Figure 2
From: Capillary wave tweezer
Collection of melamine resin particles (\(r=\)5 \(\upmu \hbox {m}\)) under the action of capillary wave at different amplitudes and plate separations (d), corresponding to different actuation frequencies and a liquid height \(h_l=\)0.75 \(\hbox {mm}\). The orange lines indicate the edge of the upper plates or the two nodes of the capillary wave. In the image with \(d=\)6 \(\hbox {mm}\) and \(V_0=\)5 \(\hbox {V}\), the blue dashed line represents the particles collected stably underneath the central capillary wave node and the red dashed line represents the the particles drawn underneath the upper plates.
