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- W2138111408 abstract "This paper describes a simple experimental procedure and a practical data analysis method for characterizing the concentration of carbonaceous impurities in the as-produced single-walled carbon nanotubes (SWNTs). This procedure starts with dispersing solid as-produced SWNT soot in an aqueous surfactant solution, namely sodium dodecyl sulfate (SDS), by using a sonicator. Then the optical absorption spectrum of this SWNT/SDS suspension is measured in the visible and the near-infrared regions (12500 cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> -25000 cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> ) at a spectral resolution of 1 nm by using a spectrophotometer. The obtained spectrum features a pronounced superposition of multiple sharp peaks originating from the inter-band transitions in the electronic density of states (DOS) of the SWNTs and a broad baseline originating from the π-plasmon activities in both SWNTs and carbonaceous impurities. A practical method is proposed for use to analyze the obtained spectral data, and a numerical indicator, CIL (Carbonaceous Impurity Level), is defined as a figure of merit for comparing different as-produced SWNT samples. The validity of CIL is supported by the experimental results." @default.
- W2138111408 created "2016-06-24" @default.
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- W2138111408 date "2006-01-01" @default.
- W2138111408 modified "2023-10-16" @default.
- W2138111408 title "Characterization of Carbonaceous Impurity Level in As-Produced Single-Walled Carbon Nanotubes by Using Solution-Phase Spectrophotometry" @default.
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- W2138111408 doi "https://doi.org/10.1109/nano.2006.247734" @default.
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