Figure 1.

(a) Schematic of the template-stripping technique for fabricating surface-patterned cQD films. (b) Photograph of ultraviolet-illuminated patterned films of red-, green-, and blue-emitting cQDs that were fabricated using template stripping. On the left-hand side, the corresponding templates of 2 × 2 cm each are shown. (c) Fluorescence microscopy image of an array of bull’s-eye gratings of 300 concentric circles each on a red-emitting cQD film. The pitch of these gratings varies from Λ = 550 nm on the left to Λ = 300 nm on the right with 50 nm decrements. (d,e) Scanning electron micrographs at different magnifications of a bull’s-eye grating with a pitch of 550 nm. Scale bars are 2 μm and 200 nm.