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. 2014 Mar 5;9(3):e91087. doi: 10.1371/journal.pone.0091087

Figure 4. Self-cleaning ability of the skin of B. rhinoceros.

Figure 4

A–C, Photographic images of an exuvium of B. rhinoceros. A, The exuvium at daylight before dusting it with the redwop. B, The exuvium under black light after dusting it with the redwop. C, The same exuvium under black light after fogging it for 30 min at an inclination of 20°. D, SEM-image of the B. rhinoceros scale with black and pale regions after contamination with the redwop dust and subsequent fogging. The (black) areas showing the characteristic micro- and nanostructure are free of the redwop particles. The (pale) areas showing the inconspicuous microstructure and no nanostructures are covered by a dense layer of the redwop particles.