Figure 6. NW structures act as an active adsorption surface.

(a) an optical microscope image showing particles captured by wrinkles. The film was coated onto a glass substrate at a spinning rate of 1000 rpm (t ~ 12.4 µm) (see Supplementary Fig. S4 for results obtained at other spinning rates). (b) particle size distributions of the original PS colloids and the particles size-selected by wrinkle structures prepared at different spinning rates. Sieve-1: 500 rpm (t ~ 23.1 µm); Sieve-2: 1000 rpm (t ~ 12.4 µm); Sieve-3: 1500 rpm (t ~ 9.5 µm).