Supporting Information
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Contents: Figure S1. XPS C1s spectrum of the MWCNT. Figure S2. XPS C1s
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spectrum of the functionalized MWCNT. Figure S3. XPS N1s spectrum of the
functionalized MWCNT.
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The C 1s spectrum of the MWCNT is displayed in Figure S1. This spectrum clearly
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consists of four components. The peak at 284.9 eV is is due to the graphite-like
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carbon atoms of the tube walls.1,2 The peak at 285.8 is due to defect-containing sp2-
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hybridized carbon. The peak at 288.9 eV originates from carboxylic groups. 3 The
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peaks at 291.6 eV is assigned to sp2-hybridized carbon *←shake-up.1,2 Figure S2
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shows the C1s spectrum of MWCNT/p-chitosan. The peak at 285.0 eV is contributed
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by graphite-liked carbon. The peak at 286.7 eV is assigned to –C=O, –C–NH2, and –
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C-O-.1 The peak at 288.5 eV is due to –CO–NH–. The peak at 289.7 eV originates
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from carboxylic groups. The N1s spectrum of functionalized MWCNT is presented in
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Figure S3 .The peak at 399.7 eV is assigned to the –C–NH2 . 1 The peak at 400.7 eV is
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due to the –CO–NH–. It is obvious that the nitrogen-containing groups are from p-
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chitosan.
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Literature cited
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1. Liu Y, Yu ZL, ZhangYM, Guo DS, Liu YP. Supramolecular Architectures of -
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Cyclodextrin-Modified Chitosan and Pyrene Derivatives Mediated by Carbon
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Nanotubes and Their DNA Condensation J. Am. Chem. Soc. 2008; 130: 10431-
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10439.
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2 Holzinger M, Abraham J, Whelan P, Graupner R, Ley L, Hennrich F et al.
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Functionalization of Single-Walled Carbon Nanotubes with (R-)Oxycarbonyl
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Nitrenes. J. Am. Chem. Soc. 2003; 125: 8566-8580
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3 Urszula DW, Viera S, Ralf G, Sung HJ, Byung HK, Hyun JL. Effect of SOCl2
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Treatment on Electrical and Mechanical Properties of Single-Wall Carbon
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Nanotube Networks. J. Am. Chem. Soc. 2005; 127: 5125-5131
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