Interlaboratory Evaluation of in Vitro Cytotoxicity and Inflammatory Responses to Engineered Nanomaterials: The NIEHS Nano GO Consortium

http://dx.doi.org/10.1289/ehp.1306561



Table 1. Physicochemical characterization of TiO2 and ZnO ENMs.
Quality Technique TiO2-P25 TiO2-A TiO2-NBs ZnO
Abbreviations: L, length; NA, not available; PdI, polydispersity index; T, thickness; W, width; XRD, X-ray defraction.
Size (nm) TEM ~ 24 ~ 28 L:7000; W:200; T:10 ~ 20
Size in H2O (intensity-based) (nm ± SD) DLS 209 ± 8 (PdI 0.065) 292 ± 70 2,897 ± 117 215 ± 15 (PdI 0.033)
Phase and structure XRD 81% anatase and 19% rutile 100% anatase 100% anatase 100% zincite
Shape/morphology TEM Spheroid Spherical Belt Spheroid
Surface area (m2/g) BET 53 173 18 26
Zeta potential in H2O at pH 6.0 (mV ± SD) Zetasizer –34.4 ± 1.6 –30.7 ± 0.8 –30.3 ± 2.8 –28.2 ± 0.5
Elemental analysis (weight percent) ICP-MS 98.6 NA NA 99.3