Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Figure 1

5 l drop of water (a) on glass substrate (treated with Piranha solution), (b) on nontreated glass substrate, (c) on polystyrene (PS) substrate, and (d) on hydrophobic TEFLON substrate.

(a)

(b)

(c)

(d)