等离子体子
拉曼散射
材料科学
罗丹明6G
吸收(声学)
拉曼光谱
表面等离子体子
光电子学
罗丹明
光学
分子
化学
物理
荧光
复合材料
有机化学
作者
Ziyun Wang,Xuanli Zheng,Mengyao Gao,Jingtian Zhao,Jinshen Lan,Xiaofang Ye,Jing Wan,Yuchen Fei,Shengshi Guo,Yuanfei Wu,Shengli Huang,Shu-Ping Li,Junyong Kang
标识
DOI:10.1016/j.jpcs.2021.110414
摘要
Plasmonic properties of the Ag nanocaps were analyzed by the finite-difference time-domain method, in addition to the fabrication and sensor application of the two-dimensional Ag nanocap arrays. The thickness limitation for the light penetration of the nanocaps was revealed. The evolution of the plasma modes with the shell thickness and structure of the nanocaps was illustrated. The hemisphere nanocap was found to own the strongest absorption intensity and field enhancement. The sensing ability of the fabricated Ag hemisphere nanocap arrays was evaluated by the Raman spectrum of the rhodamine 6G and methylene blue molecules. The ordered arrays displayed improved light absorption with intense plasmon coupling, resulting in the strong surface-enhanced Raman scattering with an enhanced factor 15 folds of the nanosphere arrays, which suggested that the metal nanocaps might be promising for biochemical sensor application.
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