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. 2018 Jan 15;8(6):3143–3150. doi: 10.1039/c7ra12410d

Fig. 4. (A) SEM image of the hollow gold shell nanoparticles substrate. (B) Surface-enhanced Raman scattering mapping of the substrate using the surface-enhanced Raman scattering peak intensity (592 cm−1) of NBA. The acquisition time was 10 s, and the laser power was 2 mW.

Fig. 4