Table 1 The pH-dependent properties of metal nanoparticles produced by tryptophan reduction
From: The pH-Dependent Stucture and Properties of Au and Ag Nanoparticles Produced by Tryptophan Reduction
pH Trp→ | 2 | 6 | 10 |
|---|---|---|---|
pH Au ↓ | Size, nm | ||
2 | 70–90/100–130 | 50–70/100–130 | 60–80/100–130 |
4 | 50–70/100–130 | 90–130/> 600 | 10–25 |
6 | 20–30/100–130 | 30–40/200–400 | 10–20 |
Zeta potential, mV | |||
2 | +15.2 | +19.25 | +24.5 |
4 | +13.5 | −5.27 | −11.85 |
6 | −0.03 | −3.03 | −0.04 |
pH (resulting solution) | |||
2 | 2.2 | 2.5 | 2.5 |
4 | 2.5 | 3.9 | 7.5 |
6 | 2.5 | 6.4 | 7.6 |