Fig. 1. Procedure for the formation of 3D hierarchical hybrid nanostructure by 2-step nano-transfer printing (n-TP). (Step 1) Formation of polymeric replica pattern. (Step 2) Repetitive pattern transfer process using a n-TP.
Fig. 2. Pattern formation of cross-bar hybrid structures by twice n-TP process. Transfer-printed Pt cross-bar array with a width of (a) 2 mm / 2 mm and (b) 1 mm / 250 nm. Well-ordered cross-bar pattern of (c) Pt 2 mm / WO3 2 mm and (d) Pt 1 m / WO3 250 nm line width.
Fig. 3. Highly ordered 3D hybrid pattern on a flexible PI film. (a) Schematic illustration of multi-stacked Pt triangle pattern. Photo images of triple-stacked (b) Pt triangle pattern and (e) Pt/WO3 hybrid nanostructure. (c) SEM image of Pt triangle pattern (line width: 1 mm-2 mm-250 nm). (d) Procedure for formation of Pt/WO3 hybrid nanostructure using a n-TP process. (f) Structural SEM analysis of Pt-WO3-Pt pattern with a width of 1 mm-1 mm-250 nm.
Fig. 4. Distribution of line-width for Pt-WO3-Pt hybrid nanostructure on PI.
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