Patents by Inventor Pulickel M. Ajayan
Pulickel M. Ajayan 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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Publication number: 20150090607Abstract: The present disclosure pertains to methods of protecting a surface (e.g., a metal surface) from corrosion by conformably attaching a hybrid device comprising at least one multilayer energy storage device and at least one energy conversion device.Type: ApplicationFiled: October 1, 2014Publication date: April 2, 2015Inventors: Charudatta Galande, Neelam Singh, Suman Khatiwada, Pulickel M. Ajayan
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Publication number: 20150027615Abstract: The present invention provides additive manufacturing methods of forming multilayer energy storage devices on a surface by formulating all components of the multilayer energy storage device into liquid compositions and: (1) applying a first liquid current collector composition above the surface to form a first current collector layer above the surface; (2) applying a first liquid electrode composition above the first current collector layer to form a first electrode layer above the first current collector layer; (3) applying a liquid electrically insulating composition above the first electrode layer to form an electrically insulating layer above the first electrode layer; (4) applying a second liquid electrode composition above the electrically insulating layer to form a second electrode layer above the electrically insulating layer; and (5) applying a second liquid current collector composition above the second electrode layer to form a second current collector layer above the second electrode layer.Type: ApplicationFiled: March 15, 2013Publication date: January 29, 2015Applicant: William Marsh Rice UniversityInventors: Neelam Singh, Charudatta Galande, Akshay Mathkar, Leela M. Reedy Arava, Pulickel M. Ajayan, Alexandru Vlad
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Patent number: 8906984Abstract: Metal/metal oxide nanoparticle-embedded polymer films were synthesized in situ wherein the polymerizing agent was utilized for both reduction and polymerization (such as curing). This in situ method avoids the use of any external reducing agent/stabilizing agent and leads to a uniform distribution of nanoparticles in the polymer matrix. In some embodiments, additional heating can be utilized to form the nanoparticles embedded in the polymer film.Type: GrantFiled: August 7, 2009Date of Patent: December 9, 2014Assignee: William Marsh Rice UniversityInventors: Pulickel M. Ajayan, Ashavani Kumar, Anubha Goyal
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Publication number: 20140315096Abstract: In some embodiments, the present disclosure pertains to energy storage compositions that comprise a clay and an ionic liquid. In some embodiments, the clay is a bentonite clay and the ionic liquid is a room temperature ionic liquid (RTIL). In some embodiments, the clay and the ionic liquid are present in the energy storage compositions of the present disclosure in a weight ratio of 1:1. In some embodiments, the ionic liquid further comprises a lithium-containing salt that is dissolved in the ionic liquid. In some embodiments, the energy storage compositions of the present disclosure further comprise a thermoplastic polymer, such as polyurethane. In some embodiments, the thermoplastic polymer constitutes about 10% by weight of the energy storage composition. In some embodiments, the energy storage compositions of the present disclosure are associated with components of energy storage devices, such as electrodes and separators.Type: ApplicationFiled: February 26, 2014Publication date: October 23, 2014Applicants: Universidade Federal de Minas Gerais, William Marsh Rice UniversityInventors: Raquel Silveira Borges, Kaushik Kalaga, Marco Tulio Fonseca Rodrigues, Hemtej Gullapalli, Leela Mohana Reddy Arava, Kaushik Balakrishnan, Glaura Goulart Silva, Pulickel M. Ajayan
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Publication number: 20140251204Abstract: In some embodiments, the present disclosure pertains to methods of growing chalcogen-linked metallic films on a surface in a chamber. In some embodiments, the method comprises placing a metal source and a chalcogen source in the chamber, and gradually heating the chamber, where the heating leads to the chemical vapor deposition of the chalcogen source and the metal source onto the surface, and facilitates the growth of the chalcogen-linked metallic film from the chalcogen source and the metal source on the surface. In some embodiments, the chalcogen source comprises sulfur, and the metal source comprises molybdenum trioxide. In some embodiments, the growth of the chalcogen-linked metallic film occurs by formation of nucleation sites on the surface, where the nucleation sites merge to form the chalcogen-linked metallic film. In some embodiments, the formed chalcogen-linked metallic film includes MoS2.Type: ApplicationFiled: March 11, 2014Publication date: September 11, 2014Applicant: William Marsh Rice UniversityInventors: Sina Najmaei, Zheng Liu, Pulickel M. Ajayan, Jun Lou
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Publication number: 20140120453Abstract: The present invention relates to patterned graphite oxide films and methods to make and use same. The present invention includes a novel strategy developed to imprint any required conductive patterns onto self-assembled graphene oxide (GO) membranes.Type: ApplicationFiled: March 18, 2011Publication date: May 1, 2014Applicants: NanoHoldings, LLC, William Marsh Rice UniversityInventors: Pulickel M. Ajayan, Bhabendra K. Pradhan, Wei Gao
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Publication number: 20140084219Abstract: In some embodiments, the present invention pertains to carbon nanotube fibers that include one or more fiber threads. In some embodiments, the fiber threads include doped multi-walled carbon nanotubes, such as doped double-walled carbon nanotubes. In some embodiments, the carbon nanotubes are functionalized with one or more functional groups. In some embodiments, the carbon nanotube fibers are doped with various dopants, such as iodine and antimony pentafluoride. In various embodiments, the carbon nanotube fibers of the present invention can include a plurality of intertwined fiber threads that are twisted in a parallel configuration with one another. In some embodiments, the carbon nanotube fibers include a plurality of fiber threads that are tied to one another in a serial configuration. In some embodiments, the carbon nanotube fibers of the present invention are also coated with one or more polymers.Type: ApplicationFiled: February 28, 2012Publication date: March 27, 2014Applicant: William Marsh Rice UniversityInventors: Yao Zhao, Jinquan Wei, Padraig G. Moloney, Pulickel M. Ajayan, Enrique V. Barrera
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Patent number: 8535791Abstract: Aligned carbon nanotube-polymer composite materials, systems and methods include a substrate that carries an adhesive coating thereon. A plurality of carbon nanostructures are adhered to the substrate by the adhesive coating, such that the nanostructures are formed into a predetermined architecture, such that the architecture of the nanostructures defines at least one orientation for a plurality of nanostructures, and defies the approximate spacing between the nanostructures and/or groups of nanostructures. The adherence of the carbon nanostructures in the adhesive coating stabilizes the predetermined architecture of the nanostructures, such that the architecture renders the composite material superhydrophobic.Type: GrantFiled: February 11, 2009Date of Patent: September 17, 2013Assignees: The University of Akron, Rensselaer Polytechnical InstituteInventors: Ali Dhinojwala, Pulickel M. Ajayan, Sunny Sethi
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Publication number: 20130069271Abstract: The present invention provides methods of strengthening composites. In some embodiments, such methods generally comprise a step of applying a dynamic stress to the composite in order to increase at least one of the stiffness or strength of the composite. In some embodiments, the composite comprises: a polymer matrix; nanomaterial fillers; and an interphase between the polymer matrix and the nanomaterial fillers. In some embodiments, the stiffness or strength of the composite increases permanently in response to the applied stress. In some embodiments, the increase in the stiffness or strength of the composite may be associated with an increase in the storage modulus of the composite, a decrease in the loss modulus of the composite, and a decrease in the loss tangent of the composite. In some embodiments, the applied stress results in a rearrangement of the interphase.Type: ApplicationFiled: June 22, 2012Publication date: March 21, 2013Applicant: William Marsh Rice UniversityInventors: Pulickel M. Ajayan, Brent Joseph Carey
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Publication number: 20130017453Abstract: A fabrication process for conformal coating of a thin polymer electrolyte layer on nanostructured electrode materials for three-dimensional micro/nanobattery applications, compositions thereof, and devices incorporating such compositions. In embodiments, conformal coatings (such as uniform thickness of around 20-30 nanometer) of polymer Polymethylmethacralate (PMMA) electrolyte layers around individual Ni—Sn nanowires were used as anodes for Li ion battery. This configuration showed high discharge capacity and excellent capacity retention even at high rates over extended cycling, allowing for scalable increase in areal capacity with electrode thickness. Such conformal nanoscale anode-electrolyte architectures were shown to be efficient Li-ion battery system.Type: ApplicationFiled: December 10, 2010Publication date: January 17, 2013Applicant: William Marsh Rice UniversityInventors: Pulickel M. Ajayan, Fung Soung Ou, Manikoth M. Shajiumon, Sanketh R. Gowda, Arava L.M. Reedy
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Patent number: 8310134Abstract: Compositions and devices for harvesting electrical energy from mechanical and thermal energy, storing such produced energy, and sensing strain based on low cost materials and processes. In embodiments, the compositions are flexible and include a flexible polymer embedded and coated with a nanostructured piezoelectric material.Type: GrantFiled: January 22, 2010Date of Patent: November 13, 2012Assignee: William Marsh Rice UniversityInventors: Pulickel M. Ajayan, Ashavani Kumar, Andres Rafael Botello-Mendez, Hemtej Gullapalli, Mauricio Terrones Maldonado
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Publication number: 20120238021Abstract: Methods for synthesizing macroscale 3D heteroatom-doped carbon nanotube materials (such as boron doped carbon nanotube materials) and compositions thereof. Macroscopic quantities of three-dimensionally networked heteroatom-doped carbon nanotube materials are directly grown using an aerosol-assisted chemical vapor deposition method. The porous heteroatom-doped carbon nanotube material is created by doping of heteroatoms (such as boron) in the nanotube lattice during growth, which influences the creation of elbow joints and branching of nanotubes leading to the three dimensional super-structure. The super-hydrophobic heteroatom-doped carbon nanotube sponge is strongly oleophilic and an soak up large quantities of organic solvents and oil. The trapped oil can be burnt off and the heteroatom-doped carbon nanotube material can be used repeatedly as an oil removal scaffold.Type: ApplicationFiled: March 19, 2012Publication date: September 20, 2012Applicant: William Marsh Rice UniversityInventors: Daniel Paul Hashim, Pulickel M. Ajayan, Mauricio Terrones
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Publication number: 20110241536Abstract: The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, electronics and display technologies, or in a wide variety of other areas where organized nano structures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within polymers or other flexible materials to provide a flexible skin-like material, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications. In one aspect, the invention is directed to a carbon nanotube/polymer composite material having a plurality of carbon nanotubes formed into a predetermined architecture, with each of the plurality of nanotubes having a desired width and length.Type: ApplicationFiled: April 18, 2011Publication date: October 6, 2011Applicant: THE UNIVERSITY OF AKRONInventors: Pulickel M. Ajayan, Ali Dhinojwala
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Patent number: 7927666Abstract: The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, electronics and display technologies, or in a wide variety of other areas where organized nanostructures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within polymers or other flexible materials to provide a flexible skin-like material, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications. In one aspect, the invention is directed to a carbon nanotube/polymer composite material having a plurality of carbon nanotubes formed into a predetermined architecture, with each of the plurality of nanotubes having a desired width and length.Type: GrantFiled: June 30, 2006Date of Patent: April 19, 2011Assignees: The University of Akron, Rensselaer Polytechnic InstituteInventors: Pulickel M. Ajayan, Ali Dhinojwala
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Publication number: 20100215724Abstract: A nanotube device comprises a gel matrix that includes microcapsules and functionalized nanotubes, or other functionalized nanostructures incorporated into said gel matrix. Pharmaceutical compositions and methods of treatment comprising same. The pharmaceutical compositions of the present invention enable the specific and targeted delivery of therapeutic agents such as DNA molecules, peptides, including antibodies, drug molecules (e.g. small organic molecules), while offering sufficient resistance towards mucus layer of the intestine and high concentrations of enzymes and other molecules found in the blood stream and the GI tract.Type: ApplicationFiled: November 22, 2006Publication date: August 26, 2010Inventors: Satya Prakash, Hongmei Chen, Pavan Raja, Omkaram Nalamasu, Pulickel M. Ajayan
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Publication number: 20100075024Abstract: The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, electronics and display technologies, or in a wide variety of other areas where organized nanostructures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within polymers or other flexible materials to provide a flexible skin-like material, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications. In one aspect, the invention is directed to a carbon nanotube/polymer composite material having a plurality of carbon nanotubes formed into a predetermined architecture, with each of the plurality of nanotubes having a desired width and length.Type: ApplicationFiled: June 30, 2006Publication date: March 25, 2010Applicant: THE UNIVERSITY OF AKRONInventors: Pulickel M. Ajayan, Ali Dhinojwala
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Publication number: 20100075130Abstract: A branched nanostructure, includes at least one of (a) a stem and at least two levels of branches; or (b) a stem connected to three of more branches; or (c) a nanowire nanostructure comprising a stem and two or more branches; or (d) a stem connected to two or more branches, where the stem and the branches comprise a different material composition or structure.Type: ApplicationFiled: May 17, 2006Publication date: March 25, 2010Inventors: Guowen Meng, Pulickel M. Ajayan, Yung Joon Jung
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Patent number: 7615204Abstract: Long, macroscopic nanotube strands or cables, up to several tens of centimeters in length, of aligned single-walled nanotubes are synthesized by the catalytic pyrolysis of n-hexane using an enhanced vertical floating catalyst CVD technique. The long strands of nanotubes assemble continuously from ropes or arrays of nanotubes, which are intrinsically long. These directly synthesized long nanotube strands or cables can be easily manipulated using macroscopic tools.Type: GrantFiled: February 24, 2003Date of Patent: November 10, 2009Assignees: Rensselaer Polytechnic Institute, Tsinghua UniversityInventors: Pulickel M. Ajayan, Bingqing Wei, Hongwei Zhu, Cailu Xu, Dehai Wu
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Publication number: 20090269560Abstract: The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, self-cleaning applications, electronics and display technologies, or in a wide variety of other areas where organized nanostructures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within an adhesive, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications.Type: ApplicationFiled: February 11, 2009Publication date: October 29, 2009Applicants: The University of Akron, Rensselaer Polytechnical InstituteInventors: Ali Dhinojwala, Pulickel M. Ajayan, Sunny Sethi
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Publication number: 20090126783Abstract: An optical absorber includes vertically aligned carbon nanotubes with an ultra-low reflectance less than 0.16% and an absorption efficiency greater than 99.84%. The index of refraction and the absorption constant are controlled by independently varying the nanotube diameter and nanotube spacing. The nanotubes are mostly double-walled. The density of the nanotube arrays is very low, around 0.015 g/cm3.Type: ApplicationFiled: November 12, 2008Publication date: May 21, 2009Inventors: Shawn-Yu Lin, James A. Bur, Zu-Po Yang, Lijie Ci, Pulickel M. Ajayan