| 초록 |
We report the morphology transition of selenious acid (SELA) doped polyaniline (PANI) from "nanospheres to nanorods" by just changing the synthesis condition without need of any templates. The transition of nanospheres to nanorods occurred when the acid/monomer mole ratio was between 1 and 0.5. The formation of well ordered polyaniline nanorods was dominant when the acid/monomer mole ratio was 0.5. At mole ratio 0.5, nanorods (100-150 nm in diameter) were obtained with 70% yield and conductivity about 10-3 S/cm. At mole ratio 1, both the nanorods and nanospheres were formed and formation of nanosphere was favored when the acid/monomer mole ratio was more than 1. When the acid/monomer mole ratio was low (0.125-0.03), polyaniline showed flakes like morphology. The morphology transition was studied by scanning electron microscopy and molecular structure of nanostructrues was confirmed by X-ray diffraction, FT-IR and UV-Vis spectroscopy. |
