Lockheed Martin Corporation

Steven W Sinton

Peter V Bedworth

Jacob Louis Swett

Scott E Heise

Randall Mark Stoltenberg

Sarah M Simon

Padraig Moloney

John B Stetson, Jr

Gregory Scott Bruce

Arul Manickam

Peter G Kaup

Wilbur Lew

Joseph W Hahn

Thomas J Meyer

Steven L Sinsabaugh

David Nelson Coar

Jon Carmelo Russo

Duc Huynh

Andrew Raymond Mandeville

Julie Lynne Miller

Steven Edward Bullock

Bryan Neal Fisk

James Michael Krause

Stephen Michael Sekelsky

Nicholas Mauriello Luzod

Kenneth Michael Jackson

Jay T Hansen

John B Stetson

Vadim Khayms

Carey L Cates

Michael John Dimario

Joseph A Villani

Anjaney Pramod Kottapalli

Gary Edward Montgomery

Margaret Miller Shaw

David Francis Casey, Jr

Functional components of spacecraft structures can be subject to detrimental impacts by energetic particles produced from an electric propulsion system. A graphene coating applied to a functional component can maintain electrical conductivity upon a surface of the functional component, thereby allowing charge dissipation to take place, while also resisting sputtering erosion resulting from impacts of the energetic particles. Accordingly, spacecraft structures can include an electric propulsion system, a functional component that is at least partially impacted by an outflow of the electric propulsion system, and a graphene coating upon the functional component. Methods for operating such spacecraft structures can include generating an outflow of energetic particles from an electric propulsion system of a spacecraft structure, and at least partially impacting the outflow of energetic particles upon a functional component of the spacecraft structure, where the functional component has a graphene coating thereon.

Spacecraft structures incorporating graphene and operation thereof

A system for magnetic detection includes a magneto-optical defect center material including at least one magneto-optical defect center that emits an optical signal when excited by an excitation light; a radio frequency (RF) exciter system configured to provide RF excitation to the magneto-optical defect center material; an optical light source configured to direct the excitation light to the magneto-optical defect center material; and an optical detector configured to receive the optical signal emitted by the magneto-optical defect center material.

Magneto-optical detecting apparatus and methods

Various systems and methods relating to two-dimensional materials such as graphene. A membrane include a cross-linked graphene platelet polymer that includes a plurality of cross-linked graphene platelets. The cross-linked graphene platelets include a graphene portion and a cross-linking portion. The cross-linking portion contains a 4 to 10 atom link. The cross-linked graphene platelet polymer is produced by reaction of an epoxide functionalized graphene platelet and a (meth)acrylate or (meth)acrylamide functionalized cross-linker.

Two-dimensional materials and uses thereof

It can be difficult to remove atomically thin films, such as graphene, graphene-based material and other two-dimensional materials, from a growth substrate and then to transfer the thin films to a secondary substrate. Tearing and conformality issues can arise during the removal and transfer processes. Processes for forming a composite structure by manipulating a two-dimensional material, such as graphene or graphene-base material, can include: providing a two-dimensional material adhered to a growth substrate; depositing a supporting layer on the two-dimensional material while the two-dimensional material is adhered to the growth substrate; and releasing the two-dimensional material from the growth substrate, the two-dimensional material remaining in contact with the supporting layer following release of the two-dimensional material from the growth substrate.

Processes for forming composite structures with a two-dimensional material using a porous, non-sacrificial supporting layer

Sheets of graphene-based material comprising single layer graphene and suitable for formation of a plurality of perforations in the single layer graphene are provided. In an aspect, the sheets of graphene-based material are formed by chemical vapor deposition followed by one or more conditioning steps. In a further aspect, the sheets of graphene-based material include non-graphenic carbon-based material and may be characterized the amount, mobility and/or volatility of the non-graphenic carbon-based material.

Perforatable sheets of graphene-based material

Systems and methods for locating a subsurface liquid can include an excitation coil configured to induce a magnetic resonance in a subsurface liquid, an array of magnetometers associated with the excitation coil configured to detect a magnetic vector of the magnetic resonance excited subsurface liquid, and a controller in communication with the array of magnetometers and configured to locate the subsurface liquid based on magnetic signals output from the array of magnetometers.

Vector magnetometry localization of subsurface liquids

A method and system for detecting a target molecule. The method includes allowing a fluid containing the target molecule to pass by a complementary moiety attached to a paramagnetic ion so as to cause the complementary moiety and the paramagnetic ion to change a position. A magnetic effect change caused by the change in position of the paramagnetic ion is detected. The target molecule is identified based on the identity of the complementary moiety and the detected magnetic effect change.

Spin relaxometry based molecular sequencing

A method for transferring a graphene sheet from a copper substrate to a functional substrate includes forming the graphene sheet on the copper substrate using chemical vapor deposition, and irradiating the graphene sheet disposed on the copper substrate with a plurality of xenon ions using broad beam irradiation to form a prepared graphene sheet. The prepared graphene sheet is resistant to forming unintentional defects induced during transfer of the prepared graphene sheet to the functional substrate. The method further includes removing the copper substrate from the prepared graphene sheet using an etchant bath, floating the prepared graphene sheet in a floating bath, submerging the functional substrate in the floating bath, and decreasing a fluid level of the floating bath to lower the prepared graphene sheet onto the functional substrate.

Method for treating graphene sheets for large-scale transfer using free-float method

Perforated graphene sheets can be used in forming separation membranes. Separation membranes of the present disclosure, which can be used in gas separation processes in some embodiments, can include one or more polymer layers and one or more layers of perforated graphene. Methods for separating a gas mixture can include contacting a gas mixture with the separation membranes, and transiting one or more of the gases through the perforated graphene so as to affect separation.

Separation membranes formed from perforated graphene and methods for use thereof

Perforated graphene sheets can be used in forming separation membranes. Separation membranes of the present disclosure, which can be used in gas separation processes in some embodiments, can include one or more layers of perforated graphene and one or more layers of another membrane material. Methods for separating a gas mixture can include contacting a gas mixture with the separation membranes, and transiting one or more of the gases through the perforated graphene so as to affect separation.

A method for making a nanoporous membrane is disclosed. The method provides a composite film comprising an atomically thin material layer and a polymer layer, and then bombarding the composite film with energetic particles to form a plurality of pores through at least the atomically thin material layer. The nanoporous membrane also has a atomically thin material layer with a plurality of apertures therethrough and a polymer film layer adjacent one side of the graphene layer. The polymer film layer has a plurality of enlarged pores therethrough, which are aligned with the plurality of apertures. All of the enlarged pores may be concentrically aligned with all the apertures. In one embodiment the atomically thin material layer is graphene.

Nanoporous membranes and methods for making the same

A method for forming a lattice with precisely sized holes includes disposing cutter molecules with species attached about the periphery of each molecule on to the lattice. The method continues with the species cutting molecular bonds of the lattice so as to form precisely sized holes in the lattice. The edges of the holes may then be functionalized.

Methods for chemical reaction perforation of atomically thin materials

Production of bulk quantities of graphene for commercial ventures has proven difficult due to scalability issues in certain instances. Plasma-enhanced chemical vapor deposition of graphene can address at least some of these issues. Methods for production of graphene by plasma-enhanced chemical vapor deposition can include: providing a metal substrate and a carbonaceous electrode, at least a portion of the metal substrate being located proximate to the carbonaceous electrode with a gap defined therebetween; applying a potential between the metal substrate and the carbonaceous electrode; exciting a plasma-forming gas in the gap between the metal substrate and the carbonaceous electrode in the presence of the applied potential, thereby forming a plasma; ablating a reactive carbon species from the carbonaceous electrode in the presence of the plasma; and growing graphene on the metal substrate from the reactive carbon species.

Systems and methods for production of graphene by plasma-enhanced chemical vapor deposition

A polarimetric sensor includes a substrate and a plurality of aligned nanotube film patches arranged on the substrate. Each of the plurality of aligned nanotube film patches is oriented on the substrate to sense a different orientational component of electromagnetic radiation. For each of the plurality of aligned nanotube film patches, at least two contacts are arranged in electrical communication with the respective aligned nanotube film patch. The at least two electrodes are configured to conduct to an external circuit an electric signal generated in the respective aligned nanotube film patch when exposed to a respective orientational component of electromagnetic radiation.

Growing community of inventors

Palo Alto, CA, United States of America

Steven W Sinton