Table 2.
Equivalent diameters from DLS with polydispersity index (PDI), UV–Vis spectroscopy, and spICP-MS of nanoparticles in mixtures of water and nanoparticulate silver
| H2O | Day 0 | Day 1 | Day 4 | Day 7 | |
|---|---|---|---|---|---|
| AgNps-20 | deq (nm, DLS) | 180 ± 12 | 161 ± 11 | 147 ± 36 | 157 ± 1 |
| PDI (DLS) | 0.21 ± 0.03 | 0.42 ± 0.06 | 0.42 ± 0.07 | 0.24 ± 0.01 | |
| deq (nm, Uv-Vis) | 8 | 18 | 20 | 15 | |
| deq (nm, spICP-MS) | 34a | 34a | 34a | 24b | |
| AgNPs-50 | deq (nm, DLS) | 60 ± 1 | 62 ± 1 | 63 ± 1 | 62 ± 1 |
| PDI (DLS) | 0.15 ± 0.02 | 0.13 ± 0.01 | 0.12 ± 0.02 | 0.14 ± 0.01 | |
| deq (nm, Uv-Vis) | 60 | 58 | 59 | 57 | |
| deq (nm, spICP-MS) | 42 | 41 | 39 | 39 | |
| AgNPs-75 | deq (nm, DLS) | 103 ± 1 | 100 ± 1 | 101 ± 1 | 104 ± 1 |
| PDI (DLS) | 0.05 ± 0.02 | 0.06 ± 0.02 | 0.05 ± 0.02 | 0.05 ± 0.01 | |
| deq (nm, Uv-Vis) | 77 | 77 | 77 | 74 | |
| deq (nm, spICP-MS) | 54 | 44 | 34 | 40 | |
| AgNPs-100 | deq (nm, DLS) | 101 ± 1 | 105 ± 1 | 105 ± 1 | 109 ± 1 |
| PDI (DLS) | 0.07 ± 0.01 | 0.07 ± 0.01 | 0.04 ± 0.01 | 0.06 ± 0.02 | |
| deq (nm, Uv-Vis) | 89 | 90 | 92 | 90 | |
| deq (nm, spICP-MS) | 71 | 75 | 67 | 77 |
a
Particle peak signals overlap with the ionic peak signals.
b
Few particle signals were present.