Table 1.
Characterisation of MWCNTs.
| CNT format* | Length# (TEM) |
Diameter# (TEM) |
Surface Area (BET) |
Carbon purity (EDX) |
Zeta Potential (Zetasizer Nano) |
|---|---|---|---|---|---|
| MWCNT-0.6 µm in DW | 1.1 µm (0.23 – 9.7 µm) | 30.6 nm (19.5 – 47.6 nm) | 255.24 m2/g | 87% | −19.0 mV |
| MWCNT-0.6 µm in DCCM-1 | NA | NA | NA | NA | −13.2 mV |
| MWCNT-3 µm in DW | 4.3 µm (0.5 – 24.4 µm) | 33.3 nm (22.6 – 45.8 nm) | 213.64 m2/g | 93% | −13.4 mV |
| MWCNT-3 µm in DCCM-1 | NA | NA | NA | NA | −15.7 mV |
| MWCNT-20 µm in DW | 19.3 µm (0.6 – 30.8 µm) | 27.8 nm (15.6 – 41.9 nm) | 204.8 m2/g | 95% | −18.7 mV |
| MWCNT-20 µm in DCCM-1 | NA | NA | NA | NA | −12.0 mV |
DW: Deionised water
DCCM-1: Cell culture medium
TEM: Transmission electron microscopy
BET: Brunauer, Emmett and Teller analysis
EDX: Energy-dispersive x-ray spectroscopy
NA: Not applicable
*
There was no physical difference between MWCNTs suspended in DW or DCCM-1
#
Means were calculated from lengths with count frequencies greater than 5% of the total counts
The nominal length is that is provided by the manufacturer and is that used throughout the article.