Quantitative characterization of metallic and semiconductor single-walled carbon nanotube ratios


Ontology type: sgo:Patent     


Patent Info

DATE

N/A

AUTHORS

Avetik R. Harutyunyan , Oleg Kuznetsov

ABSTRACT

Methods and processes for quantitatively determining the ratio of the metallic to semiconductor tubes in the sample single-wall carbon nanotubes is provided. The single-walled carbon nanotubes can be sonicated to debundle the bulk material. The debundled SWNTs can be coated with a polymer, such as sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SDPS), and the coated SWNTs can be deposited on a substrate. The total number of tubes can be determined by atomic force microscopy (AFM). The semiconducting nanotubes can be determined by photoluminescence spectroscopy. The combination of photoluminescence and AFM measurements provides a quantitative ratio of the metallic to semiconductor tubes in the sample. More... »

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