title: Dispersion of Hydrophobic Co Supracrystal in Aqueous Solution.
abstract: Assembly of nanoparticles into supracrystals provides a class of materials with interesting optical and magnetic properties. However, supracrystals are mostly obtained from hydrophobic particles and therefore cannot be manipulated in aqueous systems, limiting their range of applications. Here, we show that hydrophobic-shaped supracrystals self-assembled from 8.2 nm cobalt nanoparticles can be dispersed in water by coating the supracrystals with lipid vesicles. A careful characterization of these composite objects provides insights into their structure at different length scales. This composite, suspended in water, retains the crystalline structure and paramagnetic properties of the starting material, which can be moved with an applied magnetic field.
authors.affiliation: Sorbonne Universités , UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France.|CNRS, UMR 8233, MONARIS, F-75005 Paris, France.
authors.forename: Nailiang
authors.initials: N
authors.lastname: Yang
authors.affiliation: Sorbonne Universités , UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France.|CNRS, UMR 8233, MONARIS, F-75005 Paris, France.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Institute of Integrative Biology, University of Liverpool , Crown Street, L69 7ZB Liverpool, United Kingdom.
authors.forename: Marie
authors.initials: M
authors.lastname: Held
authors.affiliation: CEA/IRAMIS, CEA Saclay, 91191, Gif-sur-Yvette, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Bonville
authors.affiliation: CNRS, UMR 8502 Laboratoire de Physique des Solides, Université Paris-Sud , 91405 Orsay, France.
authors.forename: Pierre-Antoine
authors.initials: PA
authors.lastname: Albouy
authors.affiliation: Institute of Integrative Biology, University of Liverpool , Crown Street, L69 7ZB Liverpool, United Kingdom.
authors.forename: Raphaël
authors.initials: R
authors.lastname: Lévy
authors.affiliation: Sorbonne Universités , UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France.|CNRS, UMR 8233, MONARIS, F-75005 Paris, France.|CEA/IRAMIS, CEA Saclay, 91191, Gif-sur-Yvette, France.
authors.forename: Marie-Paule
authors.initials: MP
authors.lastname: Pileni
mesh_terms: D003035:Cobalt / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008081:Liposomes / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D019301:Oleic Acid / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry
chemical_list: D008081:Liposomes; D010743:Phospholipids; D019301:Oleic Acid; D003035:Cobalt
keywords: supracrystals; supraligands; vesicles; water-dispersed