Table 1. List of Nanoparticles Studied.
| abbreviation | nanomaterial | size | aggregate size (nm)a | electrophoretic mobility μ μm/(V/cm)-s) | source |
|---|---|---|---|---|---|
| aminofullerene | amine functionalized fullerene | N/Ab | 212.8+60.3c 531.8+86.3d |
+0.52+0.04e -1.14±0.06d |
Prof. Pedro Alvarez's lab, Rice University |
| CB | carbon black | diameter: 42 nm | 272.2+21. 1f | -2.49+0.04e | Fisher Scientific #50-901-08775, Waltham, MA |
| CeO2 | cerium oxide nanopowder | diameter: < 25 nm | 90.9+6.0c | +2.41+0.16e | Aldrich #544841, St. Louis, MO |
| 688.3+93.3d | -1.10±0.09d | ||||
| fullerol | fullerol (C60(OH)x(ONa)y, x+y=24,y=6-8) | N/A | 148.5+22.0c | -0.82+0.04e | MER, Tucson, AZ |
| 376.1+38.5d | -0.23±0.05d | ||||
| GO | graphene oxide | N/A | 601.2+52.2c | -2.63+0.10e | Prof. Ajayan's lab, Rice University |
| graphene | graphene | N/A | 342.4+26.2d | -2.68+0.12d | Prof. Ajayan's lab, Rice University |
| MWNT-15-5 | multi-walled carbon nanotubes | outer diameter: 15+5 nm; length: 1-5 μm | 483.9+37. 1g | -2.67+0.05e | Nanolab, Waltham, MA |
| MWNT-15-20 | multi-walled carbon nanotubes | outer diameter: 15+5 nm; length: 5-20μm | 606.4+40.7g | -2.54+0.04e | Nanolab, Waltham, MA |
| MWNT-30-5 | multi-walled carbon nanotubes | outer diameter: 30+15 nm; length: 1-5μm | 411.6+50.2 g | -2.67+0.05 e | Nanolab, Waltham, MA |
| MWNT-COOH | carboxylated multi-walled carbon nanotubes | outer diameter: 15+5 nm; length: 1-5μm | 75.9+10.6c | -2.97+0.09e | Nanolab, Waltham, MA |
| MWNT-NH2 | amine functionalized multi-walled carbon nanotubes | outer diameter: 15+5 nm; length: 1-5μm | 361.1+18.7 g | -2.50+0.09 e | Nanolab, Waltham, MA |
| MWNT-OH | hydroxylated multi-walled carbon nanotubes | outer diameter: 13-18 nm; length: 1-12μm | 383.3+31.7 g | -2.63+0.08 e | Cheap Tubes, Brattleboro, VT |
| nano-Ag | nano Ag | diameter: 1-70 nm35 | 19.4+2.6 g 289.6+28.9d |
-2.38+0.25 e -0.39±0.02d |
Novacentrix, Austin, TX |
| nC60 | fullerene nanoparticles | N/A | 101.9+40.4c 684.4+90.4d |
-3.36+0.06e -2.53+0.10e |
MER, Tucson, AZ |
| RGO | reduced graphene oxide | N/A | 221.8±17.7c | -1.19+0.02d | Prof. Ajayan'slab, RiceUniversity |
| SiO2 | silica, fumed | diameter: 200-300 nm | 66.3±12.7d | -0.41+0.06d | Sigma #S5505, St. Louis, MO |
| SWNT | single-walled carbon nanotubes | outer diameter: ∼1.5 nm; length: 1-5 μm | 678.6±89.8c | -2.35+0.11e | Nanolab, Waltham, MA |
| TiO2nanoparticle | titanium dioxide, P25 | diameter: < 25 nm inner diameter: | 222.1+50.7c | -0.85+0.15e | Aldrich #637254, St. Louis, MO |
| 296.7+16.9d | -0.98+0.05 | ||||
| TiO2nanotube | titanium dioxide nanotubes | ∼200 nm; wall thickness: ∼20 nm; length: 10-100 μm | 408.2±77.0c | -0.15+0.15e | Prof. Jun Lou's lab, Rice University |
| 497.6±91.5c | -1.19+0.12d | ||||
| UV irradiated nC60 | UVA-irradiated fullerene nanoparticles | N/A | 109.4+7.2c14 | -1.13+0.05e | MER, Tucson, AZ |
All measurements were performed in the same background solution in which the stock ENM suspensions were prepared as well as in the S-media used in the toxicity tests.
a
Number mean hydrodynamic diameter (nm).
b
Not available.
c
Measured in deionized water.
d
Measured in S-media filtered through 0.22 μm syringe filters.
e
Measured in deionized water at ∼pH 5. Measurements at other pHs can be found in the SI and the online database.
f
Measured in 0.01% SDS;
g
Measured in 200 mg/L tannic acid; other materials were in deionized water.