Figure 2
From: Tuning Interior Nanogaps of Double-shelled Au/Ag Nanoboxes for Surface-Enhanced Raman Scattering

TEM images of the double-shelled Au/Ag nanoboxes with four gap sizes: (A–C) 1.2 nm, (D–F) 2.5 nm, (G–I) 8.0 nm and (J–L) 15.6 nm.
From: Tuning Interior Nanogaps of Double-shelled Au/Ag Nanoboxes for Surface-Enhanced Raman Scattering

TEM images of the double-shelled Au/Ag nanoboxes with four gap sizes: (A–C) 1.2 nm, (D–F) 2.5 nm, (G–I) 8.0 nm and (J–L) 15.6 nm.