Characterization of single-wall carbon nanotubes by N2 adsorption |
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| Affiliation: | 1. United States Department of Energy, National Energy Technology Laboratory, P.O. Box 10940, Pittsburgh, PA 15236, United States;2. Leidos Research Support Team, Pittsburgh, PA 15236, United States;3. Department of Chemical and Petroleum Engineering, University of Pittsburgh, PA 15261, United States;1. Department of Civil & Environmental Engineering, University of Massachusetts Amherst, 130 Natural Resources Road, Amherst, MA 01003, USA;2. Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, SC 29208, USA;1. Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Republic of Korea;2. WCSL of Integrated Human Airway-on-a-chip, Department of Applied Organic Materials Engineering, Inha University, Incheon, 402-751, Republic of Korea;3. Department of Nano Mechanics, Nano Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon, 34103, Republic of Korea;1. Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China;2. Department of Electronic Science and Technology, Tongji University, 4800 Caoan Road, Shanghai, 201804, China |
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| Abstract: | N2 adsorption isotherms at 77 K of single-wall carbon nanotubes (SWNTs), multi-wall carbon nanotubes (MWNTs), and mixtures of these carbon nanotubes (CNTs) were analyzed for differences in their pore size distributions (PSDs). The PSDs, calculated in the microporous region by the Horvath–Kawazoe method and in the mesoporous region by the BJH method, are in agreement with the structures of both types of CNTs deduced from high-resolution transmission electron microscopy. A characteristic peak in the microporous region in the PSD of SWNTs is not present in the PSDs of MWNTs and impurities such as amorphous carbon, metal residues of catalysts, etc. The evaluation of this peak is proposed as a convenient tool for the quantitative characterization of SWNT purity in carbon nanotube-containing samples. |
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