Fig. 2.

a Schematic diagram of material deposition on assembled PS array monolayer. Where θ is the deposition angle, which is defined as the material vapor beam with respect to the substrate normal, and Φ is the azimuth angle with respect to the PS array monolayer. b The measured CD spectra of LHCPO (green) and RHCPO (aubergine) with θ = 20°, k _{1, 2, 3, 4} = 8, 25, 40, and 55 nm, respectively, and ΔΦ = ±60°. The insets are the related CPO SEM images