Tuning the Plexcitonic Optical Chirality Using Discrete Structurally Chiral Plasmonic Nanoparticles

Cu2+-Dominated Chirality Transfer from Chiral Molecules to Concave Chiral Au Nanoparticles

“…Noble metal NPs exhibit remarkable geometry-dependent plasmonic chirality owing to the combination of chirality and plasmonic characteristics. − The greatly enhanced asymmetric light–matter interactions in chiral plasmonic structures have created vast opportunities for promising applications in sensing, − catalysis, , biomedicine, − and photonics. , Recent breakthroughs in seed-mediated chiral synthesis have significantly enhanced our capabilities of fine-tuning the chiroptical properties of colloidal plasmonic NPs through deliberate control over the size, shape, and composition. − By further maneuvering the seed, chiral inducers, and other key synthetic parameters in the seed-mediated chiral growth processes, chiral plasmonic NPs with distinct geometries and compositions can be generated. − While previous reports proposed that the enantioselective interaction between surfaces and chiral inducers facilitates the chirality transfer from molecules to particles during the seed-mediated chiral growth process, , how other key synthetic parameters affect the chirality transfer remains unclear. The geometric transition of the chiral NPs during seed-mediated growth is complex, entangling multiple kinetically controlled and thermodynamically driven processes that are sensitively dependent upon a variety of interplaying synthetic parameters.…”

The Mechanism of Manipulating Chirality and Chiral Sensing Based on Chiral Plexcitons in a Strong-Coupling Regime

“…Generally, chiral molecules in nature, such as proteins and DNA, have a weak chiral optical response due to the mismatch with light waves caused by their smaller sizes [ 12 ]. In recent years, with the development of nano-synthesis technology, nano-processing, and fabrication technology, more and more chiral colloidal plasmonic nanoparticles (NPs) and nanostructures have been fabricated, which possess a strong chiral optical response, and have become the most promising new platforms for investigating chiral effects [ 13 , 14 , 15 , 16 ].…”

Discrete and dimeric chiral plasmonic nanorods: intrinsic chirality and extrinsic chirality

“…Due to advances in the synthetic methodologies in wet-chemistry, discrete chiral metallic nanostructures exhibiting strong chiroptical response, stability and durability have been fabricated in world-famous labs. 39–46 While the chiral response of discrete chiral nanostructures is often attributed to the chiral surface features, the spectra measured experimentally often suffer from the ensemble average effect due to the inhomogeneous shapes of the synthesized nanoparticles and their random orientations with respect to the probe beam. Thus, it is imperative to undertake a comprehensive study on the intrinsic and extrinsic chirality of discrete chiral nanostructures and analyze how the intrinsic chirality can be preserved in the presence of ensemble average.…”