Semiconducting Enriched Single Wall Carbon Nanotubes (SWCNT) – SG65i from SWeNT

By AZoNano

Table of Contents

Introduction
Distinguishing Properties
Typical Properties
Typical Spectra
About Southwest Nanotechnologies

Introduction

SG65i SWCNT is fabricated using the patented CoMoCAT® process, and developed for applications that require a high-purity single wall product with an increased percentage of semiconducting type nanotubes.

Distinguishing Properties

This material is a product of the company’s continuous improvement program and replaces our old SG65. This program has resulted in a product with the following:

  • High Carbon Content- Low Catalyst Residue
  • High Relative Purity
  • ≥ 95% tubes semiconducting type
  • Very Low Defects

Typical Properties

The properties of SG65i are shown in the table below:

Table 1. Properties of SG65i SWCNTs

Parameter Value Method
Appearance and Form Freeze Dried Black powder  
Bulk Density (Tapped) 0.094 g cm-3  
Moisture Content <5% By weight (TGA)
Carbon Content1 > 95% TGA
Residual Mass2 ≤ 5% TGA
Relative Purity3 > 95% TGA
Semiconducting Tube Content ≥ 95 OA
(6,5) Content >40 NIRF
Average Diameter (nm) 0.78 NIRF
Raman Quality parameter (Q)4 ≥ 0.97 Raman
Median Tube Length (^m) 1.5 AFM
Specific Surface Area (m2/g) 790 BET

Notes

1 Carbon Content is determined as the Total Weight - the Residual Mass from TGA (uncorrected for oxidation of the metals) - Moisture Content
2 Uncorrected for oxidation of metals
3 Relative Purity is the percentage of carbon that is in the form of SWCNT.
4 The Raman Quality parameter is defined as:

Where:

D = maximum height of D band
G = maximum height of G band
B = minimum value between D and G

Figure 1. Raman Spectrum of CG65i SWCNTs

Typical Spectra

All batches of SG65i are featured by near-infrared fluorescence spectroscopy and optical absorption for product consistency, by Raman Spectroscopy and Thermogravimetric Analysis for purity and compositional information

Figure 2. A Spectrum for SG65i.

Figure 3. Distribution of n,m species for SG65i

About Southwest Nanotechnologies

SouthWest NanoTechnologies Inc. (SWeNT) produces carbon nanotubes using the patented CoMoCAT® catalytic method in fluidized bed reactors. This results in selective synthesis of single-wall carbon nanotubes and remarkable control of diameter, chirality and purity.

Single-wall carbon nanotubes exhibit unique properties due to their unusual structure. They consist of a hollow cylinder of carbon ~ 1nm in diameter, up to 1,000 times as long as it is wide. This structure has remarkable optical and electronic properties, tremendous strength and flexibility, and high thermal and chemical stability. As a result, carbon nanotubes are expected to have dramatic impact on several industries, including displays, electronics, health care and composites.

SWeNT was founded in April 2001 to commercialize nanotube technology developed by Professor Daniel Resasco at the University of Oklahoma. The CoMoCAT® brand is widely recognized for quality and scalability.

This information has been sourced, reviewed and adapted from materials provided by SouthWest NanoTechnologies (SWeNT).

For more information on this source, please visit SouthWest NanoTechnologies (SWeNT).

Date Added: May 23, 2013 | Updated: Jun 11, 2013
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