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A quantitative modeling of the contributions of localized surface plasmon resonance and interband transitions to absorbance of gold nanoparticles

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Abstract

A quantitative modeling of the contributions of localized surface plasmon resonance (LSPR) and interband transitions to absorbance of gold nanoparticles has been achieved based on Lorentz–Drude dispersion function and Maxwell-Garnett effective medium approximation. The contributions are well modeled with three Lorentz oscillators. Influence of the structural properties of the gold nanoparticles on the LSPR and interband transitions has been examined. In addition, the dielectric function of the gold nanoparticles has been extracted from the modeling to absorbance, and it is found to be consistent with the result yielded from the spectroscopic ellipsometric analysis.

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Acknowledgments

This study has been financially supported by National Research Foundation of Singapore (NRF-G-CRP 2007-01). Y. Liu acknowledges NSFC under project No. 60806040, and the Grant under project No. 2008ZC80.

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Authors and Affiliations

  1. School of Electrical and Electronics Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    S. Zhu & T. P. Chen

  2. Singapore Institute of Manufacturing Technology, Singapore, 638075, Singapore

    Y. C. Liu

  3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China

    Y. Liu

  4. Department of Physics, The University of Hong Kong, Hong Kong, Hong Kong

    S. Fung

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  1. S. Zhu
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  2. T. P. Chen
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  3. Y. C. Liu
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  4. Y. Liu
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  5. S. Fung
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Correspondence to T. P. Chen.

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Zhu, S., Chen, T.P., Liu, Y.C. et al. A quantitative modeling of the contributions of localized surface plasmon resonance and interband transitions to absorbance of gold nanoparticles. J Nanopart Res 14, 856 (2012). https://doi.org/10.1007/s11051-012-0856-y

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  • DOI: https://doi.org/10.1007/s11051-012-0856-y

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