Enhanced Photostability from CdSe(S)/ZnO Core/Shell Quantum Dots and Their Use in Biolabeling
| Autor: | Ghouti Medjahdi, Philippe Arnoux, Fadi Aldeek, Raphaël Schneider, Lavinia Balan, Christian Mustin, Thibault Roques-Carmes |
|---|---|
| Přispěvatelé: | Laboratoire des Interactions Microorganismes-Minéraux-Matière Organique dans les sols (LIMOS), Université Henri Poincaré - Nancy 1 (UHP)-Centre National de la Recherche Scientifique (CNRS), Photomatériaux pour l'Optique et les Nanotechnologies (PHOTON LRC 7228), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
SOLAR-CELLS
Photoluminescence LIGHT-EMITTING-DIODES Nanoparticle Nanotechnology 02 engineering and technology [CHIM.THER]Chemical Sciences/Medicinal Chemistry 010402 general chemistry 01 natural sciences Hydrothermal circulation Fluorescence SURFACE-STATES Inorganic Chemistry NANOPARTICLES SEMICONDUCTOR NANOCRYSTALS ComputingMilieux_MISCELLANEOUS Surface states Chemistry Quantum dots SIZE SERIES CADMIUM SELENIDE NANOCRYSTALS [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences CDSE NANOCRYSTALS [CHIM.POLY]Chemical Sciences/Polymers Nanocrystal Chemical engineering Quantum dot Transmission electron microscopy PHOTOLUMINESCENCE SHELL NANOCRYSTALS 0210 nano-technology Synthesis design |
| Zdroj: | Biomaterials Biomaterials, Elsevier, 2011, 6, pp.794-801 European Journal of Inorganic Chemistry European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2011, 6, pp.794-801. ⟨10.1002/ejic.201000790⟩ HAL |
| ISSN: | 0142-9612 1434-1948 1099-0682 |
| DOI: | 10.1002/ejic.201000790⟩ |
| Popis: | International audience; We report on the preparation and on the photophysical and structural characterization of alloyed CdSe(S) nanocrystals, which are covered by a ZnO shell. CdSe(S) QDs were prepared by reaction of CdCl2 with NaHSe in the presence of 3-mercaptopropionic acid (MPA) under hydrothermal conditions. The incorporation of sulfur arises from the surface-mediated MPA hydrolysis on the growing QD surface. Water-dispersible CdSe(S) QDs were successfully capped with a ZnO shell obtained by basic hydrolysis of Zn(OAc)(2). The experimental results from transmission electron microscopy (TEM) imaging and powder X-ray diffractometry (XRD) analyses indicate that the core/shell CdSe(S)/ZnO QDs have a very small diameter (ca. 2.8 nm) and exhibit a face-centered cubic crystal structure. Our results show that core/shell CdSe(S)/ZnO QDs have a higher photostability than CdSe(S) cores. CdSe(S)/ZnO QDs have potential applications as fluorescent biological labels and were successfully used for imaging Schewanella oneidensis bacterial biofilms. |
| Databáze: | OpenAIRE |
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