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Single-wall carbon nanotubes (SWNT) are polymers of carbon in which the carbon atoms are bonded together in cylindrical form.
These unique polymers are part of the fullerene family of carbon discovered by Dr. Richard E. Smalley and colleagues in 1985.
Representative Properties
| Individual SWNT Diameteri |
~0.8 - 1.2 nm |
| Individual SWNT Lengthii |
~100 - 1000 nm |
| Calculated Molecular Weightiii |
~1.2 x 105 - 1.8 x 106 Amu |
Color |
Black |
| Morphology |
Dry powder of nanotubes bundled in ropes |
| Maximum Densityiv |
1.6 g/cm3 |
| Bulk Densityv |
~0.1 g/cm3 |
| TGA Residue as Fevi |
|
| - Raw |
<35 wt% |
| - Pure |
<15 wt% |
| - Super Pure |
<5 wt% |
| TGA 1st Derivative Peak Temperature |
Raw ~350 - 410°C
Pure ~450 - 490°C
Super Pure ~510 - 540°C
|
| TGA Onset Temperature |
Raw ~350°C
Pure ~440°C
Super Pure ~450°C |
| Maximum Surface Areavii |
1315 m2/g |
| BET Surface Area |
~400 - 1000 m2/g |
| Buckypaper Surface Resistivity viii |
~0.2 - 2 Ω/square |
| Moisture Content |
<5 wt% |
Raman
TGA Profile
Particle Analysis
Pricing and Availability
SWNT grades are available in kg quantities for research and development. Please contact us for further information about pricing and
availability.
- i - Diameter distribution measured by CCNI from TEM micrographs. Mean diameter ~1.0 nm.
- ii - Measured by CCNI using AFM.
- iii - Calculated. Lower limit assumes a SWNT with a diameter of 0.80nm and a length of 100 nm. Length of a C-C partial double bond is 0.142 nm. (0.80 nm x π/0.245 nm)(2 carbon atoms) + 1 = 22 carbons around the circumference. For every
(0.142 + 0.283 = .425 nm) length there are 2 x 22 = 44 carbon atoms. (100 nm/0.425 nm)(44)(12.01) = 124,235 Amu. Assuming 2
significant digits = 1.2 x 105. Upper limit assumes a SWNT with a diameter of 1.2nm and a length of 1,000nm.
(1.2 nm x π /0.245nm (2 carbon atoms) + 1 = 32 carbons around the circumference. For every 0.425 nm length there are
2 x 32 = 64 carbon atoms. (1000 nm/0.425 nm)(64)(12.01) = 1,808,565 Amu. Assuming 2 significant digits = 1.8 x106.
- iv - Calculated assuming single-wall nanotubes of diameter 1.0 nm arranged in crystalline “ropes” or “bundles”
(inter-wall spacing 0.3 nm).
- v - Value provided is for standard purified SWNTs. Raw and some super pure grades lots will have lower bulk densities. Other
product forms may have higher bulk densities.
- vi - 800ºC in air. The reported figures assume that the residue is present in the product as elemental Fe, and that it is fully converted
to Fe2O3 during the TGA analysis. Hence, the TGA residual as measured is multiplied by MW Fe2/MW Fe2O3 (1/1.43) to express
the result as Fe.
- vii - Calculated using geometric arguments assuming an isolated tube. SSA for tubes in “ropes” will be less than the stated value. A.
Peigney et al., Carbon 39 (2001), 507-514.
- viii - In-house, CCNI buckypaper conductivity test (4 point probe).
- ix - The preceding particle size histogram is indicative of the typical tertiary particle size distribution found in bulk powder. It does not represent secondary particles (aggregates of individual tubes also known as ropes or bundles) nor does it represent primary particle sizes (individual carbon nanotubes).
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