Figure 2: Nanomeshes made from two layers of block copolymer. | Nature Communications

Figure 2: Nanomeshes made from two layers of block copolymer.

From: Arbitrary lattice symmetries via block copolymer nanomeshes

Figure 2

SS-LZA allows fabrication of nanomaterials with morphologies not possible for conventional self-assembled diblock copolymers. In this example, double-layered arrays of nanowires with controlled hatching angle yield arbitrary rhombic lattices. (a) Top–down SEM image of a platinum grid prepared by two orthogonal SS-LZA steps (scale bar 1 μm). The insets show an FFT of the SEM (left) and the transmission X-ray diffraction pattern (right). (be) SEM images of various double-layered Pt nanomeshes (scale bars 200 nm). (b) False-coloured square lattice, with the first layer in blue and second in yellow. (c) Rhombic lattice obtained using a 66° angle between SS-LZA sweeps; inset shows an FFT of a lower magnification image. (d) 30° rhombic lattice with a cross-sectional SEM inset. (e) Two layers of the nanowires oriented in parallel direction tend to overlay; the cross-sectional SEM (inset) reveals the superimposed stack structure. (See Supplementary Figs 2–5 for wide area images.)

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