Fabrication of complex 3-D nanoparticle assemblies enabled a Au helical ribbon-like assembly with chiral plasmonic response several orders of magnitude higher than that of natural chiral materials.
Significance and Impact
Complex 3-D particle assembly beyond typical morphology defined by the phase diagram opens a viable path toward designer composites with access to targeted properties.
- By imposing geometric constraints in the self-assembly process of supramolecular nanocomposites, new 3-D particle assemblies can be accessed with new properties.
- Chiral plasmonic response in the near IR range is demonstrated with 4-5 orders of magnitudes higher than natural materials;
- Further studies are needed to understand the interface among nanoparticle packing and phase behavior of parent block copolymers under confinement and nanoparticle diffusion.