Figure 2 | Scientific Reports

Figure 2

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 2

Morphological, chemical, and optical characteristics of the AuNPs. (a) TEM images of AuNPs according to reaction time. The scale bar is 20 nm. (b) EDS line-scan analysis of Au L-edge distribution across the AuNP_50nm. (c) Size distribution of the AuNPs as a function of reaction time. (d) UV–Vis absorption spectra of the AuNPs. The inset indicates a magnified view near the absorption peaks.

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