Table 1. Particle size distributions and surface area measurements.
| Volume weighed (μm) | Number weighed (μm) | BET (m2 g-1) | |||||
|---|---|---|---|---|---|---|---|
| Particle | d0.1 | d0.5 | d0.9 | d0.1 | d0.5 | d0.9 | |
| Ni-n | 2.8 ± 1.4 | 3.4 ± 2.1 | 4.0 ± 2.8 | 0.11 ± 0.05 | 0.14 ± 0.09 | 3.0 ± 2.1 | 6.41 |
| NiO-n | 0.70 ± 0.01 | 0.82 ± 0.03 | 2.2 ± 1.7 | 0.17 ± 0.07 | 0.74 ± 0.02 | 0.88 ± 0.01 | 102b |
| Ni-m1 | 1.4 ± 0.46 | 2.8 ± 0.34 | 7.2 ± 0.12 | 0.90 ± 0.83 | 1.3 ± 0.51 | 2.4 ± 0.63 | 1.05a |
| Ni-m2 | 1.0 ± 0.98 | 1.8 ± 0.26 | 4.0 ± 0.74 | 0.72 ± 0.61 | 1.1 ± 0.75 | 1.8 ± 0.67 | 2.15a |
Volume and number weighed particle sizes of Ni metal (Ni-n, Ni-m1 and Ni-m2) and Ni oxide (NiO-n) particles, after 1 h of incubation in cell medium (DMEM+), as well as particle specific surface areas (BET) at dry conditions. d0.1 = particle diameter at which 10% of particles are smaller; d0.5 = particle diameter at which 50% of particles are smaller (median); d0.9 = particle diameter at which 90% of particles are smaller.
a) [18]
b) [32]