Figure 2

Recorded images of single-neuronal cell manipulation on the array of ring-shaped traps. (a) Incoming neuron (I) entering the 1^st trap. (II) The neuron is then immobilized in the 1^st trap electrode against a fluid flow. (III) While the neuron is trapped, a repelled particle continues to move in the flow of media. (IV) The released neuron is captured again in the 2nd trap. (V and VI) The neuron is trapped in the 3^rd and the 4^th ring trap in turn. (b) Bouncing motion of the neuron subject to a repulsive force. While the target neuron was trapped in the desired electrode, an incoming neuron was repelled by DEP force. When the incoming neuron reached the outside of the electrode, the repulsive force pushed the neuron out of the ring. Video is included in Supplementary Materials (Movie S1).