POS5-0874
Chiral Plasmonic Supramolecular Architectures Based on Star-Like Block Copolymers for Circularly Polarized Neuromorphic Devices
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Seohyun Jung (Ewha womans university)
Co-Author(s)
Abstract
Chiral plasmonic materials have emerged as promising platforms for advanced optical information processing owing to their ability to selectively interact with circularly polarized light (CPL). In this study, we investigate the formation of chiral plasmonic supramolecular architectures through the co-assembly of star-like block copolymers (BCPs), chiral ligands, and gold nanoparticles. Star-like BCPs serve as hierarchical templates that direct the organization of plasmonic nanoparticles while enabling efficient transfer and amplification of molecular chirality.
During solvent annealing, supramolecular co-assembly among the polymer scaffold, chiral additives, and gold nanoparticles generates well-defined chiral plasmonic structures exhibiting strong circular dichroism (CD) signals in the localized surface plasmon resonance (LSPR) region. Furthermore, solvent vapor pressure is found to play a critical role in determining the assembled morphology and chiroptical response. Low vapor pressure conditions favor the formation of fiber-like architectures, whereas high vapor pressure conditions induce rod-like structures with enhanced plasmonic chirality. The resulting assemblies exhibit dissymmetry factors (g-factors) of up to 0.2, among the highest reported values for polymer-templated chiral plasmonic gold nanostructures. These findings demonstrate an effective strategy for controlling hierarchical chiral plasmonic assemblies and provide a versatile platform for future CPL-responsive photonic and optoelectronic systems.
During solvent annealing, supramolecular co-assembly among the polymer scaffold, chiral additives, and gold nanoparticles generates well-defined chiral plasmonic structures exhibiting strong circular dichroism (CD) signals in the localized surface plasmon resonance (LSPR) region. Furthermore, solvent vapor pressure is found to play a critical role in determining the assembled morphology and chiroptical response. Low vapor pressure conditions favor the formation of fiber-like architectures, whereas high vapor pressure conditions induce rod-like structures with enhanced plasmonic chirality. The resulting assemblies exhibit dissymmetry factors (g-factors) of up to 0.2, among the highest reported values for polymer-templated chiral plasmonic gold nanostructures. These findings demonstrate an effective strategy for controlling hierarchical chiral plasmonic assemblies and provide a versatile platform for future CPL-responsive photonic and optoelectronic systems.
