| 초록 |
We prepared carbon nanospheres by pyrolysis of the core crosslinked diblock copolymer micelles. Poly(ethleneoxide)-b-poly(4-ethynylstyrene) (PEO-PES) with a hydrophobic block having curable acetylenic groups, was synthesized by atom transfer radical polymerization (ATRP). The number average molecular weight of the PES block was calculated to be 2,200 from the peak area ratio of the PEO block to the PES block and the Mn of PEO (5,000). A micelle with the size of about 28 nm was prepared by dissolving PEO-PES in water (0.05 mg/ml). A micelle core consisting of PES blocks was crosslinked core was carbonized and the PEO block of the shell eliminated, resulting in a carbon nanosphere with the diameter of about 8nm. The FT-IR spectrum showed that all of the characteristic bands for the diblock copolymers disappeared after pyrolysis Raman scattering spectrum of the carbon nanosphere exhibited typical partially graphitic carbon characteristics, with a strong and relatively narrow band at 1590 cm-1 and a broad band at 1350 cm-1, corresponding to graphitic species (G-band) and disordered spcies (D-band), respectively. |
