2sec: approach to the resonant frequency, particle start to detach but not entirely.
8 sec: near the resonant frequency
10sec : No adhered particle, maximum particle movements
10 ~ 26 sec: keep running the PZT near the resonant frequency
26sec: No driving signal, ready to demonstrate pulsing
30sec: start to pulse the PZT transducer
42sec: Stop experiment, resting particle