PlasmaTubes Single-Wall Carbon Nanotubes – SWCNT

RN-020 Raw SWCNT, RN-220 Purified SWCNT and SPT-220 SuperPurified SWCNT

PlasmaTubes Single-Wall Carbon Nanotubes – SWCNT
 

Using a patented plasma torch process, Raymor Nanotech produces raw single-wall carbon nanotubes (SWCNT) at high rates, enabling the lowest prices on the market. As shown by the detailed analysis below, the plasma-grown SWCNT display a high graphitization level, diameters (0.9-1.5 nm) and lengths (0.3-4 μm) close to those of laser- and arc-grown SWCNT. The purity of the raw SWCNT (RN-020) is comparable to the purity of the best arc-discharge SWCNT on the market. The following pages will display the information gathered by thermogravimetric analysis, Raman spectroscopy and optical absorption on the raw (RN-020), purified (RN-220) and SuperPurified (SPT-220) SWCNT. The Super Purified SWCNT (SPT-220) product has a nanotube purity of 95-99%. This material is provided in an aqueous surfactant solution with a nanotube concentration of 0.50 mg CNT/mL and a surfactant-removed thick film.

A brief summary of the measurement protocols as well as a table showing our typical parameters will complete this technical data sheet. Please visit www.raymor.com for more details on our prices and our technology. For our semiconducting SWCNT, please visit the product section of our site or www.nanointegris.com. You may of course also contact us directly.

Prix

Additional discounts also available for large volume orders.

For more information contact us or call +1-450-434-6266.

Semi-purified SWCNT (RN-220) Order SizeSWCNT ContentPrice per g

Raw SWCNT (RN-020) Order Size SWCNT Content Price per g
>1 kg 30% 10 USD/g
100-999 g 30% 15 USD/g
<100g 30% 20 USD/g
>500 g 60-70% 45 USD/g
100-499 g 60-70% 65 USD/g
<100g 60-70% 85 USD/g
SuperPurified SWCNT (SPT-220) Order Size SWCNT Content Price per g
>5 g >95% 800 USD/g
1-5 g >95% 995 USD/g
>95%1500 USD/g


Plasma SWNT Product



1. RN-020 Raw SWCNT

RN-020 Raw SWCNT

Typical parameter ranges for RN-020 raw SWCNT

Parameter Measurement Typical range
G/D ratio with BWF subtraction Raman spectroscopy at 514 nm 57
G/D ratio without BWF subtraction Raman spectroscopy at 514 nm 50
Ash content Thermogravimetric analysis 27%
1st oxidation peak Thermogravimetric analysis 400 ºC
2nd oxidation peak Thermogravimetric analysis 690 ºC
Itkis index Optical absorption 0.06-0.08
2. RN-220 Purified SWCNT

RN-220 Purified SWCNT

Typical parameter ranges for RN-220 purified SWCNT

Parameter Measurement Typical range
G/D ratio with BWF subtraction Raman spectroscopy at 514 nm 91
G/D ratio without BWF subtraction Raman spectroscopy at 514 nm 80
Ash content Thermogravimetric analysis 21%
1st oxidation peak Thermogravimetric analysis 580 ºC
2nd oxidation peak Thermogravimetric analysis 650 ºC
Itkis index Optical absorption 0.08-0.1
3. SPT-220 SuperPurified SWCNT

SPT-220 SuperPurified SWCNT

Typical parameter ranges for SPT-220 SuperPurified SWCNT

Parameter Measurement Typical range
G/D ratio with BWF subtraction Raman spectroscopy at 514 nm >40
G/D ratio without BWF subtraction Raman spectroscopy at 514 nm >35
Ash content Thermogravimetric analysis 1-3%
1st oxidation peak Thermogravimetric analysis 580 ºC
2nd oxidation peak Thermogravimetric analysis 650 ºC
Itkis index Optical absorption >0.2
Safety Data Sheet

Please download the safety data sheet (SDS) by clicking on the link below.

MSDS SWNT RN-020
4. Methodology for thermogravimetric Analysis (TGA)

For a typical TGA analysis, we place a 3-10 mg SWCNT sample into the properly calibrated TGA apparatus (Shimadzu). Using a slope of 10 ºC/min, the temperature is raised from 0 to 900 ºC in flowing air (18 ccm).

The ash content is the lowest value of the weight curve that we read off where the curve is flat (between 800-900 ºC). In order to determine the oxidation peaks, the TGA curve is smoothed with 150 data points. The derivative of the TGA is calculated with the TGA software and the oxidation peaks are the 2 minima of this derivative curve.

5. Methodology for Raman spectroscopy

For Raman spectroscopy, the samples are prepared as follows: a 2 mg samples is homogenized in 1 ml of acetone using sonication during 1 min. The mixture is deposited onto a glass slide and the acetone dries. The samples are measured using Raman spectroscopy (Renishaw) at λ=514 nm with a calibrated laser power (typically 3.5 mW before optical lense). The laser beam diameter at the focal point is 120 μm. The acquisition time is 30 s for the 150-3000 cm-1 spectral range.

Before we calculate the G/D ratio, the constant baseline is subtracted from the Raman spectra. To calculate the G/D more accurately, the Breit-Wigner-Fano profile, a contribution from the G band, is subtracted to obtain the height of the D band. This procedure leads to lower D band heights and higher G/D ratios. However, subtracting the Breit-Wigner-Fano (BWF) profile leads to some uncertainty because it is difficult to model this profile accurately.

6. Methodology for Optical Absorption

For optical absorption measurements,

To calculate the Itkis index, the π-plasmon and metallic SWCNT contribution to the background (below the S22 band) are modeled as a straight line (between 1-3 eV). Once this background is subtracted, we integrate the area of the S22 band between 1.1 and 1.55 eV. The band area is divided by the total absorption (including the background) between 1.1 and 1.55 eV to yield the Itkis index.

PlasmaTubes Technical Data Sheet We currently offer our nanotube products in two forms: The fluffy, as-produced powder from our Plasma-torch reactors or an aqueous surfactant solution at 1.0 mg CNT's /mL. We disperse the powder product into surfactant in a proprietary process that involves homogenizing sonication. The end result is a stable, concentrated solution that can be utilized for various customer applications.