Table 1 Physicochemical characteristics of pristine Ag ENMs
From: Is the toxic potential of nanosilver dependent on its size?
Name | Ag ENMs 50Â nm | Ag ENMs 80Â nm | Ag ENMs 200Â nm |
|---|---|---|---|
Shape | quasi spherical | quasi spherical | quasi spherical |
Concentration | Â | Â | Â |
[% wt/wt] | 1 | 1 | 1 |
[ENMs/ml] | 3.91×1013 | 1.03×1013 | 1.94×1012 |
Specific surface area [m 2 /g] | 1.37 × 101 | 7.56 | 3.87 |
Size/ size distribution & aggregation/ agglomeration state [ nm] | DLS: 74.5 ± 1.2 | DLS: 101.3 ± 1.5 | DLS: 272.5 ± 2.2 |
PDI= 0.130 | PDI= 0.115 | PDI= 0.136 | |
TEM: d50 = 55; d90 = 62 | TEM: d50 = 78; d90 = 96 | TEM: d50 = 168; d90 = 255 | |
AC: d50 = 43; d90 = 78 | AC: d50 = 77; d90 = 100 | AC: d50 = 150; d90 = 380 | |
Crystal structure | cubic | cubic | cubic |
Surface Chemistry [Atom%] | XPS: | XPS: | XPS: |
C:48.6, Ag:25.6, O:15.9, N:7.7, Na:2.2 | C:59.1, O:17.5, Ag:15.9, N 7.5 | C:58.1, O:18.0, Ag:15.4, N:7.5, Na:1.0 | |
SIMS: | SIMS: | SIMS: | |
Ag, Na, K, Ca, CxHyOz | Ag, Cl, CxHyOz | Ag, Na, K, CxHyOz | |
Surface charge [mV] | - 17.5 ± 0.5 | - 12.5 ± 0.5 | - 5.5 ± 0.5 |
pH | 5.9 | 5.9 | 6.0 |