title: Peptidic ligands to control the three-dimensional self-assembly of quantum rods in aqueous media.
abstract: 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.
authors.affiliation: Université de Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du Général Leclerc, 35042, Rennes, France; Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, 35042, Rennes, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Bizien
authors.forename: Pascale
authors.initials: P
authors.lastname: Even-Hernandez
authors.forename: Marie
authors.initials: M
authors.lastname: Postic
authors.forename: Elsa
authors.initials: E
authors.lastname: Mazari
authors.forename: Soizic
authors.initials: S
authors.lastname: Chevance
authors.forename: Arnaud
authors.initials: A
authors.lastname: Bondon
authors.forename: Cyrille
authors.initials: C
authors.lastname: Hamon
authors.forename: David
authors.initials: D
authors.lastname: Troadec
authors.forename: Ludovic
authors.initials: L
authors.lastname: Largeau
authors.forename: Christophe
authors.initials: C
authors.lastname: Dupuis
authors.forename: Charlie
authors.initials: C
authors.lastname: Gosse
authors.forename: Franck
authors.initials: F
authors.lastname: Artzner
authors.forename: Valérie
authors.initials: V
authors.lastname: Marchi
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D006801:Humans; D008024:Ligands; D008027:Light; D009682:Magnetic Resonance Spectroscopy; D008854:Microscopy, Electron; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry; D010455:Peptides / Q000737:chemistry*; D045663:Quantum Dots; D012542:Scattering, Radiation; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D013050:Spectrometry, Fluorescence; D013440:Sulfides / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014965:X-Rays
chemical_list: D019187:Cadmium Compounds; D008024:Ligands; D010455:Peptides; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D014867:Water; C058667:cadmium selenide
keywords: ligands exchange; ordered structures; peptide; quantum rods; self-assembly