Fig. 4: Characterization of two-stage film growth in D(C7CO)-BTBT film. | Nature Communications

Fig. 4: Characterization of two-stage film growth in D(C7CO)-BTBT film.

From: Enabling three-dimensional porous architectures via carbonyl functionalization and molecular-specific organic-SERS platforms

Fig. 4

a Cross-sectional and top-view SEM images of the nanostructured films of D(C7CO)-BTBT for short (~600 ± 50 nm thick film) and full (~5.5 ± 0.2 μm thick film) deposition conditions, photos of the water droplets on them with the corresponding contact angles (CAwater). The corresponding edge-on and face-on-oriented molecular domains are shown in blue and red, respectively. Scale bars are shown separately for each SEM image. b The θ-2θ XRD patterns of the nanostructured films of D(C7CO)-BTBT for short (~600 ± 50 nm thick film) and full (~5.5 ± 0.2 μm thick film) deposition conditions along with the assigned out-of-plane crystallographic planes, BFDH (Bravais, Friedel, Donnay, and Harker) theoretical crystal morphologies and the relative directions of “edge-on” and “face-on” oriented molecular packings. Note that herein the terms “edge-on (shown in dark blue)” and “face-on (shown in red)” refer to the molecular orientations with respect to the substrate plane.

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