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Obtain Quadruple Intense Plasmonic Resonances from Multilayered Gold Nanoshells by Silver Coating: Application in Multiplex Sensing

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Abstract

Four intense and separate localized surface plasmon resonance (LSPR) absorption peaks have been obtained in the gold-dielectric–gold–silver multilayer nanoshells. The silver coating on the gold shell results in a new LSPR peak at about 400 nm corresponding to the \( {{\left| {\omega_{+}^{-}} \right\rangle}_{Ag }} \) mode. The intense local electric field concentrated in the silver shell at the wavelength of 400 nm indicates that this new plasmonic band is coming from the symmetric coupling between the antibonding silver shell plasmon mode and the inner sphere plasmon. Increasing the silver shell thickness also leads to the intensity increasing of the \( {{\left| {\omega_{+}^{-}} \right\rangle}_{Au }} \) mode and blue shift of \( \left| {\omega_{-}^{+}} \right\rangle \) and \( \left| {\omega_{-}^{-}} \right\rangle \) modes. Therefore, quadruple intense plasmonic resonances in the visible region could be achieved in gold-dielectric–gold–silver multilayer nanoshells by tuning the geometrical parameters. And the quadruple intense plasmonic resonances in the visible region provide well 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, the Fundamental Research Funds for the Central Universities, and the National Natural Science Foundation of China under grant no. 11174232, 61178075, and 81101122.

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Authors and Affiliations

  1. The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, xian ning west road 28#, Xi’an, 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. Obtain Quadruple Intense Plasmonic Resonances from Multilayered Gold Nanoshells by Silver Coating: Application in Multiplex Sensing. Plasmonics 8, 1493–1499 (2013). https://doi.org/10.1007/s11468-013-9563-5

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  • DOI: https://doi.org/10.1007/s11468-013-9563-5

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