title: Enhancing the plasmonic circular dichroism by entrapping chiral molecules at the core-shell interface of rod-shaped Au@Ag nanocrystals.
abstract: We report the enhancement of plasmonic circular dichroism (PCD) in cysteine-modified Au nanorods via Ag coating. The entrapment of cysteine at the Au-Ag interface effectively amplifies the local electromagnetic field and leads to strong enhancement of the PCD response. Ag coating on spherical nanoparticles modified with cysteine does not generate obvious PCD signals.
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. wuxc@nanoctr.cn and University of the Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Hou
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. wuxc@nanoctr.cn and University of the Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Yan
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. wuxc@nanoctr.cn.
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Hu
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. wuxc@nanoctr.cn.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Wu
mesh_terms: D002384:Catalysis; D002942:Circular Dichroism; D003545:Cysteine / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold; D003545:Cysteine