Abstract: A method which can be used to analyse oxidising species in a sample, including: placing the sample in contact with a first photoluminescent agent, and a second optically active agent, at least the first photoluminescent agent including nanoparticles doped with rare earth elements and being oxidisable, the luminescence of the first photoluminescent agent varying, at least at one first wavelength, with the amount of oxidising species, and the signal emitted by the second optically active agent being constant or varying, at least at one second wavelength other than the first wavelength, with the amount of oxidising species in a direction opposite to the luminescence of the first photoluminescent agent; energising the first and second agents in the sample; measuring the light intensity of the sample at least at the first and second wavelengths; and assessing the presence and/or the amount of oxidising species by interpreting the measured light intensities.

Abstract: The invention relates to a method which can be used to analyse oxidising species in a sample, comprising the steps which consist of: placing (12) the sample in contact with a first photoluminescent agent, and a second optically active agent, at least the first photoluminescent agent including nanoparticles doped with rare earth elements and being oxidisable, the luminescence of the first photoluminescent agent varying, at least at one first wavelength, with the amount of oxidising species, and the signal emitted by the second optically active agent being constant or varying, at least at one second wavelength other than the first wavelength, with the amount of oxidising species in a direction opposite to the luminescence of the first photoluminescent agent; energising (16) the first and second agents in the sample; measuring (18) the light intensity of the sample at least at said first and second wavelengths; and assessing the presence and/or the amount of oxidising species by interpreting (20) said measured l

Abstract: The present application concerns multimodal composite products for imaging, in particular for diagnostic imaging, and optionally for therapy, in particular composite products which are capable of being used as contrast agents, in particular in magnetic resonance imaging (MRI), and/or in imaging techniques such as, for example, in optical imaging, in the optical detection of oxidants, in positron emission tomography (PET), in tomodensitometry (TDM) and/or in ultrasound imaging, and optionally simultaneously for use in therapy. These products are based on a particle comprising or consisting of a portion provided with a contrast agent activity and/or a paramagnetic activity, and a portion provided with a luminescent activity and optionally an oxidant detection activity.

Abstract: A method of fabricating a transparent and birefringent mineral solid thin layer comprises the following steps: a) preparing a colloidal solution constituted by anisotropic mineral nanoparticles in suspension in a dispersion liquid; b) depositing the colloidal solution on a surface of a substrate by spreading as a thin layer while applying directional shear stress tangentially to the surface of the substrate so as to deposit the colloidal solution as a liquid thin layer on the surface of the substrate, the value of the shear stress and the concentration of mineral nanoparticles in the colloidal solution being determined in such a manner as to cause the anisotropic mineral nanoparticles to be aligned along the direction of the shear stress tangential to the surface of the substrate; and c) drying the liquid thin layer by evaporating the dispersion liquid.

Abstract: A method of fabricating a transparent and birefringent mineral solid thin layer comprises the following steps: a) preparing a colloidal solution constituted by anisotropic mineral nanoparticles in suspension in a dispersion liquid; b) depositing the colloidal solution on a surface of a substrate by spreading as a thin layer while applying directional shear stress tangentially to the surface of the substrate so as to deposit the colloidal solution as a liquid thin layer on the surface of the substrate, the value of the shear stress and the concentration of mineral nanoparticles in the colloidal solution being determined in such a manner as to cause the anisotropic mineral nanoparticles to be aligned along the direction of the shear stress tangential to the surface of the substrate; and c) drying the liquid thin layer by evaporating the dispersion liquid.

Abstract: The present application concerns multimodal composite products for imaging, in particular for diagnostic imaging, and optionally for therapy, in particular composite products which are capable of being used as contrast agents, in particular in magnetic resonance imaging (MRI), and/or in imaging techniques such as, for example, in optical imaging, in the optical detection of oxidants, in positron emission tomography (PET), in tomodensitometry (TDM) and/or in ultrasound imaging, and optionally simultaneously for use in therapy. These products are based on a particle comprising or consisting of a portion provided with a contrast agent activity and/or a paramagnetic activity, and a portion provided with a luminescent activity and optionally an oxidant detection activity.

Abstract: The present invention relates to a method for making a substrate coated with a mesoporous photochromic film, comprising: a) preparing a precursor sol of a mesoporous film comprising an inorganic precursor agent, at least one organic solvent, water, at least one pore-forming agent and one hydrophobic precursor agent bearing at least one hydrophobic group; b) depositing a film of the precursor sol onto a main surface of a substrate; c) removing the pore-forming agent from the film resulting from the previous step at a temperature ?150° C.; d) impregnating the mesoporous film resulting from step c) with a solution comprising at least one photochromic agent. In an alternative embodiment, the photochromic agent is directly introduced into the precursor sol. In an alternative embodiment of the previous alternative embodiment, the precursor sol does not comprise any hydrophobic precursor agent but the photochromic film is made hydrophobic by a treatment subsequent to its preparation.

Abstract: Hydrophobic treatment composition comprising one or more compounds, as a mixture, corresponding to the formula in which at least one R is a CaF2a+1 group, a being an integer, it being possible for another R to be an SiX3-bRC1b group, b being 0, 1 or 2 X being a hydrolysable group, such as alkoxy, hydroxyl or halo R1 being a hydrocarbon group, such as lower alkyl S is a hydrogen atom, an OH group, an alkyl group, in particular a lower alkyl group, such as CH3, or an OSiR2R3R4 group, R2, R3 and R4 being identical or different and consisting in particular of one of the abovementioned groups carried by an Si atom, such as (CH2)2—R, a hydrogen atom, an alkyl group or OSIR2R3R4, n is an integer?1, the total number of Si atoms not exceeding 20. Process for treatment by this composition. Hydrophobic glass substrate thus obtained and its application, in particular as glazing.

Abstract: The present invention relates to a method for manufacturing mesostructural coatings comprising electrically conductive structures formed of metal nanoparticles. Said method includes the steps that involve: a) depositing on a substrate, a first layer consisting of a silica material, mesostructured by a structuring agent, and a photocatalytic material: b) depositing on the first layer, a second layer of a mesostructural silica material, said second layer being free of photocatalytic material: c) consolidating the first and second layers at at temperature between 50° C. and 250° C.; and d) placing the consolidating coating in contact with a solution that contains and irradiatting coating with a radiation that enables the photocatalytic material to be activated. Said method is characterized in that it includes no heat treatment at a temperature greater than 250° C.

Abstract: The invention relates to a method of producing a substrate which is coated with a mesoporous layer and to the use thereof in ophthalmic optics. The inventive method comprises the following steps comprising: preparing a precursor sol containing (i) a precursor agent that is selected from compounds having formula M(X)4 (I), in which X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures thereof, (ii) at least one organic solvent, (iii) at least one pore-forming agent and (iv) water; depositing a film of the precursor sol on a main surface of the substrate; optionally consolidating the mesoporous structure of the deposited film; eliminating the pore-forming agent; and recovering the substrate coated with the mesoporous layer. The method is characterized in that: (i) the pore-forming agent is eliminated at a temperature of less than or equal to 150° C.

Abstract: The present invention relates to the use as an antisoiling coating of a porous coating comprising a polysiloxane matrix and a porous volume such that the potential filling ratio of the total volume of said coating by oleic acid is at least 25% by volume, having a porosity rate ranging from 25 to 70% by volume and having no photocatalytic properties. The antisoiling porous coating is self-cleaning, easy to clean and can be regenerated by simple washing. It is mainly intended for use in ophthalmic optics, and proves to be very effective against sebum. In the preferred embodiment of the invention, this coating has a mesoporous structure.

Abstract: The invention relates to a colloidal dispersion comprising rhabdophane-structured rare-earth phosphate particles (Ln) and a polyphosphate. Said dispersion is prepared by a method consisting in forming a medium comprising at least one type of rare-earth salt and a poly phosphate in such quantities that the P/Ln ratio is equal to or higher than 3, in heating the thus obtained medium and in removing residual salts, thereby obtaining said dispersion. Said invention also relates to a transparent luminescent material which is obtainable from said dispersion and based on the rare-earth phosphate particles and a polyphosphate and whose P/Ln ratio is higher than 1, to a luminescent system comprising said material and to an excitation source.

Abstract: Hydrophobic treatment composition comprising one or more compounds, as a mixture, corresponding to the formula in which at least one R is a CaF2a+1 group, a being an integer, it being possible for another R to be an SiX3-bRCb1 group, b being 0, 1 or 2 X being a hydrolysable group, such as alkoxy, hydroxyl or halo R1 being a hydrocarbon group, such as lower alkyl S is a hydrogen atom, an OH group, an alkyl group, in particular a lower alkyl group, such as CH3, or an OSiR2R3R4 group, R2, R3 and R4 being identical or different and consisting in particular of one of the abovementioned groups carried by an Si atom, such as (CH2)2—R, a hydrogen atom, an alkyl group or OSIR2R3R4, n is an integer?1, the total number of Si atoms not exceeding 20. Process for treatment by this composition. Hydrophobic glass substrate thus obtained and its application, in particular as glazing.

Abstract: The present invention relates to an article comprising a substrate having a main surface coated with a coating, part of which at least is mesoporous and has a refractive index profile with optical function, whose variation is imposed by the mesopore content and/or the filling ratio of the mesopores. The profile may be such that the refractive index varies depending on the distance to a given axis, or such that the refractive index variation is monotone, decreasing along any axis which is perpendicular to the surface of the substrate underlying the mesoporous part of said coating and oriented away from the substrate. The present invention also relates to methods for making said article, which differ depending on the technique from which the refractive index profile is created. The invention is applicable to ophthalmic optics.

Abstract: The invention relates to a transparent substrate based on glass or one or more polymers, or a ceramic or glass substrate, or a substrate made of architectural material of the type comprising a wall render, a concrete slab or block, architectural concrete, roof tile, material of cementitious composition, terracotta, slate, stone, metal surface or a fibrous substrate, based on glass of the mineral insulation wool type, or glass reinforcement yarns. This substrate is distinguished in that it is provided, on at least part of its surface, with a coating whose mesoporous structure exhibits photocatalytic properties and comprises at least partially crystallized titanium oxide. Process for manufacturing this substrate, its application in glazing, as architectural material or as mineral insulation wool is also described.

Abstract: The method comprises emitting appropriate polarisation light waves on a photosensitive material for inducing therein a topographic modification through an aperture of at the most 100 mm bound by an opaque area, said layer being arranged at the most 100 mm away from the aperture.

Abstract: The invention relates to a method of producing a substrate which is coated with a mesoporous layer and to the use thereof in ophthalmic optics. The inventive method comprises the following steps consisting in: preparing a precursor sol containing (i) a precursor agent that is selected from compounds having formula M(X)4 (I), in which X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures thereof, (ii) at least one organic solvent, (iii) at least one pore-forming agent and (iv) water; depositing a film of the precursor sol on a main surface of the substrate; optionally consolidating the mesoporous structure of the deposited film; eliminating the pore-forming agent; and recovering the substrate coated with the mesoporous layer. The method is characterized in that: (i) the pore-forming agent is eliminated at a temperature of less than or equal to 150° C.

Abstract: The invention generally concerns a method involving emitting polarization light waves through an aperture with a dimension of maximum size lower than or equal to 100 nm, wherein the aperture is circumferentially bound by an opaque area that prevents the light waves from being propagated outside the aperture during use, and wherein the emitted polarization light waves (1) contact a material layer comprising a photosensitive compound whose surface is located at a distance lower than 100 nm from said aperture, and (2) induce a topographic modification of the material layer. In this manner, a stable structure is printed in relief in the material layer without requiring any additional development step. The invention is applicable, in certain embodiments, to ophthalmic optics.

Abstract: This substrate is coated with a composite film based on a mesoporous mineral layer containing nanoparticles formed in situ inside the layer. The composite film has a periodic lattice structure over a major portion of the thickness in which the nanoparticles are present, in which structure the nanoparticles are arranged in a periodic manner on the scale of domains of at least 4 periods in the thickness of the film. This structure can be obtained from a mesoporous mineral layer of periodic structure on the scale of domains of at least 4 periods of pores, forming a matrix on the substrate, by: depositing at least one precursor in the pores of the matrix layer; and growing particles derived from the precursor with the spatial distribution and the dimensions being controlled by the structure of the pores of the matrix. Applications to materials for electronics, nonlinear optics and magnetism.

Abstract: The invention relates to a colloidal dispersion comprising rhabdophane-structured rare-earth phosphate particles (Ln) and a polyphosphate. Said dispersion is prepared by a method consisting in forming a medium comprising at least one type of rare-earth salt and a poly phosphate in such quantities that the P/Ln ratio is equal to or higher than 3, in heating the thus obtained medium and in removing residual salts, thereby obtaining said dispersion. Said invention also relates to a transparent luminescent material which is obtainable from said dispersion and based on the rare-earth phosphate particles and a polyphosphate and whose P/Ln ratio is higher than 1, to a luminescent system comprising said material and to an excitation source.