Fig. 2. (a) Schematics of the charge-induced segregation of colloidal silica-DNA nanoparticles (SiNP-DNA) dispersed in PBS buffer containing 10 mM NaCl; (b–e) fluorescence images of W/FO droplets in the presence of three different surfactants, PICO-SURF (b and d), KRYTOX (c) and M4SURF (e). Note that the droplets in (c) and (e) were formed from the droplets in (b) and (d) after in situ addition of KRYTOX and M4SURF, respectively. Scale bars are 100 μm.
