United States of America As Represented by the Administrator of Nasa

Hoechst Celanese Corporation

The United States of America As Represented by the Administrator of the

Donald M Oglesby

Anthony Neal Watkins

Bradley D Leighty

Jacqueline L Schryer

Jeffrey D Jordan

Stanley E Woodard

Bryant Douglas Taylor

David R Schryer

Suresh Thakordas Gulati

JoAnne L Ingram

Patricia P Davis

Jerry C Summers

Kenneth G Brown

Billy T Upchurch

George M Wood

Christine M D'Ambrosia

Erik J Kielin

JoAnne L Patry

George E Wells, Iv

A wireless chemical sensor includes an electrical conductor and a material separated therefrom by an electric insulator. The electrical conductor is an unconnected open-circuit shaped for storage of an electric field and a magnetic field. In the presence of a time-varying magnetic field, the first electrical conductor resonates to generate harmonic electric and magnetic field responses. The material is positioned at a location lying within at least one of the electric and magnetic field responses so-generated. The material changes in electrical conductivity in the presence of a chemical-of-interest.

Wireless chemical sensing method

Wireless chemical sensor and sensing method for use therewith

The invention described herein involves a novel approach to the production of oxidation/reduction catalytic systems. The present invention serves to stabilize the tin oxide reducible metal-oxide coating by co-incorporating at least another metal-oxide species, such as zirconium. In one embodiment, a third metal-oxide species is incorporated, selected from the group consisting of cerium, lanthanum, hafnium, and ruthenium. The incorporation of the additional metal oxide components serves to stabilize the active tin-oxide layer in the catalytic process during high-temperature operation in a reducing environment (e.g., automobile exhaust). Moreover, the additional metal oxides are active components due to their oxygen-retention capabilities. Together, these features provide a mechanism to extend the range of operation of the tin-oxide-based catalyst system for automotive applications, while maintaining the existing advantages.

Methodology for the effective stabilization of tin-oxide-based oxidation/reduction catalysts

An oxidation catalyst system is formed by particles of an oxidation catalyst dispersed in a porous sol-gel binder. The oxidation catalyst system can be applied by brush or spray painting while the sol-gel binder is in its sol state.

Sol-gel based oxidation catalyst and coating system using same

Stabilized tin-oxide-based oxidation/reduction catalysts

This invention relates generally to a ruthenium stabilized oxidation-reduction catalyst useful for oxidizing carbon monoxide, and volatile organic compounds, and reducing nitrogen oxide species in oxidizing environments, substantially without the formation of toxic and volatile ruthenium oxide species upon said oxidizing environment being at high temperatures.

Oxidation-reduction catalyst and its process of use

A sensor has a plurality of carbon nanotube (CNT)-based conductors operatively positioned on a substrate. The conductors are arranged side-by-side, such as in a substantially parallel relationship to one another. At least one pair of spaced-apart electrodes is coupled to opposing ends of the conductors. A portion of each of the conductors spanning between each pair of electrodes comprises a plurality of carbon nanotubes arranged end-to-end and substantially aligned along an axis. Because a direct correlation exists between resistance of a carbon nanotube and carbon nanotube strain, changes experienced by the portion of the structure to which the sensor is coupled induce a change in electrical properties of the conductors.

Carbon nanotube-based sensor and method for continually sensing changes in a structure

A means for detecting carbon monoxide which utilizes an un-heated catalytic material to oxidize carbon monoxide at ambient temperatures. Because this reaction is exothermic, a thermistor in contact with the catalytic material is used as a sensing element to detect the heat evolved as carbon monoxide is oxidized to carbon dioxide at the catalyst surface, without any heaters or external heating elements for the ambient air or catalytic element material. Upon comparison to a reference thermistor, relative increases in the temperature of the sensing thermistor correspond positively with an increased concentration of carbon monoxide in the ambient medium and are thus used as an indicator of the presence of carbon monoxide.

Solid state carbon monoxide sensor

A process for stabilizing sodium dithionite is disclosed, whereby a selected additive is used.

Stabilized sodium dithionite

A method of stabilizing sodium dithionite is disclosed which comprises exposing a quantity of sodium dithionite to a quantity of amino material under pressure, wherein the partial pressure of amino material is at least 0.5 atmospheres.

Method for stabilizing sodium dithionite

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Virginia Beach, VA, United States of America

Donald M Oglesby