Weakening Circular Dichroism of Plasmonic Nanospirals Induced by Surface Grafting with Alkyl Ligands.
Silver nanospirals with strong chiroptical activity (characterized by circular dichroism) are grafted with achiral alkyl ligands, resulting in a weakening of the chiroptical activity. The chiroptical weakening is exacerbated with increasing bond energy of the Ag-ligand contacts, which is ascribed to the effective medium screening effect and electron withdrawal toward the alkyl ligands.
Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China.
Wai-Fung
WF
Lau
Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China.
Lin
L
Yang
Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China.
Fan
F
Bai
Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China.|Institute of Advanced Materials, Partner State Key Laboratory of Environmental and Biological Analysis, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, China.|HKBU Institute of Research and Continuing Education, 9F, the Industrialization Complex of Shenzhen Virtual University Park, No. 2 Yuexing 3rd Road, South Zone, Hi-tech Industrial Park, Nanshan District, Shenzhen, 518057, Guangdong Province, China.
Zhifeng
Z
Huang
D002942:Circular Dichroism / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008958:Models, Molecular; D013237:Stereoisomerism
alkyl ligand; chiroptical activity; circular dichroism; glancing angle deposition; plasmonic nanospirals