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. Author manuscript; available in PMC: 2013 Dec 12.
Published in final edited form as: J Am Chem Soc. 2012 Nov 26;134(49):20139–20145. doi: 10.1021/ja309044z

Figure 6.

Figure 6

Representative SEM images demonstrating the adhesive capabilities of the fabricated catechol microstructures with silica particles. (a) Silica particles, 1 µm diameter, employed in experiments; (b) Fabricated catechol microstructures, 10 µm diameter and 20 µm height; (c) Silica particles directly transferred to tops of catechol-functionalized pillars; (d) Silica particles directly transferred to tops of silyl-protected catechol-functionalized pillars; (e) Strong adhesion demonstrated by the stability of assembled silica particles on catechol-functionalized pillars after sonication and extensive washing; (f) Loss of adhesion for silyl-protected catechol-functionalized pillars after sonication and extensive washing. Scale bars in small inserts of (b) to (f) are 50 µm.