Fig. 1 | Nature Communications

Fig. 1

From: Molecular engineering of organic semiconductors enables noble metal-comparable SERS enhancement and sensitivity

Fig. 1

Fabrication and characterization of nanostructured DFP-4T films. a Chemical structures of the 4T-based semiconductors of this study depicting the extension of π-conjugation as a function of (σ- vs π-) substituents and torsion angles, and schematic illustration of the PVD process for fabricating the nanostructured SERS films. b SEM images of the DFP-4T films (top inset shows the optical image of the DFP-4T film). c Optical image of a water droplet on the DFP-4T film indicating the water contact-angle. d The θ−2θ XRD pattern of the DFP-4T film. e Schematic illustration of the proposed molecular packing diagram in the out of plane direction showing representative π-π interactions (red dashed lines).

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