Figure 3: Acoustic radiation and acoustic streaming force analysis on particles with different sizes.
From: Rotational manipulation of single cells and organisms using acoustic waves
Image sequence demonstrating (a–d) acoustic microstreaming of 2, 5, 7 and 10 μm polystyrene particles and (e) subsequent particle trapping of 15 μm particles at excitation frequency and amplitude of 70 kHz and ∼3 μm, respectively. (f) Plots of acoustic streaming (triangle, FAS) and radiation (FR) forces. The radiation forces for three different particle-microbubble centre are plotted at 42.5 (circle), 45 (square) and 47.5 μm (diamond). (g) The ratio of acoustic radiation to streaming forces at 70, 100 and 140 kHz excitation frequencies are plotted. The insets of g shows 10 μm polystyrene particles being trapped (at 140 kHz) and following the streaming flows (at 70 kHz). Error bars represent standard deviation (n⩾5). Scale bar, 50 μm.
