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Relative atomic concentrations of Au, Ag, and S in Au–Ag nanocages before and after reacting with 1 mM mPEG-SH at different concentrations. The reaction time was 24 h, and the analysis was carried out using EDS
| Atomic concentration (%) | |||
|---|---|---|---|
| Au | Ag | S | |
| Before etching | 19.2 ± 0.1 | 80.8 ± 0.1 | 0 |
| After etching | 21.6 ± 1.0 | 58.3 ± 1.0 | 20.1 ± 1.1 |
