Figure 14.

Switching between superhydrophobicity and superhydrophilicity of an elastic polyamide film with a triangular net-like structure. (a) Before biaxial or after unloading, the CA is about 151°. (b) When the film was extended, the CA is around 0° (i.e. reversible superhydrophobic/superhydrophilic transition of the films by biaxial extension and unloading). Reprinted with permission from [40]. Copyright Wiley-VCH Verlag GmbH & Co. KGaA

Verplanck et al. Nanoscale Research Letters 2007 2:577-596   doi:10.1007/s11671-007-9102-4