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. Author manuscript; available in PMC: 2013 Dec 24.
Published in final edited form as: Spectroscopy (Springf). 2012 Jun 1;27(6):s8–31.

Figure 1.

Figure 1

A scanning electron micrograph image of the Au nanoparticle covered SERS substrate produced by an Au ion doped sol-gel process. Clusters of 1–15 ~80 nm Au particles are evident on the surface of the SiO2 SERS chip.