Fig. S9.

Narrow distribution in size of the entrained brine microdroplets. (A) Brine (1.37 M sodium chloride) microdroplets deposited on the hydrophilic regions due to local dewetting of the aqueous thin film formed during viscous withdrawal at a withdrawal speed of $U=40\hspace{0.5em}\mathrm{mm}/\mathrm{s}$. (B) The bar plot quantifies the narrow size distribution ($38\mathrm{\pm }4\hspace{0.5em}\mu \mathrm{m}$ in diameter) of the entrained brine microdroplets shown in A.