Skip to main content

Table 2 Suspension characteristics of MWCNTs in dispersion mediumaused for oropharyngeal aspiration in mice

From: The pulmonary toxicity of carboxylated or aminated multi-walled carbon nanotubes in mice is determined by the prior purification method

MWCNT Size distributionb pDi Zeta potential (mV)
Z-Avg
Diameter nm
Multi-mode distribution peaks
Diameter nm (% peak area)
NC7000 399 ± 6 259 ± 36 (55%)
1652 ± 1194 (45%)
0.57 −16.8 ± 1.4
TP7000 1626 ± 265 683 ± 205 (82%)
193 ± 91 (19%)
1 − 14.6 ± 1.1
TP-COOH 932 ± 49 716 ± 337 (83%)
174 ± 39 (17%)
0.83 −15.7 ± 1.4
TP-NH2 1590 ± 114 992 ± 214 (75%)
267 ± 39 (25%)
0.97 − 18.0 ± 0.4
CP7000 1359 ± 169 719 ± 403 (60%)
200 ± 12 (40%)
1 −15.3 ± 1.4
CP-COOH 484 ± 48 637 ± 145 (57%)
153 ± 29 (43%)
0.72 − 24.0 ± 0.9
CP-NH2 1897 ± 216 918 ± 85 (100%) 0.80 −17.6 ± 1.2
Mitsui-7 985 ± 73 919 ± 227 (92%)
3292 ± 2685 (8%)
0.46 −14.8 ± 0.8
  1. aMWCNTs were diluted in dispersion medium (0.1% Pluronic solution in sterile DPBS + 3% BSA) to a concentration of 50 μg/ml prior to DLS analysis
  2. bValues are mean ± standard deviation of 4–5 independent measurements. Multimode distribution is presented as diameter of different peaks and % area occupied by that peak (relative contribution)