This work was supported in part by the NSF under Grant No. CBET-0651780, the start-up funds from the University of Florida, and the UF Research Opportunity Incentive Seed Fund.
Applied Physics Letters
Biomimicry, Optical coatings -- Design and construction, Fluoropolymers, Colloidal crystals
The authors report a simple self-assembly technique for fabricating antireflection coatings that mimic antireflective moth eyes. Wafer-scale, nonclose-packed colloidal crystals with remarkable large hexagonal domains are created by a spin-coating technology. The resulting polymer-embedded colloidal crystals exhibit highly ordered surface modulation and can be used directly as templates to cast poly(dimethylsiloxane) (PDMS) molds. Moth-eye antireflection coatings with adjustable reflectivity can then be molded against the PDMS master. The specular reflection of replicated nipple arrays matches the theoretical prediction using a thin-film multilayer model. These biomimetic films may find important technological application in optical coatings and solar cells.
Linn, N. C., Sun, C., Jiang, P., & Jiang, B. (2007). Self-assembled biomimetic antireflection coatings. Applied Physics Letters, 91(10), 101108