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Issue 30, 2014
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Fluorescent carbon nanomaterials: “quantum dots” or nanoclusters?

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Despite many efforts, the mechanisms of light absorption and emission of small fluorescent carbon nanoparticles (C-dots) are still unresolved and are a subject of active discussion. In this work we address the question as to whether the fluorescence is a collective property of these nanoparticles or they are composed of assembled individual emitters. Selecting three types of C-dots with “violet”, “blue” and “green” emissions and performing a detailed study of fluorescence intensity, lifetime and time-resolved anisotropy as a function of excitation and emission wavelengths together with the effect of viscogen and dynamic fluorescence quencher, we demonstrate that the C-dots represent assemblies of surface-exposed fluorophores. They behave as individual emitters, display electronic anisotropy, do not exchange their excited-state energies via homo-FRET and possibly display sub-nanosecond intra-particle mobility.

Graphical abstract: Fluorescent carbon nanomaterials: “quantum dots” or nanoclusters?

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The article was received on 10 Jan 2014, accepted on 03 Jun 2014 and first published on 26 Jun 2014

Article type: Paper
DOI: 10.1039/C4CP00138A
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Citation: Phys. Chem. Chem. Phys., 2014,16, 16075-16084
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    Fluorescent carbon nanomaterials: “quantum dots” or nanoclusters?

    M. O. Dekaliuk, O. Viagin, Y. V. Malyukin and A. P. Demchenko, Phys. Chem. Chem. Phys., 2014, 16, 16075
    DOI: 10.1039/C4CP00138A

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