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(a) Side- and bottom-view images of two coalescing diethylene glycol (DEG) drops (μd = 38.5 mPa·s, ρd = 1118 kg/m3, σ = 43.16 mN/m, and R = 240 μm) on indium tin oxide (ITO) substrate (θ = 56°). (b) Log–log scale plot of r(t) and h(t). Here, tc = 3μdR/4σtan4θ. Adapted with permission from [18]. Copyright 2012 American Chemical Society.
