A superhydrophobic surface exhibiting a water-droplet contact angle of ca. 157° (see figure left) is generated from the self assembly of nanoscale clay platelets with attached fatty amine chains. The anionic high-aspect-ratio platelets self-align upon modification with the alkyl organics to form rough surfaces exhibiting the lotus-leaf effect. The right-hand figure shows the fractal surface with micrometer-scale roughness defined by the platelet building blocks.
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Lin et al. (2006) studied this question.
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