Fabrication of hybridized C₆₀ core -Au shell structured nanocrystals

We report the fabrication of hybridized nanocrystals by using C ₆₀ nanocrystals as a organic core and gold nanoparticles as a metallic shell. The C₆₀ nanoparticles were prepared by reprecipitation method. The morphology of C₆₀ nanocrystals can control the various shapes by selecting the proper combination of good and poor solvents in the reprecipitation method. Moreover, by changing the concentration of C₆₀ solution can control their morphology and sizes. After preparing C₆₀ nanocrystals dispersion, HAuCl₄ water solution was added into the C₆₀ nanocrystals dispersion and UV-irradiated for reduce from Au⁺ to Au. Hybridized nanocrystals could be formed when pyridine was used as a good solvent and methanol was used as a poor solvent. We also succeeded in preparation of C₆₀ nanocrystals coated by Ag nanoparticles. Details of the preparation processes and their optical properties will be reported.