title: Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species.
abstract: Electronic and biological applications of carbon nanotubes can be highly dependent on the species (chirality) of nanotube, purity, and concentration. Existing bulk methods, such as absorbance spectroscopy, can quantify sp2carbon based on spectral bands, but nanotube length distribution, defects, and carbonaceous impurities can complicate quantification of individual particles. We present a general method to relate the optical density of a photoluminescent nanotube sample to the number of individual nanotubes. By acquiring 3-dimensional images of nanotubes embedded in a gel matrix with a reducing environment, we quantified all emissive nanotubes in a volume. Via spectral imaging, we assessed structural impurities and precisely determined molar concentrations of the (8,6) and (9,4) nanotube species. We developed an approach to obtain the molarity of any structurally enriched semiconducting single-walled carbon nanotube preparation on a per-nanotube basis.
authors.affiliation: Memorial Sloan Kettering Cancer Center , New York, New York 10065, United States.|Weill Cornell Medical College , New York, New York 10065, United States.
authors.forename: Thomas V
authors.identifier: 0000-0001-8804-8524
authors.initials: TV
authors.lastname: Galassi
authors.affiliation: Memorial Sloan Kettering Cancer Center , New York, New York 10065, United States.
authors.forename: Prakrit V
authors.initials: PV
authors.lastname: Jena
authors.affiliation: Department of Chemical Engineering, University of Rhode Island , Kingston, Rhode Island 02881, United States.
authors.forename: Daniel
authors.initials: D
authors.lastname: Roxbury
authors.affiliation: Memorial Sloan Kettering Cancer Center , New York, New York 10065, United States.|Weill Cornell Medical College , New York, New York 10065, United States.
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Heller
mesh_terms: D004277:DNA, Single-Stranded / Q000032:analysis; D005782:Gels / Q000737:chemistry; D061925:Immobilized Nucleic Acids / Q000032:analysis; D008856:Microscopy, Fluorescence / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000032:analysis* / Q000648:ultrastructure; D061848:Optical Imaging / Q000379:methods*; D010084:Oxidation-Reduction; D012666:Semiconductors; D012685:Sepharose / Q000737:chemistry; D019265:Spectroscopy, Near-Infrared / Q000379:methods
chemical_list: D004277:DNA, Single-Stranded; D005782:Gels; D061925:Immobilized Nucleic Acids; D037742:Nanotubes, Carbon; D012685:Sepharose