USA As Represented by Secretary of the Navy

Other

Science Applications International Corporation

The United States of America As Represented by the Secretary of

Geo-centers, Inc.

The Government of the United States of America, As Represented by the

Paul E Schoen

Joel M Schnur

Ronald R Price

Alok Singh

Daniel Zabetakis

Jacque H Georger, Jr

Michael A Markowitz

Robert F Brady, Jr

David Curtis Turner

Jonathan S Dordick

Walter J Dressick

Banahalli R Ratna

Douglas S Clark

Bruce P Gaber

Paul Roger Kust

Paul Yager

Jeffrey M Calvert

Gan-Moog Chow

Lynn K Kurihara

Ann E Mera

Dana Leamann

Bor-Sen Chiou

Martin C Peckerar

Alan S Rudolph

Christie R Marrian

Dan Zabetakis

Mary A Testoff

Michael A Dinderman

Douglas A Kirkpatrick

Wallace M Manheimer

J Matthew Mauro

Anne W Kusterbeck

Mark S Spector

Scott M Browning

Mehran Pazirandeh

Jonas K Lodge

The present invention is directed to a method for making a conformal antenna on a surface by providing a composition comprising a polymer matrix and a plurality of metalized tubules and applying the composition to the surface as two parallel wires connected at their ends to make a closed loop with one of the parallel wires broken in the middle. Also disclosed is an alternate method for making a conformal antenna on a surface by spraying a first material comprising a polymer matrix onto the surface and simultaneously spraying a second material comprising a plurality of metalized tubules and a coagulant onto the surface, wherein the first and second materials mix together during the spraying. A further method for making a conformal antenna includes spraying a first material comprising a polymer matrix and a plurality of metalized tubules onto the surface and simultaneously spraying a second material comprising an aqueous electroless plating bath onto the surface, wherein the first and second materials mix together during the spraying.

Conductive microcylinder-based paints for integrated antennas

This invention pertains to a product and a method for preparing same. The product is an electrically conducting metallized fibers and a non-conducting composite containing the metallized fibers. In a preferred embodiment, the product is a composite of metallized cellulose fibers disposed in an electrically non-conducting matrix. The method includes the steps of hydrating cellulose fibers to prevent absorption of chemical reagents; activating the cellulose surface of the fibers for metal deposition; removing from the fibers excess activator and reagents used in the activation; drying the fibers to a free-flowing condition whereby the fibers acquire the color of the activator by virtue of its deposition on the fibers; metallizing the fibers to deposit thereon a metal capable of absorbing electromagnetic radiation; drying the metallized fibers whereby they are free-flowing; and forming a composite composed of an electrically non-conductive matrix having dispersed therein the matallized fibers.

Metallized fibers and method therefor

The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.

Microwave-attenuating composite materials, methods for preparing the same, intermediates for preparing the same, devices containing the same, methods of preparing such a device, and methods of attenuating microwaves

A composition is provided having cylindrically shaped metal or metal-coated particles and a polymer latex dispersion. A coating is provided having cylindrically shaped metal or metal-coated particles and a polymer matrix formed from a latex dispersion. The particles form a continuous, conductive network. A method of electromagnetic shielding is provided having the steps of providing the above composition, applying the composition to a surface, and drying the applied composition.

Waterborn coating containing microcylindrical conductors

Enzymes are modified by incorporating anchor sites for linking the enzymes to a target surface without destroying the catalytic activity of the enzymes. A stable carrier to accommodate and bind the selected enzyme is constructed, and the enzyme is non-covalently linked to the carrier, generally through metal salts of iminodiacetate.

Passivation of nerve agents by surface modified enzymes stabilized by non-covalent immobilization on robust, stable particles

A method of making a molecularly imprinted porous structure makes use of a surfactant analog of the molecule to be imprinted that has the imprint molecule portion serving as the surfactant headgroup. The surfactant analog is allowed to self-assemble in a mixture to create at least one supramolecular structure having exposed imprint groups. The imprinted porous structure is formed by adding reactive monomers to the mixture and allowing the monomers to polymerize, with the supramolecular structure serving as a template. The resulting solid structure has a shape that is complementary to the shape of the supramolecular structure and has cavities that are the mirror image of the imprint group. Similarly, molecularly imprinted particles may be made by using the surfactant to create a water-in-oil microemulsion wherein the imprint groups are exposed to the water phase. When reactive monomers are allowed to polymerize in the water phase to form particles, the surface of the particles have cavities that are the mirror image of the imprint group.

Molecularly-imprinted material made by template-directed synthesis

A colorimetric detector for chemical and biological agents or toxins is made of a giant unilamellar vesicle (GUV) having a membrane bilayer which is polymerized to stabilize the giant unilamellar vesicle and to provide extended conjugated polymer backbone, and the GUV has at least one incorporated molecular recognition site for the chemical and biological agents or toxins. The GUVs are about 10-300 microns and preferably made of a polymerizable diacetylenic GUV where the acyl chains are crosslinked. When the agents or toxins bind to the recognition site the detector exhibits a color change. The detector can be used in a colorimetric detector apparatus where the samples can be present in air or in water.

Method, detector, and apparatus for colorimetric detection of chemical and biological agents

A coating composite is provided for a platform surface of an antenna array for, when applied to the platform, affording isolation of radiating and receiving antennas of the array. The coating composite includes a plurality of conductively coated elongate tubes dispersed in an insulating polymer matrix at a volume loading density approaching that at which the composite begins to conduct electrically over macroscopic distances, i.e., close to the percolation threshold. The tubes are preferably comprised of microtubules comprised of biologically-derived, high-aspect rod-shaped particles of microscopic dimensions having an electroless plated metal coating thereon.

RF surface wave attenuating dielectric coatings composed of conducting, high aspect ratio biologically-derived particles in a polymer matrix

This invention pertains to a process for preparing diacetylenics, to diacetylenic compounds and to reduced diacetylenic compounds. The process includes the steps of reacting coupling an acetylenic acid in presence of cupric chloride in Ethylamine and hydroxylamine hydrochloride to form a diacetylenic diacid; reacting the diacetylenic diacid with a lithium compound, trimethylsilyl chloride and hydrochloric acid to form a diacetylenic compound; and reducing the diacetylenic compound to a reduced diacetylenic compound. The diacetylenic compounds have the formula COOH&mdash;(CH ) &mdash;C&equiv;C&mdash;C&equiv;C&mdash;(CH ) &mdash;C(&boxH;O)&mdash;R or R&mdash;C(&boxH;O)&mdash;(CH ) &mdash;C&equiv;C&mdash;C&equiv;C&mdash;(CH ) &mdash;C(&boxH;O)&mdash;R and the reduced cyclic diacetylenic compounds have the formula COOH&mdash;(CH ) &mdash;C&equiv;C&mdash;C&equiv;C&mdash;(CH ) &mdash;CH &mdash;R or R&mdash;CH &mdash;(CH ) &mdash;C&equiv;C&mdash;C&equiv;C&mdash;(CH ) &mdash;CH &mdash;R, where m is 1-18 and R is selected from alkyl groups of 1-10 and cyclic groups containing 6-35 carbon atoms and aryl moieties

Diacetylenics containing adjacent triple bonds

The present invention is a polyol method for making composite particles of two or more immiscible transition metals, where these particles are of nanoscale dimensions, and where the constituent metals are of essentially nanocrystalline morphology. The method of the invention has the steps of (1) dissolving or suspending two or more precursor metal compounds in an alcohol or polyol (diol, triol, etc.) solution, and (2) taking the solution or suspension to a temperature where the metal compound reduces, causing the first and second metals to form nanoscale composites. The term &ldquo;polyol solution&rdquo; will be used herein to describe solutions that contain either alcohol or polyol.

Synthesis of nanostructured composite particles using a polyol process

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Alexandria, VA, United States of America

Paul E Schoen