(475e) Self-Assembled Nanoarchitectures with Geometry Symmetry Breaking

The self-assembly of colloidal nanoparticles into chiral superstructures offers a scalable and chemically versatile approach to engineer light–matter interactions at the nanoscale. These architectures rely on symmetry breaking to encode spin and orbital angular momentum into emitted photons, which is crucial for next-generation photonic technologies. Achieving such control requires precise tuning of particle geometry, surface functionality, and spatially directed chiral forces to guide the formation of left- or right-handed conformations. Despite progress, a major challenge remains in transferring chirality deterministically across scales from individual nanoparticles to mesoscale assemblies particularly under thermally or optically dynamic environments. In our research, we demonstrate that nanoscale colloidal geometry can be precisely modulated using chiral ligands and supramolecular peptides, facilitating the assembly of plasmonic and semiconducting nanostructures with strong circular dichroism and tunable optical anisotropy. These emergent materials exhibit polarization-resolved behaviors in transmission, photoluminescence, and thermoradiative emission processes. This bottom-up approach establishes a foundational strategy for creating chiral nanostructures capable of supporting spin-resolved light emission, polarization-encoded sensing, and thermally modulated quantum photonic applications.