Skip to main content

Table 3 Examples of MWCNTs with their characterization information taken from the published literature

From: Aerosol generation and characterization of multi-walled carbon nanotubes exposed to cells cultured at the air-liquid interface

MWCNTs type/manufacturer Characterization Ref.
MWNT-7 (lot #05072001 K28)/Mitsui & Co., Inc. (USA)   MWCNT [5, 4650]
  L (SEM, μm) 3.86
  D (SEM, nm) 49 ± 13.4
  Trace metal contamination [sodium (0.41 %) and iron (0.32 %)] (Also reported 1.32 % for total and 1.06 % for iron content) 0.78
  SSA (BET, m2/g) 26
  Zeta potential (mV) -11
  Number of walls 20–50
Baytubes/Bayer Material Science, (Germany; no longer commercially available)   MWCNT [1, 50]
  Cobalt content (%, wt/wt) (ICP-OES) 0.46
  Content of cobalt (Co) (%, wt/wt) (AAS) 0.53
  Elemental analysis (% carbon-oxygen) 98.6–1.4
  SSA (BET, m2/g) 253
  Bulk density (g/cm3) 0.16
NM400 and NM402/JRC   NM400 [45, 51, 52]
L (SEM, μm) 0.7–3
D (SEM, nm) 5–35
Impurities total, % Al, % Co 5.38 total, 0.24, 0.58
(Also reported 13 % for total impurities)
Defects 1.2
SSA (BET, m2/g) 245.8
NM401/JRC   CNTLarge [45, 52]
L (SEM, TEM, μm) 4.05 ± 2.4
D (SEM, TEM, nm) 67 ± 26.2
Impurity (%) 3
SSA (BET, m2/g) 14.6
NM402/JRC   NM402 [45, 51]
L (SEM, μm) 0.7–4
D (SEM, nm) 6–20
Impurities total, % Al, % Co 3.16,
(Also reported 13 % for total impurities) 3.00 x 10-4, 2.39
Defects 1.12
MWCNTs/Helix Materials Solutions, Inc. (Richardson, TX)   MWCNT [5355]
  L (TEM, μm) 0.3–50
  D (TEM, nm) 10–30
  Purity (TGA, %) >94
  Metal content % Ni, %La (ICP-AES) 0.34 and 0.03 by weight
  Metal %Ni (EDX) 0.12
  SSA (BET, m2/g) 109
  Zeta potential (mV) -13 ± 2
  1. Characterization parameters such as length (L), diameter (D), specific surface area (SSA), density, trace metal content, and zeta potential are given for different MWCNTs in addition to the techniques (where available) used for measuring each of the parameters. The techniques used include Brunauer, Emmett and Teller (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroscopy (ICP-AES), thermogravimetric analysis (TGA), atomic absorption spectroscopy (AAS), and energy-dispersive X-ray spectroscopy (EDX)