2026-10-14T08:56:25Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34030933 2026-09-30T09:04:19Z category_4 category_146 category_915 category_7 category_13 category_15 category_19 category_21 category_24 category_873 portal_63 item_type_6 month_year_09_2026

Chiral Gold Nanocups with Large Magnetic Plasmonic Enhancement for Single-Particle Chiroptical Response Lingling Zhang (116711) Hao Wu (65943) Teun A.P.M. Huijben (19856228) Xinyue Xia (8781887) Yilin Chen (678552) Jianfang Wang (1561363) Biochemistry Space Science Physical Sciences not elsewhere classified Medicine Genetics Neuroscience Pharmacology Biotechnology Evolutionary Biology Chemical Sciences not elsewhere classified silica substrates exhibit offers promising perspectives numerical simulations indicate measured dissymmetry factors may contribute partially individual nanocups supported desired chiroptical properties asymmetric hollow architecture chiral gold nanocups chiral glutathione molecules strong chiroptical responses scattering dissymmetry factors fold enhancement compared extinction dissymmetry factor achiral nanocup controls chiral au nanocups chiral extinction strong enhancements scattering measurements enhancement arises wide applications synergistic coupling side opening rotation measurements residual linear polarization artifacts plasmonic nanoparticles pbs nano particle level magnetic fields initiated overgrowth Chiral plasmonic nanoparticles have recently attracted much attention owing to their strong chiroptical responses and wide applications. However, most chiral plasmonic nanoparticles exhibit electric plasmon resonance modes but lack magnetic plasmon resonance modes, the latter of which are crucial for achieving strong chiroptical responses. Herein we report on a type of chiral Au nanocup structure featuring an asymmetric hollow architecture with a side opening. The chiral Au nanocups are synthesized by the vertex-initiated overgrowth of Au on PbS nano-octahedra, which is templated by chiral glutathione molecules. The chiral extinction and scattering measurements are conducted at the ensemble and single-particle level, respectively. The scattering dissymmetry factors of individual nanocups supported on silica substrates exhibit a 50-fold enhancement compared to the extinction dissymmetry factor of the ensemble in solution. Numerical simulations indicate that this enhancement arises from strong enhancements of electric and magnetic fields, as well as synergistic coupling between the nanocup and the substrate. Experimentally, residual linear-polarization artifacts were identified through achiral nanocup controls and rotation measurements. They may contribute partially to the measured dissymmetry factors. Our study enriches chiral plasmonic nanoparticles and offers promising perspectives for the design of plasmonic nanoparticles with desired chiroptical properties. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acsnano.6c09477.s001 https://figshare.com/articles/journal_contribution/Chiral_Gold_Nanocups_with_Large_Magnetic_Plasmonic_Enhancement_for_Single-Particle_Chiroptical_Response/34030933 CC BY-NC 4.0