Now showing items 1-20 of 62

    • Addressable SiOX memory array with incorporated diodes 

      Tour, James M.; Yao, Jun; Lin, Jian; Wang, Gunuk; Palem, Krishna (2016-07-05)
      Various embodiments of the resistive memory cells and arrays discussed herein comprise: (1) a first electrode; (2) a second electrode; (3) resistive memory material; and (4) a diode. The resistive memory material is selected ...
    • Amplification of carbon nanotubes via seeded-growth methods 

      Smalley, Richard E.; Hauge, Robert H.; Barron, Andrew R.; Tour, James M.; Schmidt, Howard K.; Billups, Edward W.; Dyke, Christopher A.; Moore, Valerie C.; Whitsitt, Elizabeth Anne; Anderson, Robin E.; Colorado Jr., Ramon; Stewart, Michael P.; Ogrin, Douglas C. (2013-10-22)
      The present invention is directed towards methods (processes) of providing large quantities of carbon nanotubes (CNTs) of defined diameter and chirality (i.e., precise populations). In such processes, CNT seeds of a ...
    • Antioxidant Carbon Particles Improve Cerebrovascular Dysfunction Following Traumatic Brain Injury 

      Bitner, Brittany R.; Marcano, Daniela C.; Berlin, Jacob M.; Fabian, Roderic H.; Cherian, Leela; Culver, James C.; Dickinson, Mary E.; Robertson, Claudia S.; Pautler, Robia G.; Kent, Thomas A.; Tour, James M. (2012)
      Injury to the neurovasculature is a feature of brain injury and must be addressed to maximize opportunity for improvement. Cerebrovascular dysfunction, manifested by reduction in cerebral blood flow (CBF), is a key factor ...
    • Atomic cobalt on nitrogen-doped graphene for hydrogen generation 

      Fei, Huilong; Dong, Juncai; Arellano-Jiménez, M. Josefina; Ye, Gonglan; Kim, Nam Dong; Samuel, Errol L.G.; Peng, Zhiwei; Zhu, Zhuan; Qin, Fan; Bao, Jiming; Yacaman, Miguel Jose; Ajayan, Pulickel M.; Chen, Dongliang; Tour, James M. (2015)
      Reduction of water to hydrogen through electrocatalysis holds great promise for clean energy, but its large-scale application relies on the development of inexpensive and efficient catalysts to replace precious platinum ...
    • Bulk separation of carbon nanotubes by bandgap 

      Tour, James M.; Dyke, Christopher A.; Flatt, Austen K. (2011-05-10)
      The present invention is directed to methods of separating carbon nanotubes (CNTs) by their electronic type (e.g., metallic, semi-metallic, and semiconducting). Perhaps most generally, in some embodiments, the present ...
    • Carbon nanotubes derivatized with diazonium species 

      Tour, James M.; Bahr, Jeffrey L.; Yang, Jiping (2010-04-06)
      The invention incorporates new processes for the chemical modification of carbon nanotubes. Such processes involve the derivatization of multi- and single-wall carbon nanotubes, including small diameter (ca. 0.7 nm) ...
    • Cobalt Nanoparticles Embedded in Nitrogen-Doped Carbon for the Hydrogen Evolution Reaction 

      Fei, Huilong; Yang, Yang; Peng, Zhiwei; Ruan, Gedeng; Zhong, Qifeng; Li, Lei; Samuel, Errol L.G.; Tour, James M. (2015)
      There is great interest in renewable and sustainable energy research to develop low-cost, highly efficient, and stable electrocatalysts as alternatives to replace Pt-based catalysts for the hydrogen evolution reaction ...
    • Detecting the Biopolymer Behavior of Graphene Nanoribbons in Aqueous Solution 

      Wijeratne, Sithara S.; Penev, Evgeni S.; Lu, Wei; Li, Jingqiang; Duque, Amanda L.; Yakobson, Boris I.; Tour, James M.; Kiang, Ching-Hwa (2016)
      Graphene nanoribbons (GNR), can be prepared in bulk quantities for large-area applications by reducing the product from the lengthwise oxidative unzipping of multiwalled carbon nanotubes (MWNT). Recently, the biomaterials ...
    • Electronic devices containing switchably conductive silicon oxides as a switching element and methods for production and use thereof 

      Tour, James M.; Yao, Jun; Natelson, Douglas; Zhong, Lin; He, Tao (2013-11-26)
      In various embodiments, electronic devices containing switchably conductive silicon oxide as a switching element are described herein. The electronic devices are two-terminal devices containing a first electrical contact ...
    • Electronic switching- memory- and sensor devices from a discontinuous graphene and/or graphite carbon layer on dielectric materials 

      Tour, James M.; Li, Yubao; Sinitskiy, Alexander (2013-05-14)
      Electronic devices comprising a dielectric material, at least one carbon sheet, and two electrode terminals are described herein. The devices exhibit non-linear current-versus-voltage response over a voltage sweep range ...
    • Enhanced MRI relaxivity of aquated Gd3+ᅠions by carboxyphenylated water-dispersed graphene nanoribbons 

      Gizzatov, Ayrat; Keshishian, Vazrik; Guven, Adem; Dimiev, Ayrat M.; Qu, Feifei; Muthupillai, Raja; Decuzzi, Paolo; Bryant, Robert G.; Tour, James M.; Wilson, Lon J. (2014)
      The present study demonstrates that highly water-dispersed graphene nanoribbons dispersed by carboxyphenylated substituents and conjugated to aquated Gd3+ᅠions can serve as a high-performance contrast agent (CA) for ...
    • Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal 

      Rice, William D.; Weber, Ralph T.; Leonard, Ashley D.; Tour, James M.; Nikolaev, Pavel; Arepalli, Sivaram; Berka, Vladimir; Tsai, Ah-Lim; Kono, Junichiro (2012)
      We have observed a nearly 4-fold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By performing temperature-dependent ESR spectroscopy ...
    • Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal 

      Rice, William D.; Weber, Ralph T.; Leonard, Ashley D.; Tour, James M.; Nikolaev, Pavel; Arepalli, Sivaram; Berka, Vladimir; Tsai, Ah-Lim; Kono, Junichiro (2012)
      We have observed a nearly 4-fold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By performing temperature-dependent ESR spectroscopy ...
    • Fabrication of graphene nanoribbons and nanowires using a meniscus as an etch mask 

      Tour, James M.; Abramova, Vera; Slesarev, Alexander (2016-05-31)
      In some embodiments, the present disclosure pertains to methods of preparing graphene nanoribbons from a graphene film associated with a meniscus, where the method comprises patterning the graphene film while the meniscus ...
    • Flame retardant polymers having pendant groups related to bisphenol-C and monomers for synthesis thereof 

      Tour, James M.; Jurs, Joshua L.; Stephenson, Jason J. (2009-12-01)
      The present invention is directed to novel flame retardant monomers and polymers, wherein the flame retardant properties of the polymers are provided by functionality in pendant groups attached to a polymer backbone (as ...
    • Functionalized- hydrogen-passivated silicon surfaces 

      Tour, James M.; Stewart, Michael P. (2010-11-23)
      This invention is generally related to a method of making a molecule-surface interface comprising at least one surface comprising at least one material and at least one organic group wherein the organic group is adjoined ...
    • Graphene compositions and drilling fluids derived therefrom 

      Tour, James M.; Schmidt, Howard K.; Lomeda, Jay R.; Kosynkin, Dmitry V.; Doyle, Condell D. (2012-05-22)
      Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide, chemically-converted graphene, and functionalized ...
    • Graphene compositions and methods for production thereof 

      Tour, James M.; Schmidt, Howard K.; Doyle, Condell D.; Kosynkin, Dmitry V.; Lomeda, Jay R. (2013-01-29)
      Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide, chemically-converted graphene, and functionalized ...
    • Graphene nanoribbons prepared from carbon nanotubes via alkali metal exposure 

      Tour, James M.; Kosynkin, Dmitry V. (2015-03-31)
      In various embodiments, the present disclosure describes processes for preparing functionalized graphene nanoribbons from carbon nanotubes. In general, the processes include exposing a plurality of carbon nanotubes to an ...
    • Hybrid molecular electronic devices containing molecule-functionalized surfaces for switching- memory- and sensor applications and methods for fabricating same 

      Tour, James M.; Stewart, Michael P.; He, Jianli; Pang, Harry F. (2013-01-29)
      This invention is generally related to a method of making a molecule-surface interface comprising at least one surface comprising at least one material and at least one organic group wherein the organic group is adjoined ...