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Dimensions and optical properties of AuNRs, Au@Pt−Ag+, and Au@Pt+Ag+.
| Nanorods | Length (L, nm) | Middle width (Wm, nm) | Tip width (Wt, nm) | Aspect ratio (L/Wm) | LSPR λ (nm) |
| AuNRs | 26.8 ± 3.2 | 6.8 ± 1.1 | 6.8 ± 1.1 | 3.9 | 778 |
| Au@Pt−Ag+ | 32.6 ± 2.9 | 9.4 ± 1.4 | 10.1 ± 0.7 | 3.5 | 738 |
| Au@Pt+Ag+ | 29.2 ± 2.8 | 6.8 ± 0.6 | 10.6 ± 1.5 | 4.3 | 836 |
