Noncovalent Spiropyran Coatings for Photoinduced Wettability Switching

Figure 6

Surface stability tests: (a) sample after scratch test; (b) sample (bottom) after attaching and peeling off an adhesive tape (top). The transparent regions are due to holding the samples with tweezers in the candle-soot coating process. (c) Sample under flowing water.

(a)

(b)

(c)