Tuning the Plasmonic Response up: Hollow Cuboid Metal Nanostructures
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- 作者：Aziz Genç ; Javier Patarroyo ; Jordi Sancho-Parramon ; Raul Arenal ; Martial Duchamp ; Edgar E. Gonzalez ; Luc Henrard ; Neus G. Bastús ; Rafal E. Dunin-Borkowski ; Victor F. Puntes ; Jordi Arbiol
- 刊名：ACS Photonics
- 出版年：2016
- 出版时间：May 18, 2016
- 年：2016
- 卷：3
- 期：5
- 页码：770-779
- 全文大小：784K
- 年卷期：0
- ISSN：2330-4022
文摘
We report the fine-tuning of the localized surface plasmon resonances (LSPRs) from ultraviolet to near-infrared by nanoengineering the metal nanoparticle morphologies from solid Ag nanocubes to hollow AuAg nanoboxes and AuAg nanoframes. Spatially resolved mapping of plasmon resonances by electron energy loss spectroscopy (EELS) revealed a homogeneous distribution of highly intense plasmon resonances around the hollow nanostructures and the interaction, that is, hybridization, of inner and outer plasmon fields for the nanoframe. Experimental findings are accurately correlated with the boundary element method (BEM) simulations demonstrating that the homogeneous distribution of the plasmon resonances is the key factor for their improved plasmonic properties. As a proof of concept for these enhanced plasmonic properties, we show the effective label free sensing of bovine serum albumin (BSA) of single-walled AuAg nanoboxes in comparison with solid Au nanoparticles, demonstrating their excellent performance for future biomedical applications.