All Raman measurements were taken using a 514 nm laser. IsoNanotubes-S (99%), and PureTubes, respectively. Resonance Raman plots for our IsoNanotubes-M (95%). The remaining 5% mass decrease is attributable to the burno! of residual surfactant and carbonaceous impurities. NAA data indicates that our IsoNanotubes contain roughly 5% iodine by mass (see Figure 3) iodine comprises roughly half the mass of an iodixanol molecule. Of residual iodixanol adsorbed to the surface of the nanotubes. Approximately 2/3 of the ~15% mass decrease which occurs between ~200 and ~400☌ is attributable to the burno! Thermogravimetric (TGA) plots of our nanotube products. Our IsoNanotube samples, however, contain approximately 5% iodine by mass, resulting from residual iodixanol on the surface of the nanotubes that is not eliminated by our surfactant removal procedures. NAA reveals that our IsoNanotubes and PureTubes contain significantly lower levels of metallic/catalyst impurities than the raw arc discharge SWNTs from which they are produced. Neutron activation analysis (NAA) data taken from our IsoNanotube and PureTube powders. Before comparison, the individual peak areas are scaled by empirically determined values for the M11 and S22 extinction coefficients.įull elemental profiles of our products are available upon request.įigure 2. We estimate our metallic and semiconducting enrichment levels based on ratios of the M11 and S22 peak areas after linear background subtraction. We see peaks where we would expect them: S33 transitions should lie between ~450-630 nm, M11 transitions between ~600-850 nm, and S22 transitions between ~ 900-1,270 nm. 35, 1018 (2002)), we can calculate the transition energies for nanotubes in our diameter range (1.2 – 1.7 nm). Optical absorbance plots for our IsoNanotubes-M (98%). PricesĪdditional discounts also available for large volume orders.įor more information contact us or call +1-45.
Offered in an acqueous solution or a powder. Sorted using our patent density gradient ultracentrifugation (DGU) process. Metallic single-wall carbon nanotubes are a NanoIntegris exclusivity.
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