| 초록 |
Solid-state powders of water-dispersible graphene (GPN) were prepared by treatment of methylmorpholine N-oxide monohydrate. Re-dispersion of GPN in water by simple sonication was successfully demonstrated with a highly concentrated aqueous GPN solution (0.284 mg/mL) after centrifugation at 9000 rpm for 10 min. The spin-coated thin film from the aqueous GPN solution exhibited a single-layered structure, which was examined using scanning electron microscopy, atomic force microscopy, and scanning transmission electron microscopy (with selective area electron diffraction). A nanocomposite system with a water-soluble poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was prepared on a glass substrate. A fourfold improvement in the electrical conductivity of PEDOT:PSS without deterioration of the transmittance was achieved by adding 1 wt% GPN. |
