| 초록 |
Recently, syntheses of unique Au microcrystals using nonionic Brij surfactants, which are used as reducing, capping, and structure directing agents, have been reported by our research group. Herein, we report a novel and simple solution-based seed-mediated method using the nonionic Brij35 surfactant to synthesize Au nanotoroids with ring-like structures and vacancies at their center. The relative amount of 2nm Au seed nanoparticles significantly affected the formation yield of Au nanotoroids and the morphologies of the resulting Au nanostructures. Using the Au seed nanoparticles solution in the optimal range of 50 ~ 200 μL led to the formation of Au nanotoroids in high yield. Mechanistically, the Au nanotoroids may have originated from the Brij35-assisted etching of the initially grown platelike intermediate Au nanoparticles, which in turn could have been generated from the inner holes as defects and the edges of the Au plates. |
