Schematic diagram of a proposed electromagnetically driven on-chip micromanipulator: When a bubble on the tip of the micromanipulator is acoustically excited at its natural frequency by a piezoactuator attached beneath the chip, it oscillates and simultaneously generates a radiation force, called a Bjerknes force, which results in pulling a neighboring object onto its surface, as shown in Fig. 1(b). The captured object can be transported to any location with the micromanipulator actuated by an external magnetic controller consisting of precisely controllable 2D traverse and twin permanent magnets (Fig. 1(c)). When the object carried with the micromanipulator reaches a target location, it can be released from the bubble simply by turning the piezoactuator off and transporting the micromanipulator to the original position, as shown in Fig. 1(d).