Peptidic Ligands to Control the Three‐Dimensional Self‐Assembly of Quantum Rods in Aqueous Media |
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Authors: | Thomas Bizien Pascale Even‐Hernandez Marie Postic Elsa Mazari Soizic Chevance Arnaud Bondon Cyrille Hamon David Troadec Ludovic Largeau Christophe Dupuis Charlie Gosse Franck Artzner Valérie Marchi |
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Affiliation: | 1. Université de Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du Général Leclerc, , 35042 Rennes, France;2. Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, , 35042 Rennes, France;3. Laboratoire de Photonique et de Nanostructures, LPN‐CNRS, , 91460 Marcoussis, France;4. Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), CNRS UMR 8520, Cité Scientifique, , 59655 Villeneuve d'Ascq, France |
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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. |
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Keywords: | quantum rods self‐assembly peptide ligands exchange ordered structures |
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