IsoSol-S100® Polymer-Wrapped Nanotubes
Ultra High-Purity Semiconducting SWNTs
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The use of truly scalable and patent-pending technology developed by the National Research Council of Canada, within the Printable Electronics Program, has enabled us to disperse and extract single-walled carbon nanotubes to the highest levels of semiconducting enrichment and purity to date: IsoSol-S100. The starting materials are the purified and highly-scalable RF-plasma grown carbon nanotube supplied by Raymor Nanotech1.
Experimentally, thin film transistors have been prepared from the IsoSol-S100 material on SiO2/Si substrates7, leading to average mobilities exceeding 27cm2/(Vs) and On/Off ratios of 1.8x106. These properties allow the material to be well-suited for ink jet and aerosol jet printing. Haitian Chen from USC says: "Our research group has been able to obtain excellent electrical properties, more specifically mobility of 25 cm2V-1s-1 and current on/off ratio of 4 x 10^6 from thin film transistors (TFTs) based on Nanointegris 99.9% semiconducting carbon nanotube (CNT) solution (IsoSol-S100). It is an outstanding material for the development of CNT-based macroelectronics and flexible macroelectronics. "
UV-Vis-NIR spectrophotometric assessment of purity2 indicate that this material has semiconducting purities at or greater than 99.9% with the metrics of Itkis Ratio3 and Phi Values4 exceeding 0.5 and 0.4, respectively.
The highly graphitized starting material and low sonication intensity utilized for the extraction technique minimizes damage to the nanotubes, allowing the material to exhibit high crysallinity and longer average lengths of 1-2µm, not previously seen when utilizing DGU5 or Chromatography-based6 separation methods.
Additionally, the material is processed in organic solvent with a polymer : nanotube ratio that can be adjusted to less than a factor of four (surfactant : nanotube ratio is 1x103 in our aqueous surfactant solutions). The solutions also display stabilities of greater than six months. These properties promote great nanotube deposition and adhesion for device creation.
(Click HERE for the official Press Release announcing this product)
1.K. S. Kim, A. Moradian, J. Mostaghimi, Y. Alinejad, A. Shahverdi, B. Simard and G. Soucy, Nano Research, 2009, 2, 800.
2. M. Ouyang , J. Huang , and C.M. Lieber, Acc. Chem. Res. , 2002, 35 (12), 1018-1025.
3. J. Chen, A.M. Rao, S. Lyuksyutov, M.E. Itkis, M.A. Hamon, H. Hu, R.W. Cohn, P.C. Eklund, D.T. Colbert, R.E. Smalley, and R.C. Haddon, J. Phys. Chem. B, 2001, 105 (13), 2525–2528.
4. K.S. Mistry, B.A. Larsen, and J.L. Blackburn, ACS Nano, 2013, 7, 2231-2239.
5. M.S. Arnold, A.A. Green, J.F. Hulvat, S.I. Stupp, and M.C. Hersam, Nat. Nanotechnol., 2008, 3, 387, 394.
6. M. Zheng and E.D. Semke, J. Am. Chem. Soc., 2007, 129, 6084-6085.
7. J. Ding, Z. Li, J. Lefebvre, F. Cheng, G. Dubey, S. Zou, P. Finnie, A. Hrdina, L. Scoles, G.P. Lopinski, C. T. Kingston, B. Simard, and P.R.L. Malenfant, Nanoscale, 2014, 6, 2328-2339.
|Itkis Ratio (Ї)||>0.5|
|Phi Value (Φ)||>0.39|
|Surfactant : Nanotube Concentration||<4|
|Standard Solvent Media||Toluene|
|Shelf Life||6-9 months|
SEM and AFM
|Diameter Range||1.2 - 1.4nm|
|Mean Length||2 µm|
The Radical Breath Mode (RBM) of the spectra excited at 785nm shows that the IsoSol-S100 material has a nearly flat baseline in the metallic region from 145 to 175 cm-1, indicative of a high semiconducting purity.
|Metal Catalyst Impurity||<0.5 %|
|Amorphous Carbon Impurity||<1 %|
Image used by permission of P. Malenfant: Security and Disruptive Technologies Portfolio, National Research Council Canada.
A photoluminescence excitation (PLE) map for the IsoSol-S100 material shows well resolved (S22, S11) maxima, indicative of well separated nanotubes. UP to 19 (n,m) species contribute to the spectrum, with 8 or 9 having peak intensities higher than or close to 0.5. The (10,9) chirality peak with S11=1570nm and S22=910nm, proved to be the strongest.
Download: Technical Specifications Sheet
We currently offer this nanotube product in two forms:
1. Aromatic-based (toluene, xylenes, etc.) polymer solution at 0.01 - 0.3 mg CNTs / mL or above.
2. Solvent-free thin film with polymer wrapping (Polymer:CNT ratio is typically 4 or below).
NOTE: We remove the solvent from our solutions via a proprietary process that involves filtration and rinsing. The end result is a film-like structure, otherwise known as a bucky paper. Our thin films have been formulated so that they are easy to use, break apart, and disperse in solvents, using gentle sonication.
Gram and multi-gram price quotes available by request. Additional discounts also available for large volume orders.
For more information contact our Sales Manager at email@example.com or call +1 -866-650-0482.
|Mass (mg)||Aromatic||Solvent-Free Thick Film|