34 results about "Sol gel matrix" patented technology

The present invention relates to methods and compositions for the direct detection of analytes using color changes that occur in immobilized biopolymeric material in response to selective binding of analytes to their surface. In particular, the present invention provides methods and compositions related to the encapsulation of biopolymeric material into metal oxide glass using the sol-gel method.

The present invention is directed to a process for preparing a solid composite having colloidal nanocrystals dispersed within a sol-gel matrix, the process including admixing colloidal nanocrystals with an amphiphilic polymer including hydrophilic groups selected from the group consisting of —COOH, —OH, —SO₃H, —NH₂, and —PO₃H₂ within a solvent to form an alcohol-soluble colloidal nanocrystal-polymer complex, admixing the alcohol-soluble colloidal nanocrystal-polymer complex and a sol-gel precursor material, and, forming the solid composite from the admixture. The present invention is also directed to the resultant solid composites and to the alcohol-soluble colloidal nanocrystal-polymer complexes.

Improved carbon dioxide sensors are disclosed which are less sensitive to the moisture content of the environment and which are substantially insensitive to oxygen levels under normal working conditions. The CO₂ sensor comprises a pH indicator and long-lived reference luminophore and a porous sol-gel matrix. Combined CO₂ and O₂sensors are also described. Further disclose are methods of printing sensor onto substrates.

The present invention relates to a coating composition including a sol-gel matrix and a dendrimeric organochalcogeno derivative and a system including the coating composition and a substrate. The present invention also relates to a method of preventing fouling of surfaces subjected to a marine environment.

The present invention relates to methods of immobilizing nucleic acid aptamers within a sol-gel matrix. The aptamer system remains functionally intact when it is immobilized within a protein and membrane-compatible sol-gel derived from polyol silane precursors or sodium silicate.

An external gelation process is described which produces granules of metal hydride particles contained within a sol-gel matrix. The resulting granules are dimensionally stable and are useful for applications such as hydrogen separation and hydrogen purification. An additional coating technique for strengthening the granules is also provided.

In a sequential enzymatic reduction of carbon dioxide to methanol in which electrons are supplied by conversion of NADH to NAD⁺, NADH may be regenerated from the NAD⁺ by conversion of lactate to pyruvate by lactate dehydrogenase enzymes.

The invention provides nano-polymer capsules embedded with an oxygen-sensitive fluorescent indicator and a preparation method thereof, and application thereof to preparation of an oxygen-sensitive fluorescent film. The oxygen-sensitive fluorescent indicator is embedded into the nano-polymer capsules by adopting an RAFT (Reversible Additive Fragment Transfer) fine emulsion polymerization method; a core-shell structure and a surface shape of the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be accurately regulated and controlled, so that effective embedding of the oxygen-sensitive fluorescent indicator is realized and the problem that the oxygen-sensitive fluorescent indicator is easy to leak is solved; a foundation of accurately and rapidly realizing online detection of DO (Dissolved Oxygen) in real time by a dissolved oxygen sensor is obtained; and fluorinated/fluorine-free nano-polymer capsules are combined with a sol-gel technology, so that the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be uniformly dispersed into a sol-gel matrix to prepare a high-performance sol-gel oxygen-sensitive fluorescent film.

The present invention relates to a light-transmitting substrate (1) which is at least provided with a light-absorbing coating (3). The light-absorbing coating comprises stabilized pigments which are incorporated in a sol-gel matrix. The light absorbing coating comprises silica particles having a size between 5 and 100 nanometers and alumina particles having a size between 5 and 50 nanometers. The total volume concentration of pigments, silica and alumina particles in the light-absorbing coating is between 20 and 65 percent. The volume concentration of silica particles is between 5 and 40 percent and the volume concentration of alumina particles between 1 and 15 percent.

A gas analysis sensing element and a method of making the sensing element is disclosed. In one embodiment, the sensing element includes cytochrome-c embedded in a sol-gel matrix. The sol-gel matrix may take the form of a thin film or a monolith. The applicants have discovered a number of parameters for creating such a sensing element, including protein concentration, sol-gel pore size, surface area for the monolith embodiment, sol-gel components, and work-up temperature.

The present invention relates to methods of immobilizing membrane-associated molecules within a sol-gel matrix. The membrane-associated molecule is embedded in the bilayer of a liposome. The molecule-liposome assembly remains functionally intact when it is immobilized within a protein and membrane-compatible sol-gel derived from polyol silane precursors or sodium silicate.

A substrate, such as a glass, glass ceramic, ceramic or metal substrate, is provided with a thermocatalytically active coating on at least a part of the substrate surface. The thermocatalytic coating contains an inorganic lithium salt or organic lithium-containing compound in an amount that is equivalent to not less than 2 wt. % of lithium ions, based on total coating weight. The thermocatalytic coating has a glass, glass solder or sol-gel matrix in which the lithium salt or organic lithium-containing compound is introduced. Optional barrier and IR-reflecting layers are arranged between the substrate surface and the thermocatalytically active coating.

The present invention relates to methods of immobilizing membrane-associated molecules within a sol-gel matrix. The membrane-associated molecule is embedded in the bilayer of a liposome. The molecule-liposome assembly remains functionally intact when it is immobilized within a protein and membrane-compatible sol-gel derived from polyol silane precursors or sodium silicate. The activity and stability of the entrapped membrane-associated molecule was significantly improved in macroporous silica.

A method of encapsulating a population of cells in a porous matrix is disclosed. The method comprises the steps of providing a silica sol mixture, aerosolizing the silica sol mixture to form a silica sol vapor, and coating the cell population with the silica sol vapor, wherein the vapor condenses to form a sol-gel matrix encapsulating the cell population.

The invention provides a preparation method of a fluorinated modified fluorescent dissolved oxygen sensing film and a coating for preparing a protective layer. The preparation method comprises the following steps of: mixing fluorine-containing siloxane, tetraethyl orthosilicate, deionized water and absolute ethyl alcohol, and reacting the mixture under a certain condition to obtain a fluorinated modified sol-gel matrix; preparing an ethanol solution of an oxygen quenching fluorescent indicator, mixing the ethanol solution with the fluorinated modified sol-gel matrix, and ultrasonically stirring the mixture in a dark place to obtain a fluorescent sol solution; and aging the fluorescent sol solution in a dark environment at room temperature, and spin-coating the aged sol solution on the surface of a pre-treated base material by using a spin coater to obtain the fluorinated modified fluorescent dissolved oxygen sensing film. According to the preparation method, the sensitivity of the filmcan be improved, the response time is shortened, and meanwhile film cracking is avoided. The invention further provides the coating for preparing the protective layer of the fluorescent dissolved oxygen sensing film. The coating is prepared by mixing methyl phenyl silicone resin, oil-soluble organic pigment black and/or polysilicone and a curing agent. The protective layer can improve the long-term stability of the film.

The invention provides terbium-doped calcium fluoride nanoparticles, a sol-gel hybrid material and a preparation method. The preparation method comprises the following steps: S1, preparing a bonded ligand; S2, heating and mixing the bonded ligand, soluble Ca salt and soluble Tb salt in ethylene glycol, then adding a fluorine source solution, and continuing heating reaction to obtain terbium-doped calcium fluoride nanoparticles; S3, dissolving the terbium-doped calcium fluoride nanoparticles in DMF, and obtaining a solution A; dissolving tetraethoxysilane in an ethanol water solution to obtain a solution B; S4, adding the solution A into the solution B, adjusting the pH value to 2-3, adding an alkaline condensation catalyst, carrying out a catalytic condensation reaction, reducing the pH value, and carrying out an aging reaction at 40 DEG C to obtain the sol-gel hybrid material. Rare earth doped nanoparticles are grafted to a skeleton of a sol-gel matrix through relatively strong interaction covalent bonds, so that doping on a molecular level is realized, and the defects of non-uniform doping and phase separation are overcome.