Surface Plasmon-Enhanced Luminescence of Silicon Quantum Dots in Gold Nanoparticle Composites

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• 作者：Asuka Inoue ; Minoru Fujii ; Hiroshi Sugimoto ; Kenji Imakita
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：November 5, 2015
• 年：2015
• 卷：119
• 期：44
• 页码：25108-25113
• 全文大小：354K
• ISSN：1932-7455

文摘

A composite nanoparticle (NP) consisting of a gold nanoparticle (Au-NP) core and a thick shell of silicon quantum dot (Si-QD) agglomerates was developed. In the composite NPs with an optimized amount of Si-QDs per a Au-NP, photoluminescence from Si-QDs was enhanced, when it was excited in the wavelength range of the localized surface plasmon resonances (LSPRs) of Au-NPs. The experimental results could be well-explained by a simple model consisting of a spherical Au-NP and a spherical shell made from Si-QD aggregates. It was found that the enhancement is due to increased excitation efficiency of Si-QDs via the LSPR of Au-NPs.