Peptidic ligands to control the three-dimensional self-assembly of quantum rods in aqueous media. - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Small Année : 2014

Peptidic ligands to control the three-dimensional self-assembly of quantum rods in aqueous media.

Soizic Chevance
Arnaud Bondon
Cyrille Hamon
Christophe Dupuis
  • Fonction : Auteur
Franck Artzner
Valérie Marchi

Résumé

The use of peptidic ligands is validated as a generic chemical platform allowing one to finely control the organization in solid phase of semiconductor nanorods originally dispersed in an aqueous media. An original method to generate, on a macroscopic scale and with the desired geometry, three-dimensional supracrystals composed of quantum rods is introduced. In a first step, nanorods are transferred in an aqueous phase thanks to the substitution of the original capping layer by peptidic ligands. Infrared and nuclear magnetic resonance spectroscopy data prove that the exchange is complete; fluorescence spectroscopy demonstrates that the emitter optical properties are not significantly altered; electrophoresis and dynamic light scattering experiments assess the good colloidal stability of the resulting aqueous suspension. In a second step, water evaporation in a microstructured environment yields superstructures with a chosen geometry and in which nanorods obey a smectic B arrangement, as shown by electron microscopy. Incidentally, bulk drying in a capillary tube generates a similar local order, as evidenced by small angle X-ray scattering.

Domaines

Chimie

Dates et versions

hal-01114542 , version 1 (09-02-2015)

Identifiants

Citer

Thomas Bizien, Pascale Even-Hernandez, Marie Postic, Elsa Mazari, Soizic Chevance, et al.. Peptidic ligands to control the three-dimensional self-assembly of quantum rods in aqueous media.. Small, 2014, 10 (18), pp.3707-16. ⟨10.1002/smll.201400300⟩. ⟨hal-01114542⟩
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