Table 1.
Hydrodynamic diameter (dH) and zeta potential (ζ) of silver (AgNPs) and gold (AuNPs) nanoparticles stabilized with cysteine (CYS) or glutathione (GSH). The dissolution behavior was evaluated in ultrapure water (UPW), the cell culture medium used for L929 cells (EMEM) and the medium used for cultivation of Daphnia magna (SCM) after 24 h.
| Nanoparticles | dH [nm] (% mean volume) | ζ [mV] | % free metal ions | ||
| UPW | EMEM | SCM | |||
| CYS AuNPs | 10.6 ± 2.4 (41%) 36.3 ± 8.6 (59%) |
−46.8 ± 2.1 | no dissolution | ||
| CYS AgNPs | 8.0 ± 0.9 (100%) | −56.9 ± 7.5 | 0.13 | 0.22 | 0.26 |
| GSH AuNPs | 7.4 ± 2.1 (38%) 65.1 ± 13.8 (62%) |
−58.0 ± 3.8 | no dissolution | ||
| GSH AgNPs | 6.0 ± 1.2 (100%) | −50.9 ± 2.3 | 0.10 | 0.77 | 0.64 |