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The Study of Surface Plasmon Resonance in Au-Ag-Au Three-Layered Bimetallic Nanoshell: The Effect of Separate Ag Layer

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Abstract

Localized surface plasmon resonance (LSPR) properties of Au-Ag-Au three-layered nanoshell are investigated theoretically using the quasi-static electricity. Triple-bands LSPRs have been observed in the absorption spectrum. Both the peak wavelength and intensity could be fine tuned by altering the thickness and radius of the separate Ag layer. The properties and physical origin of the LSPR in the Au-Ag-Au three-layered nanoshell is much different from that of Au-dielectric-Au three-layered nanoshell. The corresponding physical mechanism has been illustrated by plotting the local electric field patterns and analyzing the interaction of the surface charges from different metal interfaces. Although the LSPR of Au-Ag-Au three-layered nanoshell is affected by the plasmon hybridization from all metal surfaces, it has been found that the plasmon coupling in different metallic layer takes main effect on the LSPR properties of different absorption peaks. These results indicate that the different type of metallic layers appearing alternately in the multilayered nanoshells could create abundant tunable LSPR modes, which provides potential for multiplex biosensing based on LSPR.

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Acknowledgments

This work was supported by the Program for New Century Excellent Talents in University under grant no. NCET-10-0688, the Fundamental Research Funds for the Central Universities under grant no. 2011jdgz17, and the National Natural Science Foundation of China under grant no. 11174232, 61178075, and 81101122.

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  1. The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, Xian Ning West Road 28#, 710049, People’s Republic of China

    Jian Zhu, Jian-jun Li & Jun-wu Zhao

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  1. Jian Zhu
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  2. Jian-jun Li
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  3. Jun-wu Zhao
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Correspondence to Jian Zhu or Jun-wu Zhao.

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Zhu, J., Li, Jj. & Zhao, Jw. The Study of Surface Plasmon Resonance in Au-Ag-Au Three-Layered Bimetallic Nanoshell: The Effect of Separate Ag Layer. Plasmonics 9, 435–441 (2014). https://doi.org/10.1007/s11468-013-9640-9

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  • DOI: https://doi.org/10.1007/s11468-013-9640-9

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