Figure 3 | Scientific Reports

Figure 3

From: 3D hotspot matrix of Au nanoparticles on Au island film with a spacer layer of dithiol molecules for highly sensitive surface-enhanced Raman spectroscopy

Figure 3

Morphological and chemical properties of the AuNPs@BDMT@AuIF. (a) and (b) SEM images of the AuIF and the AuNP_35nm@BDMT@AuIF, respectively. (c) Raman spectrum of the BDMT@AuIF. The characteristic peaks of 1586, 1218, and 1167 cm−1 corresponds to ring stretching, CH2 wagging, and βC–H vibration modes of the BDMT SAMs, respectively. (d)–(f) AFM images of the AuNPs@BDMT@AuIF with different diameters of AuNPs. The white line profile inserted in each AFM image represents the height information along the line.

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