Highly controlled plasmonic emission enhancement from metal-semiconductor quantum dot complex nanostructures

Hiroyuki Naiki, Akito Masuhara, Sadahiro Masuo, Tsunenobu Onodera, Hitoshi Kasai, Hidetoshi Oikawa

    研究成果: Article査読

    47 被引用数 (Scopus)

    抄録

    We have fabricated well-defined nanostructures such as SiO 2-coated Ag nanoparticles (NPs) connected with quantum dots (QDs) (Ag/SiO2-QDs) so as to control the fluorescence enhancement induced by localized surface plasmon resonance. Namely, the distance between Ag NP and QD should be noted as a controllable model to investigate the fluorescence enhancement effect. Actually, highly monodispersed Ag NP as a core was first coated with five thicknesses of SiO2 as a shell, and then QDs were specifically adsorbed onto the surface of the amino-functionalized SiO 2-coated Ag NPs. As a result, the fluorescence intensity increased with the shell thickness as a result of excitation enhancement. On the other hand, the fluorescence intensity decreased when the shell thickness became thinner because of the induced quenching. Therefore, the distance between Ag NPs and QDs should be optimized to control and enhance the fluorescence intensity.

    本文言語English
    ページ(範囲)2455-2459
    ページ数5
    ジャーナルJournal of Physical Chemistry C
    117
    6
    DOI
    出版ステータスPublished - 2013 2 14

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • エネルギー(全般)
    • 物理化学および理論化学
    • 表面、皮膜および薄膜

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