- Permanent members: Marie-Claude Fauré, Michel Goldmann
The formation of metal–organic interface is an open question in material science with applications from colloïds (microcatalysis) to thin layers (microelectronics). In the radiolysis method, the irradiation of an aqueous solution of metal ions provokes the radiolysis of water and induces the reduction into metal atoms which latter aggregates. We develop an original approach by applying this process to Langmuir monolayer deposited on metal ions solution, expecting that the aggregation will place around the polar head to create a metallic layer which thickness is defined by the x-ray irradiation. Indeed, irradiating with an x-ray beam at grazing incidence a Langmuir monolayer of behenic acid deposited onto a silver solution, we obtain a thin silver layer anchored below the organic film. We followed the formation and structure of this metal layer by diffuse scattering, GIXD and surface x-ray fluorescence. After transfer onto a solid substrate, one obtains a thickness of about 4.5 nm for the metallic layer, in agreement with the penetration of the x-ray evanescent wave. We extend this procedure in 3D by irradiating a micelles solution containing silver atoms and obtain organo-metallic Nano-shells.
Caption: CryoTEM image of silver nano-shells (internal and external diameters of 0.9 and 2.6 nm respectively) obtained by irradiating a solution containing micelles and silver ions.
- P. Fontaine (Synchrotron SOLEIL, Gif/Yvette France)
- Fabrice Cousin (Laboratoire Leon Brillouin, CEA, Gif/Yvette France)
- Patrick Perrin (SIMM, ESPCI, Paris France)
- Judith Attia, “Self-assemblies of Linoleate and Silver for Synthesis byRadiolysis of Organic-Metal Nano-Objects”. Defense: February 2010
- Zineb Guennouni, “Study of Langmuir films of diblock copolymers and formation of inorganic nanostructures by silver ions reduction in their vicinity”.Defense: December 2014
- Louis Bondaz, “Formation of metallic nano-objects by radiolysis and / or photo-reduction of ions in the presence of self-assemblies of polyelectrolytes”. Defense: November 2017
- François Muller, Pascal Fontaine, Samy Remita, Marie-Claude Fauré, Emmanuelle Lacaze, et al.. Synthesis of Nanostructured Metal-Organic Films: Surface X-ray Radiolysis of Silver Ions Using a Langmuir Monolayer as a Template. Langmuir, American Chemical Society, 2004, 20, pp.4791-4794. ⟨10.1021/la049534u⟩. ⟨hal-00005075⟩
- S. Remita, Pascal Fontaine, C. Rochas, F. Muller, M. Goldmann. Radiation induced synthesis of silver nanoshells formed onto organic micelles. The European Physical Journal D : Atomic, molecular, optical and plasma physics, EDP Sciences, 2005, 34, pp.231. ⟨10.1140/epjd/e2005-00149-x⟩. ⟨hal-00017060⟩
- Judith Attia, S. Remita, Slavica Jonic, Emmanuelle Lacaze, Marie-Claude Fauré, et al.. Radiation-Induced Synthesis and Cryo-TEM Characterization of Silver Nanoshells on Linoleate Spherical Micelles. Langmuir, American Chemical Society, 2007, 23 (19), pp.9523. ⟨10.1021/la701366f⟩. ⟨hal-00378373⟩
- P. Fontaine, M. -C. Faure, S. Remita, F. Muller, Michel Goldmann. X-ray surface radiolysis: Kinetics of the metal-organic interface formation. The European Physical Journal. Special Topics, EDP Sciences, 2009, 167, pp.157-162. ⟨10.1140/epjst/e2009-00952-5⟩. ⟨hal-01239039⟩
- Louis Bondaz, Philippe Fontaine, François Muller, Nadège Pantoustier, Patrick Perrin, et al.. Controlled Synthesis of Gold Nanoparticles in Copolymers Nanomolds by X-ray Radiolysis. Langmuir, American Chemical Society, 2020, 36 (22), pp.6132-6144. ⟨10.1021/acs.langmuir.0c00554⟩. ⟨hal-03097716⟩