Tunable Plasmonic Circular Dichroism of Hierarchical Chiral Assemblies.

ABSTRACT: Plasmonic circular dichroism (PCD) is a powerful approach for enhancing chiroptical effects at the nanoscale with promising applications such as optical information processing, sensing, and catalysis. However, a key challenge remains in achieving both strong and tunable optical responses. While most strategies use either intrinsically chiral nanoparticles (NPs) or achiral NPs arranged into chiral assemblies, combining both offers a promising route to amplify chiral optical responses. Here, 4-fold-twisted gold nanorods (cGNRs) were assembled by depletion-induced self-assembly (DISA) into chiral superstructures with tunable PCD properties. By reducing cGNR helicity via chemical etching, we study how building block helicity affects hierarchical structure formation. Whereas static helical supe

SUBMITTER: Trazo JG 

PROVIDER: S-EPMC12478866 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature