Growth of metal-semiconductor core-multishell nanorods with optimized field confinement and nonlinear enhancementElectronic supplementary information (ESI) available. See DOI: 10.1039/c5nr09151a

• Main Authors: Nan, Fan, Xie, Fang-Ming, Liang, Shan, Ma, Liang, Yang, Da-Jie, Liu, Xiao-Li, Wang, Jia-Hong, Cheng, Zi-Qiang, Yu, Xue-Feng, Zhou, Li, Wang, Qu-Quan, Zeng, Jie
• Format: Journal Article
• Published: 09.06.2016
• ISSN: 2040-3364; 2040-3372
• DOI: 10.1039/c5nr09151a

This paper describes a facile method for the synthesis of Au/AuAg/Ag 2 S/PbS core-multishell nanorods with double trapping layers. The synthesis, in sequence, involved deposition of Ag shells onto the surfaces of Au nanorod seeds, formation of AuAg shells by a galvanic replacement reaction, and overgrowth of the Ag 2 S shells and PbS shells. The resulting core-multishell nanorod possesses an air gap between the Au core and the AuAg shell. Together with the Ag 2 S shell, the air gap can efficiently trap light, causing strong field confinement and nonlinear enhancement. The as-prepared Au/AuAg/Ag 2 S/PbS core-multishell nanorods display distinct localized surface plasmon resonance and nonlinear optical properties, demonstrating an effective pathway for maneuvering the optical properties of nanocavities. The synthesis of Au/AuAg/Ag 2 S/PbS core-multishell nanorods with double trapping layers, demonstrating an effective pathway for maneuvering optical properties of nanocavities.