期刊
ACS PHOTONICS
卷 3, 期 5, 页码 770-779出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.5b00667
关键词
hollow metal nanoparticles; electron energy loss spectroscopy; AuAg; localized surface plasmon resonances; label-free sensing
类别
资金
- Generalitat de Catalunya [2014 SGR 1638, 2014-SGR-612]
- Spanish MICINN [MAT2014-51480-ERC, MAT2012-33330]
- Turkish Ministry of National Education
- European Community (EU-FP7) through the FutureNanoNeeds project
- Spanish MICINN
- European Commission
- European Union [312483]
- ICREA Funding Source: Custom
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.
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