Carbon nanotube compositions and methods of making and using same
AssigneeUniversity of Maryland, College Park
InventorsJarrett Leeds, YuHuang Wang, John T. Fourkas
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Abstract
Carbon nanotube compositions suitable for printing, methods of making carbon nanotube compositions, and substrates having a print thereon containing carbon nanotube compositions, and uses thereof. The carbon nanotubes of the compositions are individualized. The carbon nanotube compositions can be used in applications, such as document security.
Claims17
A composition suitable for printing comprising a plurality of carbon nanotubes in an aqueous medium, said medium comprising a polyol and a surfactant, wherein the concentration of the nanotubes in the composition is at least 3.6 μg/L and at least 20% of the nanotubes are individually dispersed.
A method for detecting the presence of a plurality of single-walled carbon nanotubes deposited on a substrate from a composition comprising a plurality of the single-walled carbon nanotubes in a aqueous medium, said medium comprising a polyol and a surfactant, wherein the concentration of the nanotubes in the composition is at least 3.6 μg/L and at least 20% of the nanotubes are individually dispersed comprising the steps of:
- a) obtaining a near-infrared spectrum of a sample ink;
- b) determining if the sample ink has one or more preselected peaks in the near-infrared spectrum;
- and
- c) identifying the ink as the single-walled carbon nanotube composition if the sample has one or more preselected peaks in the near-infrared spectrum.
Dependencies are inferred from the claim text.