| 초록 |
We introduce a unique and robust method to fabricate three dimensional plasmonic nanostructures with reduced symmetry such as a leaf-like and a dandelion-like structures attracted considerable current interest in biophotonic imaging and sensing. However, their practical applications have been still limited since the colloidal synthesis of such structures that allows, in principle, for in vivo application and large-scale production has not been explored yet. Here we demonstrate an innovative way of breaking symmetry of colloidal plasmonic nanoparticles. Our strategy exploits the overgrowth or exchange of Ag on/with various copper particles with microwave irradiation. Surface-enhanced Raman scattering signal is obtained directly from the symmetry-broken nanoparticles as an example showing the viability of the present approach. |
