Abstract: A method for manufacturing an ion sensor, especially a pH measurement sensor, based on optical fibre, including the following steps: cleaving the optical fibre, with free hydroxyl groups appearing on the cleavage surface, grafting a layer of trifunctional silane directly on free hydroxyl groups having appeared accordingly on the cleavage surface of the optical fibre, without a prior external activation step, grafting a layer of difunctional silane on the cleavage surface of the optical fibre, and grafting a fluorescent dye.

Abstract: The present invention relates to a composite material comprising a porous solid matrix having interconnected channels, said matrix comprising sulfonate groups on at least a part of the surface of said channels, wherein a sulfonate group is in ionic interaction with a quaternary ammonium of a polymerizable molecule. The present invention also relates to a method for preparing such a composite material and applications thereof.

Abstract: A method for manufacturing an ion sensor, especially a pH measurement sensor, based on optical fibre, including the following steps: cleaving the optical fibre, with free hydroxyl groups appearing on the cleavage surface, grafting a layer of trifunctional silane directly on free hydroxyl groups having appeared accordingly on the cleavage surface of the optical fibre, without a prior external activation step, grafting a layer of difunctional silane on the cleavage surface of the optical fibre, and grafting a fluorescent dye.

Abstract: The present invention relates to a cationic support notably forming a hybrid anionic membrane. The present invention notably relates to a cationic support comprising a solid inorganic support comprising pores, said pores comprising at least at the surface, bound through a covalent bond to the inorganic support, a silica gel comprising cationic groups, designated here as “cationic silica gel” or “cationic silica sol”. More particularly, the present invention relates to an anionic membrane for a fuel cell, in particular of the PEM (“polymer exchange membrane”) type.

Abstract: A process for the production of dihydrogen from hydrogenated silicon by bringing the hydrogenated silicon into contact with an alkaline solution. Devices of the fuel cell type using this hydrogen production method are also described.

Abstract: A process for the production of dihydrogen from hydrogenated silicon by bringing the hydrogenated silicon into contact with an alkaline solution. Devices of the fuel cell type using this hydrogen production method are also described.

Abstract: The present invention relates to a microfluidic device comprising at least one crystallization chamber adapted for comprising a solution in which at least one compound is present according to a concentration gradient, and wherein the geometry of said crystallization chamber allows for convection phenomena to be limited. The invention also relates to the use of said device, in particular for crystallization by counter diffusion and to a crystallization method.

Abstract: The invention relates to a miniature fuel cell powered by a hydrocarbon fuel making heavy use of micro-technologies in making and assembling the sub-assemblies of the cell. Relative to the prior art, the main innovation consists in using a semiconductor oxidised and made porous in predetermined areas, to receive an electrolytic polymer allowing the composition of the proton exchange membrane necessary for the fuel cell to operate.