Fig. 4: Experimental validations for the prediction.
From: Active generation and magnetic actuation of microrobotic swarms in bio-fluids
a The generation processes of the medium-induced and the MF-induced swarms in gastric acid, FBS, plasma, HA, whole blood and vitreous humour, respectively. Because the red blood cells in whole blood block most of the light from an optical microscopy, ultrasound imaging is applied for the observation. The scales bars represent 800 μm. b The assembly rate, which indicates the percentage of swarm central area after the generation process in different bio-fluids. c The relationship between the aspect ratio of the MF-induced swarms and the input amplitude ratio. Demonstrations of the elongation of the ribbon-like swarms in DI water, FBS, gastric acid and blood plasma are presented in the insets with blue, red, yellow and purple rectangles, respectively.
