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• Figs. S1, S3, and S5 are ¹H-NMR spectra of 4-bromo-N-octadecyl-1,8-naphthalimide (II), N-octadecyl-4-piperazin-1-yl-1,8-naphthalimide (NA), and SWNT-NA, respectively. Figs. S2 and S4 are ¹³C-NMR spectra of 4-bromo-N-octadecyl-1,8-naphthalimide (II) and N-octadecyl-4-piperazin-1-yl-1,8-naphthalimide (NA), respectively. Fig. S6 is a surface pressure–surface area isotherm curve of SWNT-NA
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