Patents by Inventor Paul E. Sheehan
Paul E. Sheehan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11806678Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.Type: GrantFiled: March 4, 2021Date of Patent: November 7, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
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Patent number: 11103837Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane with the nanoporous membrane and the nanoporous graphene sheet in direct contact. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer, and removing the nanoporous layer of a polymer.Type: GrantFiled: March 13, 2014Date of Patent: August 31, 2021Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
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Publication number: 20210187447Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.Type: ApplicationFiled: March 4, 2021Publication date: June 24, 2021Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
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Patent number: 10762925Abstract: A patterned magnetic graphene made from the steps of transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content by using an electron beam from a scanning electron microscope to selectively remove hydrogen, wherein the step of selectively removing hydrogen occurs under a vacuum, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.Type: GrantFiled: October 10, 2018Date of Patent: September 1, 2020Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
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Patent number: 10525421Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.Type: GrantFiled: March 13, 2014Date of Patent: January 7, 2020Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
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Publication number: 20190271910Abstract: The present invention provides a method for creating patterns, with features down to the nanometer scale, in phase change materials using a heated probe. The heated probe contacts the phase change material thereby inducing a local phase change, resulting in a dramatic contrast in property—including electrical resistance, optical reflectance, and volume—relative to the uncontacted regions of the phase change material. The phase change material can be converted back to its original phase (i.e. the patterns can be erased) by appropriate thermal cycling.Type: ApplicationFiled: May 22, 2019Publication date: September 5, 2019Inventors: Laura Ruppalt, Woo K. Lee, Paul E. Sheehan, Adrian Podpirka
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Patent number: 10392248Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate.Type: GrantFiled: June 26, 2018Date of Patent: August 27, 2019Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Evgeniya H. Lock, Mira Baraket, Scott G. Walton, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
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Publication number: 20190088279Abstract: A patterned magnetic graphene made from the steps of transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content by using an electron beam from a scanning electron microscope to selectively remove hydrogen, wherein the step of selectively removing hydrogen occurs under a vacuum, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.Type: ApplicationFiled: October 10, 2018Publication date: March 21, 2019Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
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Patent number: 10134434Abstract: A method of making magnetic graphene comprising transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.Type: GrantFiled: October 20, 2015Date of Patent: November 20, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
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Publication number: 20180305202Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate.Type: ApplicationFiled: June 26, 2018Publication date: October 25, 2018Inventors: Evgeniya H. Lock, Mira Baraket, Scott G. Walton, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
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Patent number: 9895870Abstract: A method of transferring functionalized graphene comprising the steps of providing graphene on a first substrate, functionalizing the graphene and forming functionalized graphene on the first substrate, delaminating the functionalized graphene from the first substrate, and applying the functionalized graphene to a second substrate.Type: GrantFiled: February 22, 2017Date of Patent: February 20, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Keith E. Whitener, Woo K. Lee, Jeremy T. Robinson, Nabil D. Bassim, Rhonda Michele Stroud, Paul E. Sheehan
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Publication number: 20170259554Abstract: A method of transferring functionalized graphene comprising the steps of providing graphene on a first substrate, functionalizing the graphene and forming functionalized graphene on the first substrate, delaminating the functionalized graphene from the first substrate, and applying the functionalized graphene to a second substrate.Type: ApplicationFiled: February 22, 2017Publication date: September 14, 2017Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Keith E. Whitener, Woo K. Lee, Jeremy T. Robinson, Nabil D. Bassim, Rhonda Michele Stroud, Paul E. Sheehan
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Publication number: 20170242053Abstract: The present invention provides a method for creating patterns, with features down to the nanometer scale, in phase change materials using a heated probe. The heated probe contacts the phase change material thereby inducing a local phase change, resulting in a dramatic contrast in property—including electrical resistance, optical reflectance, and volume—relative to the uncontacted regions of the phase change material. The phase change material can be converted back to its original phase (i.e. the patterns can be erased) by appropriate thermal cycling.Type: ApplicationFiled: February 13, 2017Publication date: August 24, 2017Inventors: Laura Ruppalt, Woo K. Lee, Paul E. Sheehan, Adrian Podpirka
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Publication number: 20160140992Abstract: A method of making magnetic graphene comprising transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.Type: ApplicationFiled: October 20, 2015Publication date: May 19, 2016Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
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Publication number: 20120244358Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate. Also disclosed is the related composite material made by this process.Type: ApplicationFiled: March 22, 2012Publication date: September 27, 2012Inventors: Evgeniya H. Lock, Scott G. Walton, Mira Baraket, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
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Publication number: 20090255465Abstract: The present invention describes an apparatus for nanolithography and a process for thermally controlling the deposition of a solid organic “ink” from the tip of an atomic force microscope to a substrate. The invention may be used to turn deposition of the ink to the substrate on or off by either raising its temperature above or lowing its temperature below the ink's melting temperature. This process may be useful as it allows ink deposition to be turned on and off and the deposition rate to change without the tip breaking contact with the substrate. The same tip can then be used for imaging purposes without fear of contamination. This invention can allow ink to be deposited in a vacuum enclosure, and can also allow for greater spatial resolution as the inks used have lower surface mobilities once cooled than those used in other nanolithography methods.Type: ApplicationFiled: June 1, 2009Publication date: October 15, 2009Inventors: Paul E. Sheehan, Lloyd J. Whitman, William P. King
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Patent number: 7541062Abstract: The present invention describes an apparatus for nanolithography and a process for thermally controlling the deposition of a solid organic “ink” from the tip of an atomic force microscope to a substrate. The invention may be used to turn deposition of the ink to the substrate on or off by either raising its temperature above or lowing its temperature below the ink's melting temperature. This process may be useful as it allows ink deposition to be turned on and off and the deposition rate to change without the tip breaking contact with the substrate. The same tip can then be used for imaging purposes without fear of contamination. This invention can allow ink to be deposited in a vacuum enclosure, and can also allow for greater spatial resolution as the inks used have lower surface mobilities once cooled than those used in other nanolithography methods.Type: GrantFiled: September 29, 2004Date of Patent: June 2, 2009Assignee: The United States of America as represented by the Secretary of the NavyInventors: Paul E. Sheehan, Lloyd J. Whitman, William P. King