Fig 1.
Droplet contact line dynamics.
(a) Normalized CR, CA vs. time. (b) Equivalent polar plot (MOE plot) of (a) with nomenclature.
Fig 2.
Theoretical sketch for MOE plots in three different modes.
(a) CCR (b) CCA (c) SS.
Fig 3.
(a) For different substrates (hydrophobic and hydrophilic) with three distinct modes of evaporation. (b) For PDMS only. Non-dimensional time coordinates (t/te) are also marked, where te is evaporation duration. Standard deviation error across repeated trials is within 4%.
Fig 4.
Mode of evaporation factor (MOEf).
(a) Determination of MOEf using area measurements from MOE plot. Here, , stands for area of the sector x0y. As
is a non-circular arc, it is segmented into small sectors at the data points between c and d. Circular arc assumption is applied to each sector and area of sector c0d is obtained as sum of all. See S1 Supporting Information for details about area calculation ar(SS) (b) MOEf for the substrates in Fig 3. (c) MOEf plot for droplets with different initial volumes.
Fig 5.
Physical significance of MOEf.
(a) Variations in evaporation duration for different MOEf values (experiments from three different substrates with different initial volumes) (b) Theoretical plot for variations in droplet evaporation time for strictly CCR and CCA modes in all possible initial contact angles (reprinted by permission from [24]). (c) MOE plot and corresponding MOEf with evaporation time for data obtained from Shin, Dong Hwan, et al. [25]).