Figure 3
From: Emergence of different crystal morphologies using the coffee ring effect
Macroscopic patterns at fixed ϕ0 = 2.8 wt% when the temperature and humidity are (a) 22 °C and 67%, (b) 22 °C and 50%, and (c) 22 °C and 20 ± 4%. The evaporation rates are (a) 0.0018 mm3/s, (b) 0.0035 mm3/s, and (c) 0.0056 mm3/s. We observe a dendritic pattern [(a) and (b)] for smaller β and concentric circles [(c)] for larger β. Scale bar corresponds to 0.1 mm.
