Cover Picture: Luminescence of Polyethylene Glycol Coated CdSeTe/ZnS and InP/ZnS Nanoparticles in the Presence of Copper Cations (ChemPhysChem 12/2011)

Authors

  • Dr. Grégory Beaune,

    1. LETI-DTBS-LFCM, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-787
    2. INAC-SPrAM-LEMOH, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-113
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  • Sudarsan Tamang,

    1. INAC-SPrAM-LEMOH, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-113
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  • Dr. Aude Bernardin,

    1. LETI-DTBS-LFCM, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-787
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  • Dr. Pascale Bayle-Guillemaud,

    1. CEA-INAC/UJF-Grenoble1 UMR-E, SP2M, LEMMA, Minatec, 17 rue des Martyrs, Grenoble Cedex, 38054 (France)
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  • Daphna Fenel,

    1. CEA, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
    2. CNRS, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
    3. Université J Fourier, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
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  • Dr. Guy Schoehn,

    1. CEA, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
    2. CNRS, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
    3. Université J Fourier, Institut de Biologie Structurale Jean-Pierre Ebel, UMR5075 Grenoble (France)
    4. Unit for Virus Host Cell Interactions, UMI 3265 (CNRS-EMBL-UJF) 6 rue Jules Horowitz BP 181 F38042 Grenoble (France)
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  • Dr. Françoise Vinet,

    1. LETI-DTBS-LFCM, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-787
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  • Dr. Peter Reiss,

    Corresponding author
    1. INAC-SPrAM-LEMOH, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-113
    • INAC-SPrAM-LEMOH, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-113
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  • Dr. Isabelle Texier

    Corresponding author
    1. LETI-DTBS-LFCM, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-787
    • LETI-DTBS-LFCM, Commissariat à l'Énergie Atomique, 17 rue des Martyrs, Grenoble Cedex, 38054 (France), Fax: (+33) 438-785-787
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Abstract

original image

Click chemistry is an appealing approach for the covalent coupling of fragile biomolecules such as oligonucleotides, peptides or protein templates to the surface of fluorescent quantum dots. However, click chemistry requires the use of copper cations as catalysts, which irreversibly quench the photoluminescence of quantum dots. On p. 2247 I. Texier et al. demonstrate by means of energy-filtered transmission electron microscopy (EFTEM) that the copper ions are incorporated into the ZnS shell of polyethyleneglycol-capped CdSeTe/ZnS core/shell quantum dots, shedding new light on the quenching mechanism. The image shows the EFTEM cadmium, copper and zinc chemical maps of 7 nm×13 nm CdSeTe/ZnS quantum dots as well as their superposition.

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