a–k: Fluorescence microscopy images of 50 g PFH droplets with shells of different compositions (mol% DPPC:DOPC:Cholesterol), 100:0:0 (a), 60:0:40 (b), 50:10:40 (c), 70:20:10 (d), 60:30:10 (e), 50:30:20 (f), 40:30:30 (g), 40:40:20 (h), 47.5:47.5:5 (i), and 30:60:10 (j). Scale bar: 5 μm; k: Sketch of ternary compositions of monolayers, showing S-Lo (I), Lo-Ld (II), and S-Ld (III) regions.