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Selective Electrophoretic Deposition of CdSe Nanoplatelets

Lhuillier , Emmanuel ; Hease , Patrick ; Ithurria , Sandrine ; Dubertret , Benoit ; Laboratoire de Physique et d'Etude des Matériaux ( LPEM ) ; Université Pierre et Marie Curie - Paris 6 ( UPMC ) -ESPCI ParisTech-Centre National de la Recherche Scientifique ( CNRS )

ISSN: 0897-4756

HAL CCSD;American Chemical Society, 2014

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  • Titre:
    Selective Electrophoretic Deposition of CdSe Nanoplatelets
  • Auteur: Lhuillier , Emmanuel;
    Hease , Patrick;
    Ithurria , Sandrine;
    Dubertret , Benoit
  • Autre(s) auteur(s): Laboratoire de Physique et d'Etude des Matériaux ( LPEM ) ; Université Pierre et Marie Curie - Paris 6 ( UPMC ) -ESPCI ParisTech-Centre National de la Recherche Scientifique ( CNRS )
  • Sujets: [ CHIM.MATE ] Chemical Sciences/Material chemistry
  • Fait partie de: ISSN: 0897-4756
  • Description: International audience
    In the fields of nanoparticle synthesis and application, the control of the particle size, shape and composition is crucial. The tuning of these different parameters can be performed during the synthesis, but often, additional selection steps to improve the purity of a given nanoparticles’ population are necessary. These additional postsynthesis selection steps, that can include size selective precipitation, ultracentrifugation or liquid chromatography, are usually long and not well suited for a large quantity of materials. Here, we demonstrate that electrophoresis performed directly in organic solvent can be used to select and/or separate semiconductor nanoparticles according to their size and shape. In particular, we show that 2D nanoplatelets (NPL) can be very efficiently separated from spherical nanoparticles as the side product obtained during the NPL synthesis. The selectivity of the electrophoretic deposition we observe is mostly related to the nanoparticle surface charge. We show that centimeter scale, uniform film of nanoplatelets can be obtained even on nonconducting substrates. Compared to other methods this technique is fast, easy to implement and scalable, and should find various uses both in the fields of the nanoparticle synthesis and their applications.
  • Titres liés: info:eu-repo/semantics/altIdentifier/doi/10.1021/cm501713s
  • Éditeur: HAL CCSD;American Chemical Society
  • Date de publication: 2014
  • Langue: Anglais
  • Identifiant: HAL Id hal--01438634 ; DOI : 10.1021/cm501713s
  • Source: ESPCI Paris (archives ouvertes)

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