Chemical modification of single-wall carbon nanotube

Single-wall carbon nanotube (SWNT) was prepared by d. c. are-discharge meth od and purified by filtration method. After refluxed in HNO3, the ends of S WNT were opened and oxidized into carboxylate group, which may react with o ther reagents. For chemical modification of SWNT, the carboxyl-terminated S WNT reacted with CH3(CH2)(15)NH2 with the aid of the condensation agent DCC to obtain the derivatives of SWNT with the amido-alkyl chain which enhance d the solubility of SWNT in organic solvent. The results of micro IR prove the formation of amido group in SWNT sample (<(<nu>)over tilde>(C = O) = 1 647 cm(-1)). The FT Raman results show that SWNT sample preserve its struct ure after the condensation reaction (omega (r) = 181 cm(-1)).