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Tunable Plasmon Resonance and Fluorescence of Au/ZnS/CdS Core/Shell Nanorods

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Abstract

Au/ZnS/CdS core/shell nanorods were synthesized via layer-by-layer over-growing sulfide semiconductors ZnS and CdS onto Au-core nanorods, and the thickness of ZnS and CdS layers was tuned by adjusting the amounts of the added metal (Zn/Cd) salts. Owing to efficient interaction between the metal and semiconductor components in the multi-core/shell nanorods, we observed redshift of the surface plasmon resonance (SPR) band, enhancement of the SPR intensity, and generation of a new SPR band. Furthermore, the spectral redshift and enhancement were also observed in the excitonic fluorescence of the Au/ZnS/CdS core/shell nanorods, which is caused by the interaction between activated excitons in the CdS shell and the transverse SPR of the Au nanorod and can be tuned by adjusting the thickness of the middle shell (ZnS). These observations have prospective applications in active plasmonic nanodevices.

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Acknowledgments

The authors thank the Natural Science Foundation of China (10534030, 10904119) and the National Program on Key Science Research (2006CB921500) for support.

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Authors and Affiliations

  1. Department of Physics, Wuhan University, Wuhan, 430072, People’s Republic of China

    Y-L Wang, S Liang, M Li, J-H Wang, X-N Peng, Z-J Yang, L Zhou, X-F Yu & Q-Q Wang

  2. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, People’s Republic of China

    M Li

  3. Physics and Electronic Technology, Hubei University, Wuhan, 430062, People’s Republic of China

    X-N Peng

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  1. Y-L Wang
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  2. S Liang
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  3. M Li
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  6. Z-J Yang
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  7. L Zhou
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  9. Q-Q Wang
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Correspondence to X-F Yu or Q-Q Wang.

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Wang, YL., Liang, S., Li, M. et al. Tunable Plasmon Resonance and Fluorescence of Au/ZnS/CdS Core/Shell Nanorods. Plasmonics 10, 919–923 (2015). https://doi.org/10.1007/s11468-015-9880-y

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  • DOI: https://doi.org/10.1007/s11468-015-9880-y

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