Patent application number | Description | Published |
20090137059 | Inorganic Polymers and Use of Inorganic Polymers for Detecting Nitroaromatic Compounds - A method for detecting an analyze that may be present in ambient air, bound to a surface or as part of complex aqueous media that includes providing a metallole-containing polymer or copolymer, exposing the polymer or copolymer to a suspected analyze or a system suspected of including the analyze, and measuring a quenching of photoluminescence of the metallole-containing polymer or copolymer exposed to the system. Also included is a solid state inorganic-organic polymer sensor for detecting nitroaromatic compounds that includes a substrate and a thin film of a metallole-containing polymer or copolymer deposited on said substrate. | 05-28-2009 |
20100173420 | FLUORESCENCE DETECTION OF NITROGEN-CONTAINING EXPLOSIVES AND BLUE ORGANIC LED - The invention provides a sensor for detecting nitrogen containing high explosives. The sensor includes a substrate and a blue-photoluminescent metallofluorene copolymer to be carried on said substrate during testing for nitrogen containing high explosives. The copolymer is preferably a blue-photoluminescent metallofluorene copolymer, and preferably is a vinyl bridged silafluorene copolymer. A method for detecting nitrogen containing high explosives involves exposing a copolymer to an analyte, preferably by spraying the copolymer or otherwise coating the substrate after it has been exposed to analyte and then exciting the copolymer to luminesce. The copolymer is observed for fluorescence quenching, which can be through human or electronic observation. The invention also provides for synthesis of a vinyl bridged silafluorene polymer by providing diethynylmetallofluorene and dihydrosilafluorene as precursors and conducting catalytic hydrosilation of the precursors. In a blue emitting organic light emitting diode of the invention, an emitting layer is blue-photoluminescent metallofluorene copolymer. | 07-08-2010 |
20100176837 | ULTRA-THIN ORGANIC TFT CHEMICAL SENSOR, MAKING THEREOF, AND SENSING METHOD - An embodiment of the invention is an organic thin film transistor chemical sensor. The sensor includes a substrate. A gate electrode is isolated from drain and source electrodes by gate dielectric. An organic ultra-thin semiconductor thin film is arranged with respect to the gate, source and drain electrodes to act as a conduction channel in response to appropriate gate, source and drain potentials. The organic ultra-thin film is permeable to a chemical analyte of interest and consists of one or a few atomic or molecular monolayers of material. An example sensor array system includes a plurality of sensors of the invention. In a preferred embodiment, a sensor chip having a plurality of sensors is mounted in a socket, for example by wire bonding. The socket provides thermal and electrical interference isolation for the sensor chip from associated sensing circuitry that is mounted on a common substrate, such as a PCB (printed circuit board). A method of operating an organic thin film transistor chemical sensor exposes the sensor to a suspected analyte. A low duty cycle voltage pulse train is applied to the gate electrode to reduce baseline drift while sensing for a conduction channel change. | 07-15-2010 |
20100291698 | DETECTION OF NITRO- AND NITRATE-CONTAINING COMPOUNDS - A method of the invention is a method of detecting nitramines and nitrate esters believed to be present on a sampling substrate. In the method, a sampling substrate is exposed to a first reagent that is formulated to react with nitramine- and nitrate ester-type explosives to release nitrite. The sampling substrate is then exposed to a second reagent that contains an acid to react with the nitrite and a diaminoaromatic present in either the first or second reagent, to form a triazole that will luminesce. Another method of the invention combines this process for nitramine- and nitrate ester-based explosives detection with a technique to detect nitroaromatic-based explosives using luminescent polymers, for a three-step process for the detection of explosives in these three classes. | 11-18-2010 |
20100297776 | PEROXIDE CHEMICAL SENSOR AND SENSING METHOD - Sensors, sensing systems and sensing methods of the invention provide for detection of peroxides, including for example, vapor-phase H | 11-25-2010 |
20110057116 | FLUORESCENCE DETECTION OF NITROGEN-CONTAINING EXPLOSIVES AND BLUE ORGANIC LED - The invention provides a sensor for detecting nitrogen containing high explosives. The sensor includes a substrate and a blue-photoluminescent metallofluorene copolymer to be carried on said substrate during testing for nitrogen containing high explosives. The copolymer is preferably a blue-photoluminescent metallofluorene copolymer, and preferably is a vinyl bridged silafluorene copolymer. A method for detecting nitrogen containing high explosives involves exposing a copolymer to an analyte, preferably by spraying the copolymer or otherwise coating the substrate after it has been exposed to analyte and then exciting the copolymer to luminesce. The copolymer is observed for fluorescence quenching, which can be through human or electronic observation. The invention also provides for synthesis of a vinyl bridged silafluorene polymer by providing diethynylmetallofluorene and dihydrosilafluorene as precursors and conducting catalytic hydrosilation of the precursors. In a blue emitting organic light emitting diode of the invention, an emitting layer is blue-photoluminescent metallofluorene copolymer. | 03-10-2011 |
20110081723 | Detection of Explosives Through Luminescence - A method of simultaneously detecting peroxide and nitrogen-based explosives includes the steps of applying a conversion reagent to a sample, the conversion reagent oxidizing in the presence of peroxide and inorganic nitrate explosives; applying a test reagent including a luminescent compound to the sample; exciting the luminescent compound with ultraviolet light; and simultaneously determining the presence of one or more explosives based on quenching, brightening or a shift in wavelength of the luminescence over time. Explosives may also be detected based on color changes of the sample. Optionally, phase transfer reagents, catalysts, colorimetric agents and zinc dust may be added to improve detection of explosives. Alternatively, an assay-type method may be utilized wherein a sample is added to the conversion and/or test reagents and the reagent is spotted on a substrate before exposure to ultraviolet light. | 04-07-2011 |
20110229576 | HOLLOW SILICA NANOSPHERES AND METHODS OF MAKING SAME - The disclosure provide hollow nanospheres and methods of making and using the same. The methods and compositions of the disclosure are useful for drug delivery and gene transfer. | 09-22-2011 |
20130230570 | HOLLOW SILICA NANOSPHERES AND METHODS OF MAKING SAME - The disclosure provide hollow nanospheres and methods of making and using the same. The methods and compositions of the disclosure are useful for drug delivery and gene transfer. | 09-05-2013 |
20140017130 | THIN LAYER HIGH EXPLOSIVE FLUORESCENT POLYMER SENSING METHODS, SENSORS AND KITS - A sensor for high explosives, comprising a thin layer of fluorescent polymer covalently linked to a silica support with an oxide surface. The support preferably is a silica support, and in a preferred embodiment is a silica chromatographic support. In preferred embodiments, the fluorescent polymer is one or a few monolayers. A preferred embodiment sensor for high explosives is fluorescent polymer within or upon a porous nanostructure. In preferred embodiments the nanostructure is a porous silica nanoparticle. Embodiments of the invention provide methods, sensors, sensor kits, and sensor fabrication processes that enable detecting traces of high explosives by fluorescence quenching in combination with a chromatographic separation. A method for forming a sensor for high explosives includes preparing a fluorescent polymer, capping the reactive polymer with a reactive capping group that covalently reacts with hydroxide groups, and reacting the reactive capping group with surface hydroxides of an oxide support. | 01-16-2014 |