / Article / Fig 3

Research Article

Self-Navigated 3D Acoustic Tweezers in Complex Media Based on Time Reversal

Figure 3

3D acoustic tweezers for multiple particles: (a) schematic of trapping two PDMS particles in 3D space simultaneously; (b–e) optical images (b, d) of two trapped particles (dyed blue) and corresponding simulated 3D beam profile (c, e) in the top and side view, respectively; (f) schematic of manipulating ten PDMS particles to transform from a circle to a pentagon and rotate in clockwise and counterclockwise directions; (g–j) optical images of ten trapped particles arranged into a pentagon (g) and a circle (i) in the top view and the corresponding simulated 3D beam profiles (h) and (j) respectively; (k) schematic of manipulating a large number of PS particles to display patterns of the pentagon and snowflake acoustic fields; (l–o) optical images of the pentagon pattern (l) and snowflake pattern (n) in the top view and the corresponding simulated 3D beam profiles (m) and (o), respectively. The acoustic manipulation processes for the two types of multiple particles are shown in Movie S2. All scale bars are 10 mm.