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Table 1 Size and zeta potential of different type of nanoparticles.

From: Optimized dispersion of nanoparticles for biological in vitro and in vivo studies

Particle Average diameter (nm) PdI Zeta Potential (mV)
TiO 2 rutile – Sigma    
DI H2O no US 502 ± 34 0.434 ± 0.086 -44.2 ± 0.3
DI H2O 160 ± 2 0.166 ± 0.015 -40.9 ± 3
PBS 641 ± 69 0.263 ± 0.022 -19.5 ± 6.3
PBS, HSA 186 ± 10 0.212 ± 0.03 -8.8 ± 0.9
PBS, Tween 578 ± 132 0.248 ± 0.017 -13.3 ± 4.4
PBS, mserum 175 ± 5 0.270 ± 0.046 -10.7 ± 1.5
Diesel – SRM 2975    
DI H2O no US 347 ± 21 0.397 ± 0.047 -45.2 ± 2.7
DI H2O 144 ± 1 0.132 ± 0.009 -48.4 ± 1.7
PBS 684 ± 284 0.249 ± 0.064 -32.0 ± 2.8
PBS, HSA 163 ± 3 0.152 ± 0.008 9.6 ± 0.6
PBS, Tween 151 ± 1 0.143 ± 0.012 -7.0 ± 0.2
PBS, mserum 168 ± 13 0.209 ± 0.033 -9.2 ± 1.4
Silver    
DI H2O no US 403 ± 125 0.455 ± 0.039 -20.1 ± 3.9
DI H2O 161 ± 12 0.338 ± 0.055 -29.8 ± 0.3
PBS 223 ± 8 0.343 ± 0.026 -24.5 ± 3.1
PBS, HSA 172 ± 22 0.343 ± 0.018 -11.3 ± 0.3
PBS, Tween 194 ± 23 0.368 ± 0.014 -9.8 ± 1.9
PBS, mserum 158 ± 5 0.305 ± 0.063 -11.0 ± 0.6
TiO 2 anatase    
DI H2O no US 1169 ± 48 0.462 ± 0.02 13.8 ± 2.1
DI H2O 517 ± 60 0.431 ± 0.055 -18.7 ± 0.4
PBS 890 ± 230 0.369 ± 0.077 -23.0 ± 1.7
PBS, HSA 521 ± 25 0.475 ± 0.023 -9.6 ± 1.1
PBS, Tween 818 ± 11 0.358 ± 0.029 -14.0 ± 2.5
PBS, mserum 574 ± 92 0.474 ± 0.111 -10.7 ± 1.1
ZnO    
DI H2O no US 1298 ± 252 0.721 ± 0.072 10.6 ± 2.0
DI H2O 278 ± 72 0.414 ± 0.086 -29.4 ± 6.0
PBS 517 ± 174 0.445 ± 0.053 -29.3 ± 2.8
PBS, HSA 267 ± 6 0.288 ± 0.059 -11.6 ± 0.6
PBS, Tween 457 ± 135 0.360 ± 0.041 -14.6 ± 7.3
PBS, mserum 190 ± 8 0.544 ± 0.103 -7.7 ± 1.1
SiOx    
DI H2O no US 1121 ± 304 0.593 ± 0.014 -33.4 ± 1.8
DI H2O 370 ± 49 0.488 ± 0.047 -21.1 ± 19.8
PBS 852 ± 267 0.617 ± 0.025 -14.5 ± 0.2
PBS, HSA 251 ± 27 0.880 ± 0.107 -10.4 ± 0.7
PBS, Tween 398 ± 51 0.532 ± 0.040 -3.7 ± 0.4
PBS, mserum 132 ± 49 0.497 ± 0.192 -11.1 ± 0.6
SWNT    
DI H2O no US 689 ± 111 0.569 ± 0.100 -7.0 ± 7.6
DI H2O 372 ± 59 0.560 ± 0.076 -23.1 ± 10.4
PBS 977 ± 46 0.526 ± 0.131 -2.6 ± 2.3
PBS, HSA 285 ± 79 0.605 ± 0.143 -10.1 ± 0.7
PBS, Tween 291 ± 89 0.531 ± 0.103 -8.5 ± 3.3
PBS, mserum 115 ± 51 0.666 ± 0.132 -7.7 ± 1.6
MWNT    
DI H2O no US 309 ± 48 0.304 ± 0.027 -2.7 ± 2.2
DI H2O 262 ± 101 0.397 ± 0.048 -22.5 ± 19.2
PBS 486 ± 173 0.424 ± 0.079 -19.6 ± 5.8
PBS, HSA 269 ± 56 0.406 ± 0.027 -9.7 ± 1.1
PBS, Tween 206 ± 13 0.292 ± 0.037 -4.8 ± 0.5
PBS, mserum 166 ± 10 0.415 ± 0.006 -7.8 ± 0.4
Plain polystyrene beads    
DI H2O no US 67 ± 0.4 0.030 ± 0.004 -57.0 ± 5.3
PBS no US 73 ± 7 0.135 ± 0.068 -24.8 ± 5.7
Carboxyl modified polystyrene beads    
DI H2O no US 60 ± 0.3 0.046 ± 0.021 -56.7 ± 0.3
PBS no US 58 ± 0.9 0.057 ± 0.018 -32.5 ± 2.5
Amine modified polystyrene beads    
DI H2O no US 68 ± 0.5 0.062 ± 0.035 59.7 ± 4.9
PBS no US 86 ± 8 0.204 ± 0.029 19.0 ± 3.4
  1. Nanoparticles were prepared in distilled water at a concentration of 0.02 mg/ml with (DI H2O) or without (DI H2O no US) sonication. For other measurements, nanoparticles were prepared in distilled water at a concentration of 0.02 mg/ml by sonication and addition of human serum albumin (PBS, HSA), Tween 80 (PBS, Tween), mouse serum (PBS, mserum) or distilled water (PBS) previous to addition of PBS. The measurements were made in triplicate. The average value and the standard deviation of the measurements are shown.