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The experimental parameters and stabilities of different samples.
| Sample no. | Solvent | HAuCl4 (mM) | Stabilizer/Au (mol/mol) | NaBH4/Au (mol/mol) | Stability |
|---|---|---|---|---|---|
| 1 | [Bmim][PF6] | ||||
| 2 | [Bmim][PF6] | 1 | 10 | ≤2 days | |
| 3 [19] | [Bmim][PF6] | 1 | 5 (1-Methylimidazole) | 10 | 2 weeks |
| 4 | [Bmim][PF6] | 1 | 5 (CTABr) | 10 | More than 5 months |
| 5 | [Bmim][PF6] | 2 | 5 (CTABr) | 10 | 1 week |
| 6 | [Bmim][PF6] | 3 | 3 (CTABr) | 10 | ≤4 days |
| 7 | [Bmim][PF6] | 4 | 3 (CTABr) | 10 | ≤4 days |
