Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Universitë De Bordeaux

Institut Polytechnique De Bordeaux

Universite Paul Sabatier

Cpe Lyon Formation Continue Et Recherche

Etienne Duguet

Serge Ravaine

Joseph Portier

Christophe Mingotaud

Céline Feautrier

Maxime Bronchy

Elodie Bourgeat-Lami

Mona Treguer-Delapierre

Céline Poncet-Legrand

Stéphane Mornet

Stéphane Reculusa

Stephane Mornet

A method for interconnecting components of an electronic system includes depositing a sintering solution onto a first component to form an interconnection layer, the sintering solution comprising a solvent, metal nanoparticles dispersed in the solvent, and a stabilizing agent adsorbed onto the nanoparticles. More than 95.0%, preferably more than 99.0% of the mass of the nanoparticles include a metal selected from silver, gold, copper and alloys thereof and have a polyhedral shape with an aspect ratio greater than 0.8. The method also includes eliminating, at least partially, the solvent from the layer to form an ordered agglomerate in which the nanoparticles are regularly disposed in three axes, the stabilizing agent binding them together and maintaining at least a portion of the nanoparticles at a distance from each other, debinding and sintering the layer, and depositing a second component in contact with the layer before or during debinding or sintering.

Method for interconnecting components of an electronic system by sintering

The invention relates to aqueous dispersions, comprising particles based on a magnetic iron oxide with dimensions of &#x2266;20 nm, the surface of which is modified by the grafting of aminated groups R with a covalent bonding to the surface of said particles, wherein the isoelectronic point of particles with such a modified surface is &#x2267;10. The invention further relates to a method for production of said aqueous suspensions and a method for modification of the surface of the particles present in said dispersions, in particular, by the immobilisation of polysaccharides such as dextrans, particularly for the formulation of magnetic compositions which may be administered in vivo and in particular for the formulation of injectable compositions of contrast agents for MRI.

Ferrofluids stable in neutral media and modified ferrofluids modifies obtained by modification of the surface of the particles of said ferrofluids

The invention relates to nanometric or mesoscopic dissymmetric particles, and to a method for preparing the same. The particles have an inorganic part A and a spherical organic part B bound by physicochemical or covalent interactions. Material A is a metal oxide, a metal or a metal chalcogenide. Material B is a polymer consisting of recurrent units derived from a vinyl compound. The particles are obtained by modifying the surface of material A particles with a coupling agent C having a function Fwhich exhibits affinity for the polymer, and contacting the modified inorganic particles with the precursor(s) of the polymer B, in the presence of a free radical initiator and of a surfactant in solution in a solvent.

Nanometric or mesoscopic dissymetric particles, and method for preparing same

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Bègles, France

Etienne Duguet