| 초록 |
The PS-b-PAA block copolymers were used to improve the solubility of Carbon dots in organic solvent. The PS-b-PAA block copolymer which is amphiphilic and self-assembled according to the composition and external environment is combined with Carbon nano dots under the EDC/NHS. The resulting PS-b-PAA-CD complex acts as a corona part of PAA-CD under water-soluble whereas in the PS selective solvent, the PAA-CD parts acts as the core, and the fluorescence intensity decreases due to the quenching effect of the π-π interaction between adjacent carbon dots. Also, PS-b-PAA-CD showed good solubility not only in water but also organic solvents such as THF, and the quantum yield was 40%. The PMMA/PS-b-PAA-CD composite film was prepared by solution-blending with PMMA. It was confirmed that the particles were unifoumly disersed through the fractured section through SEM, and strong fluorescence under specific wavelength was observed, and the measured quantum yield was also as high as 41%. |
