Université Paris 7—denis Diderot

Centre National De La Recherche Scientifique

Alchimer

Alchimedics

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

Alchimer S.a.

Jean Pinson

Christophe Bureau

Olivier Fagebaume

Jean-Michel Saveant

Bernadette Charleux

Maud Save

Mohamed Mehdi Chehimi

Christopher Tronche

Tarik Matrab

Christian Perruchot

Eva Cabet-Deliry

Fetah Podvorica

Jean Dijon

Claude Andrieux

Xavier Joyeux

Felipe Gonzalez

The invention relates to a method for deposition of nanoparticles made of an insulating, semi-conductive, or conductive material onto predetermined areas, made of a conductive or semi-conductive material, located on a substrate. The invention also relates to a method for manufacturing electrodes. The method of the invention includes the steps of a) creating insulating material areas I around areas Z when said areas I are not already present; b) deposition, by means of electrografting, of a polymer P prepared from a diazonium salt or vinyl monomer salt, or a mixture of the above, onto the conductive or semi-conductive material that forms the areas Z; c) coating the nanoparticles with a coating material that includes a bifunctional molecule capable of creating a bond with the nanoparticles and a bond with the polymer P; d) suspending the coated nanoparticles obtained in Step c) in a solvent, preferably a coating material solution used in Step c); e) immersing the substrate S obtained in Step b) into the suspension obtained in Step d); and f) removing the polymer P. The invention is in particular useful for manufacturing electrodes.

Selective nanoparticle deposition

The use of at least one diazonium salt bearing an initiator function, for forming an undercoat obtained by grafting a graft derived from the diazonium salt and bearing an initiator function at the surface of a conductive or semiconductive material on the undercoat, and for forming on the undercoat a polymeric layer obtained by polymerization, in particular free radical polymerization, in situ of at least one monomer, initiated from the initiator function.

Modified surface material, method for preparing same and uses thereof

The present invention relates to the use of a R&#x2014;Ndiazonium salt carrying an aromatic group R, for grafting of the aromatic group onto insulating, semiconductor, binary or ternary compound or composite material surfaces, the diazonium salt being present at a concentration close to its solubility limit, notably at a concentration higher than 0.05 M, and preferably varying between approximately 0.5 M to approximately 4 M.

Method for modifying insulating or semi-conductive surfaces, and resulting products

The present invention concerns the use of RO. radicals, R being a hydrogen, an alkyl group having 2 to 15 carbons, an acyl group &#x2014;COR' in which R&#x2032; represents an alkyl group having 2 to 15 carbons, or an aroyl group &#x2014;COAr in which Ar represents an aromatic group having 6 to 15 carbons, for the hydroxylation, alkoxylation or oxycarbonylation of polymer surfaces, the said polymers being different from polymers chosen from: polymethylmethacrylate (PMMA) and fluorocarbon polymers when R represents a hydrogen, or of polymer mixture surfaces, notably hydrophobic ones, the said polymers consisting in monomeric units of which at least 50% among these are aliphatic units, and the said RO. radicals being generated by electrochemical or photochemical means.

Modification process for polymer surfaces, notably for hydroxylation of polymer surfaces and products so obtained

Described is the use of ROradicals, R being a hydrogen, an alkyl group having 2 to 15 carbons, an acyl group &#x2014;COR' in which R&#x2032; represents an alkyl group having 2 to 15 carbons, or an aroyl group &#x2014;COAr in which Ar represents an aromatic group having 6 to 15 carbons, for the hydroxylation, alkoxylation or oxycarbonylation of polymer or polymer mixture surfaces, the said polymers consisting in monomeric units of which at least 50% among these are aromatic units and the said ROradicals being generated by electrochemical or photochemical methods.

The invention concerns a metal material with a surface which is modified by bonding an aromatic group, optionally substituted by a functional group, on the surface. In one embodiment, an aromatic group is attached to the surface by electrochemical reduction of a diazonium salt containing the aromatic group. The metal material is brought into contact with a solution of the diazonium salt in a solvent and negatively polarized relative to an anode that is also in contact with the solution. A carbon-metal bond of the covalent type is formed.

Electromechanical reduction of a diazonium salt to modify the surface of a metallic material

Methods for producing by electrochemical reduction a carbon-containing material with its surface modified by organic groups, in particular functionalized organic groups. Certain embodiments of the methods include contacting the carbon-containing material with an organic diazonium salt in solvent, optionally in the presence of an electrolyte and negatively polarizing the carbon-containing material relative to an anode also in contact with an electrolytic solution separate from said diazonium salt solution, wherein the electrochemical reduction is carried out on an organic diazonium salt in protic solvent in an acid medium. Carbon-containing materials with a surface modified by organic groups and the use of these modified materials, for example for producing composite materials or for fixing molecules of biological interest, are taught.

Process for the electrochemical production of a carbon-containing material whose surface is modified with organic groups, and use of the modified material

A metal material whose surface is modified by bonding of aromatic groups, optionally substituted by functional groups.

Metal material with modified surface, preparation method and use of same

A method for producing by electrochemical reduction a carbon-containing material with its surface modified by organic groups, in particular functionalized organic groups, contacting the carbon-containing material with an organic diazonium salt in solvent, optionally in the presence of an electrolyte; negative polarisation of the carbon-containing material relative to an anode also in contact with an electrolyte solution separate from the diazonium salt solution. The electrochemical reduction is carried out on an organic diazonium salt in protic solvent in an acid medium.

The invention concerns a process for electrochemically producing a carbonaceous material with its surface modified by organic groups, in particular functionalized organic groups. The process comprises providing a solution, in a protic or aprotic solvent, comprising a salt of a carboxylate of an organic residue capable of undergoing a Kolbe reaction. The solution is then put in contact with a carbonaceous material, wherein the carbonaceous material is positively polarized with respect to a cathode that is also in contact with the solution. The solution may optionally contain an electrolyte. The invention also concerns carbonaceous materials modified at the surface with arylmethyl groups and the use of these modified materials, for example, in the production of composite materials.

Process for electrochemically producing a carbonaceous material with a surface modified by functionalized groups, novel surface-modified carbonaceous material and application of this material

Growing community of inventors

Fontenay-sous-Bois, France

Jean Pinson