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Table 2 Hydrodynamic diameter, zeta potential, and two-dimensional sizing of CNT/F agglomerates dispersed in physiologic dosing media

From: Physicochemical characterization and genotoxicity of the broad class of carbon nanotubes and nanofibers used or produced in U.S. facilities

 

MW #1

MW #2

Small Agglomerates

MW #2

Large Agglomerates

MW #3

MW #4

MW #5

MW #6

MW #7

CNF #1

CNF #2

Spherical Agglomerates

 % Spherical Agglomerated

87

0

0

83

1

4

0

0

0

0

 Spherical Agglomerate Mean Diameter

μm ± SE

1.28 ± 0.16

N/A

N/A

0.81 ± 0.10

N/A

N/A

N/A

N/A

N/A

N/A

 Spherical Agglomerate Diameter Geometric Mean

μm (GSD)

0.96 (2.01)

N/A

N/A

0.66 (1.84)

N/A

N/A

N/A

N/A

N/A

N/A

Bundled Agglomerates

 % Bundle Agglomerates/Singlets

13

N/A

N/A

17

99

96

100

100

100

100

 Bundle Agglomerate Mean Length

μm ± SE

1.90 ± 0.37

3.80 ± 0.38

49.55 ± 3.58

1.11 ± 0.25

3.77 ± 0.35

6.27 ± 0.44

9.47 ± 1.26

11.32 ± 1.08

9.30 ± 1.07

2.96 ± 0.36

 Bundle Agglomerate Geometric Mean Length

μm (GSD)

1.66 (1.71)

3.09 (1.82)

47.94 (1.31)

0.72 (2.98)

2.92 (2.05)

5.17 (1.94)

5.90 (2.57)

7.91 (2.49)

6.18 (2.49)

2.11 (2.25)

 Bundle Agglomerate Mean Diameter

μm ± SE

0.38 ± 0.12

0.03 ± 0.00

9.50 ± 2.24

0.03 ± 0.00

0.10 ± 0.01

0.13 ± 0.01

0.08 ± 0.01

0.10 ± 0.01

0.21 ± 0.01

0.12 ± 0.01

 Bundle Agglomerate Diameter Geometric Mean

μm (GSD)

0.18 (4.20)

0.03 (1.60)

6.99 (2.24)

0.03 (1.56)

0.08 (1.89)

0.11 (1.07)

0.07 (2.09)

0.09 (1.64)

0.19 (1.42)

0.11 (1.63)

Hydrodynamic

Diameter (nm)

660 ± 19

771 ± 33

608 ± 30

478 ± 24

504 ± 15

714 ± 24

652 ± 26

615 ± 19

664 ± 18

Zeta Potential (pH 7.3)

−10.4 ± 0.4

−12.1 ± 0.6

−11.1 ± 0.06

−12.0 ± 0.4

−13.5 ± 0.8

−11.8 ± 0.6

−13.2 ± 0.5

−11.1 ± 0.8

−11.3 ± 0.5