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Table 1 Characteristics of the CNT

From: Early signs of multi-walled carbon nanotbues degradation in macrophages, via an intracellular pH-dependent biological mechanism; importance of length and functionalization

 

S-CNT

SF-CNT

L-CNT

LF-CNT

Diameter, mean (nm)

26

25

24

25

Length, mean ± SD (μm)

1.7 ± 0.9

1.6 ± 1.6

6.4 ± 4.3

9.2 ± 5.8

- CNT < 2 μm (%)

69

74.5

2.5

0

- CNT < 5 μm (%)

100

99.5

51

23

- CNT < 10 μm (%)

100

100

84

67

- CNT < 20 μm (%)

100

100

98

93

Iron content (TGA), mean (weight %)

4.4

1.3

4.5

1.0

Composition (XPS)

 Carbon (atomic %)

98.6

91.7

97.2

91.6

 Oxygen (atomic %)

1.4

8.1

1.8

8.3

 Sulfur (atomic %)

0

0.2

0

0.1

Endotoxin levels

ND

ND

ND

ND

Intrinsic ROS production, mean ± SD

0.92 ± 0.01

0.05 ± 0.01

0.77 ± 0.05

0.65 ± 0.05

  1. SD standard deviation, ND not detectable