Fig. 6: Schematic illustration of droplet forming and characterization of the picoliter droplet array.
From: Picoliter droplet array based on bioinspired microholes for in situ single-cell analysis

Gray, yellow, and green represent PDMS, oil, and liquid, respectively. a The process of droplet formation from the lotus chip: NOA molding, smearing aqueous solution and adding mineral oil. b The full view under optical microscopy and partial enlargement observation of the droplet array. c Droplet size distribution estimated from the image