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Table 1 Physicochemical characteristics of the MWCNT library

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

MWCNT
sample
ICP-MSa
residues
(%)
Raman spectroscopy EDXb XPSc Kaiser test BETd Pore volume
Al TEe ID1/IG ACf C (%) O(%) N(%) C(%) O(%) N(%) (μmol/g) (m2/g) (μl/g)
NC7000 4.43 0.54 1.29 4.68 92.05 3.19 0 97.8 1.4 0 24 61
TP7000 0.04 0.16 0.47 0.48 98.89 1.06 0 99.4 0.6 0 30 83
TP-COOH 0.41 0.81 98.59 1.22 0 95.1 4.4 0.5 141 381
TP-NH2 0.39 1.92 90.97 5.99 3.02 86.3 7.3 6.4 47 182 402
CP7000 0.13 0.15 1.28 4.07 98.88 0.98 0 98.1 1.9 0 30 111
CP-COOH 1.16 5.00 95.47 4.33 0 94.1 5.9 0 179 521
CP-NH2 1.28 4.53 97.62 1.17 0.78 98.6 0.7 0.5 62 111 330
  1. aTE, transition elements (Co and Fe)
  2. bEDX, energy dispersive X-ray analysis
  3. cXPS, X-ray photoelectron spectroscopy
  4. dBET, Brunauer, Emmett and Teller analysis
  5. eTE, transition elements (Co and Fe)
  6. fAC amorphous carbon content estimated from the area of the D3 band expressed as area percent from the total deconvoluted Raman spectra (see Additional File 3)