Now showing items 1-20 of 79

    • 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 ...
    • Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst 

      Fan, Xiujun; Liu, Yuanyue; Peng, Zhiwei; Zhang, Zhenhua; Zhou, Haiqing; Zhang, Xianming; Yakobson, Boris I.; Goddard, William A. III; Guo, Xia; Hauge, Robert H.; Tour, James M. (2017)
      Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C–GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The ...
    • Biocompatibility of reduced graphene oxide nanoscaffolds following acute spinal cord injury in rats 

      Palejwala, Ali H.; Fridley, Jared S.; Mata, Javier A.; Samuel, Errol L.G.; Luerssen, Thomas G.; Perlaky, Laszlo; Kent, Thomas A.; Tour, James M.; Jea, Andrew (2016)
      Background: Graphene has unique electrical, physical, and chemical properties that may have great potential as a bioscaffold for neuronal regeneration after spinal cord injury. These nanoscaffolds have previously been shown ...
    • 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) ...
    • Characterization of a novel MR-detectable nanoantioxidant that mitigates the recall immune response 

      Inoue, Taeko; Griffin, Deric M.; Huq, Redwan; Samuel, Errol L.G.; Ruano, Simone H.; Stinnett, Gary; Majid, Tabassum J.; Beeton, Christine; Tour, James M.; Pautler, Robia G. (2016)
      In many human diseases, the presence of inflammation is associated with an increase in the level of reactive oxygen species (ROS). The resulting state of oxidative stress is highly detrimental and can initiate a cascade ...
    • 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 ...