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Table 1 Physical dimensions of CNT/F dispersed in isopropanol

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

MW #3

MW #4

MW #5

MW #6

MW #7

CNF #1

CNF #2

Diameter (nm)

 Company Reported Diameter (nm)

6–9

10

10–15

5–30

N/A

70–80

150

100

150

 Geometric Mean (nm ± GSD)

13 ± 1

14 ± 2

20 ± 2

19 ± 1

63 ± 1

28 ± 2

37 ± 2

102 ± 1

103 ± 1

 Arithmetic Mean (nm ± SE)

13 ± 0

16 ± 1

26 ± 2

20 ± 1

67 ± 2

38 ± 3

54 ± 4

110 ± 3

110 ± 3

 Median

12

14

19

18

63

25

28

98

100

 Diameter Range

6–29

6–216

8–275

8–133

21–168

8–218

9–425

40–397

46–263

 Normal Distribution

Lognormal

       

Lognormal

Length (μm)

 Company Reported Length (μm)

5

N/A

0.1–10

100

N/A

N/A

N/A

50–200

50–200

 Geometric Mean (μm ± GSD)

0.67 ± 1.81

1.34 ± 2.21

1.10 ± 2.00

1.41 ± 1.97

4.39 ± 2.07

2.05 ± 2.53

2.88 ± 4.26

3.64 ± 2.36

2.16 ± 2.31

 Arithmetic Mean (μm ± SE)

0.80 ± 0.03

1.79 ± 0.10

1.28 ± 0.07

1.84 ± 0.13

5.62 ± 0.29

3.42 ± 0.37

7.64 ± 0.78

5.23 ± 0.36

3.20 ± 0.28

 Median

0.6607

1.5437

1.0148

1.2896

4.547

2.1503

2.3781

3.7273

2.0003

 Length Range

0.1–3.6

0.2–50.9

0.1–8.5

0.3–20.6

1.2–25.8

0.3–37.3

0.1–49.1

0.3–37.6

0.4–42.7

 Normal Distribution

Lognormal

Lognormal

Lognormal

  

Lognormal

 

Lognormal

Lognormal

Aspect Ratio

 Aspect Ratio (GeoMean ± GSD)

53 ± 2

96 ± 2

50 ± 2

76 ± 2

69 ± 2

73 ± 2

78 ± 3

36 ± 2

21 ± 2