| 초록 |
Over the past decade, DNA origami-enabled self-assembly of gold nanospheres (Au NSs) into the prescribed geometries has led paradigm shifting in the field of nanophotonics. However, as relatively small (~ 20 nm) and randomly faceted Au NSs have been used thus far, optical functionality of assembled Au supracolloids have been compromised. In this work, we demonstrate deterministic strategy of assembling large (60 ~ 100 nm), highly uniform, and roundest Au NSs into supracolloidal metamolecules using DNA origami as a pegboard. By benefitting from the programmability of DNA origami, the complicated structures ranging from supracolloidal clusters to oligomeric chains were achieved with unmatched structural integrity. As expected, the assemblies exhibited strong electric and unnatural magnetics resonances matching well with theoretical predictions. Taken together, our work convincingly demonstrates a versatile strategy for deterministic engineering of self-assembled plasmonic metamolecules. |
