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Prevention of Self-Quenching in Fluorescent Silica Nanoparticles by Efficient Energy Transfer

Authors

  • Dr. Damiano Genovese,

    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
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  • Dr. Sara Bonacchi,

    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
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  • Dr. Riccardo Juris,

    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
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  • Prof. Marco Montalti,

    Corresponding author
    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
    • Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)

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  • Prof. Luca Prodi,

    Corresponding author
    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
    • Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)

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  • Dr. Enrico Rampazzo,

    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
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  • Prof. Nelsi Zaccheroni

    1. Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna (Italy)
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  • This research was supported by the Eranet Plus program (“NanoSci-E+”, INOFEO project), the ERC (“MOSAIC” Starting Grant 259014), and MIUR (PRIN project).

Abstract

original image

Stars that shine bright: A high local dye concentration in doped silica-based core–shell nanoparticles causes self-quenching and spectral broadening (top images). This phenomenon jeopardizes the potential advantages of heavily doped systems. Förster resonance energy transfer (FRET) to an acceptor co-included in the silica led to ultrabright nanoparticles (bottom images) with a preselected narrow-band emission and a pseudo-Stokes shift of 129 nm.

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