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    Formation Mechanism of Carbogenic Nanoparticles with Dual Photoluminescence Emission

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    Type
    Article
    Authors
    Krysmann, Marta J.
    Kelarakis, Antonios
    Dallas, Panagiotis
    Giannelis, Emmanuel P.
    KAUST Grant Number
    KUS-C1-018-02
    Date
    2011-12-29
    Online Publication Date
    2011-12-29
    Print Publication Date
    2012-01-18
    Permanent link to this record
    http://hdl.handle.net/10754/598350
    
    Metadata
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    Abstract
    We present a systematic investigation of the formation mechanism of carbogenic nanoparticles (CNPs), otherwise referred to as C-dots, by following the pyrolysis of citric acid (CA)-ethanolamine (EA) precursor at different temperatures. Pyrolysis at 180 °C leads to a CNP molecular precursor with a strongly intense photoluminescence (PL) spectrum and high quantum yield formed by dehydration of CA-EA. At higher temperatures (230 °C) a carbogenic core starts forming and the PL is due to the presence of both molecular fluorophores and the carbogenic core. CNPs that exhibit mostly or exclusively PL arising from carbogenic cores are obtained at even higher temperatures (300 and 400 °C, respectively). Since the molecular fluorophores predominate at low pyrolysis temperatures while the carbogenic core starts forming at higher temperatures, the PL behavior of CNPs strongly depends on the conditions used for their synthesis. © 2011 American Chemical Society.
    Citation
    Krysmann MJ, Kelarakis A, Dallas P, Giannelis EP (2012) Formation Mechanism of Carbogenic Nanoparticles with Dual Photoluminescence Emission. Journal of the American Chemical Society 134: 747–750. Available: http://dx.doi.org/10.1021/ja204661r.
    Sponsors
    This publication is based on work supported in part by Award No. KUS-C1-018-02 made by King Abdullah University of Science and Technology. It is also based on work supported in part by Torrey Pines and the Energy Materials Center at Cornell, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE-SC0001086. M.J.K. and A.K. dedicate this Communication to Prof. Colin Booth (Manchester University) on the occasion of his 80th birthday.
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/ja204661r
    PubMed ID
    22201260
    ae974a485f413a2113503eed53cd6c53
    10.1021/ja204661r
    Scopus Count
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