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Wrapping of Single‐Walled Carbon Nanotubes with A‐B‐A Block Telomers
Author(s) -
Kitano Hiromi,
Tachimoto Kazutaka,
NakajiHirabayashi Tadashi,
Shinohara Hiroaki
Publication year - 2004
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200400134
Subject(s) - carbon nanotube , polymer chemistry , block (permutation group theory) , styrene , chemical engineering , materials science , chemistry , polymer , precipitation , copolymer , nanotechnology , organic chemistry , geometry , mathematics , physics , meteorology , engineering
Summary: Single‐walled carbon nanotubes (SWNTs) mechanically dispersed in HEPES buffer were incubated with a dispersion of A‐B‐A block telomers, composed of 2‐methacryloyloxyethyl‐ D ‐glucopyranoside telomers (A block) and a styrene telomer (B block), which had been prepared by the macroinitiator technique. After the incubation, the polymer‐wrapped SWNT could be stably dispersed in the buffer without any precipitation for several months. The glucose residue above the SWNT was definitely recognized by lectin (Concanavalin A) as proven by the increase in turbidity. Using a similar procedure, a block telomer composed of N ‐isopropylacrylamide telomers (A block) and a styrene telomer (B block) could easily be deposited onto the SWNT. A temperature‐responsive aggregation and the subsequent precipitation of the modified SWNT could clearly be observed. The usage of the block‐telomer examined here would be promising for the preparation of stable dispersions of SWNTs with various functions.