Now showing items 1-20 of 44

    • 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 ...
    • 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) ...
    • 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 ...
    • 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 ...
    • Interaction of microwaves with carbon nanotubes to facilitate modification 

      Tour, James M.; Dyke, Christopher A.; Stephenson, Jason J.; Yakobson, Boris I. (2011-12-20)
      The present invention is directed toward methods of crosslinking carbon nanotubes to each other using microwave radiation, articles of manufacture produced by such methods, compositions produced by such methods, and ...
    • Layer-by-layer removal of graphene 

      Tour, James M.; Dimiev, Ayrat M.; Kosynkin, Dmitry V. (2015-04-14)
      The present invention provides methods of selectively removing one or more graphene layers from a graphene material by: (1) applying a metal to a surface of the graphene material; and (2) applying a hydrogen containing ...
    • Magnetic defects in chemically converted graphene nanoribbons: electron spin resonance investigation 

      Singamaneni, Srinivasa Rao; Stesmans, Andre; van Tol, Johan; Kosynkin, D.V.; Tour, James M. (2014)
      Electronic spin transport properties of graphene nanoribbons (GNRs) are influenced by the presence of adatoms, adsorbates and edge functionalization. To improve the understanding of the factors that influence the spin ...
    • Mechanism of Graphene Oxide Formation 

      Dimiev, Ayrat M.; Tour, James M. (2014)
      Despite intensive research, the mechanism of graphene oxide (GO) formation remains unclear. The role of interfacial interactions between solid graphite and the liquid reaction medium, and transport of the oxidizing agent ...
    • Mechanism of Graphene Oxide Formation 

      Dimiev, Ayrat M.; Tour, James M. (2014)
      Despite intensive research, the mechanism of graphene oxide (GO) formation remains unclear. The role of interfacial interactions between solid graphite and the liquid reaction medium, and transport of the oxidizing agent ...
    • Metal-free silicon-molecule-nanotube testbed and memory device 

      Tour, James M.; He, Jianli; Chen, Bo; Flatt, Austen K.; Stephenson, Jason J.; Doyle, Condell D. (2010-04-27)
      Work from several laboratories has shown that metal nanofilaments cause problems in some molecular electronics testbeds. A new testbed for exploring the electrical properties of single molecules has been developed to ...
    • Method for fabrication of a semiconductor element and structure thereof 

      Or-Bach, Zvi; Tour, James M.; Yao, Jun; Cronquist, Brian (2013-03-05)
      Re-programmable antifuses and structures utilizing re-programmable antifuses are presented herein. Such structures include a configurable interconnect circuit having at least one re-programmable antifuse, wherein the at ...
    • Method for fabrication of a semiconductor element and structure thereof 

      Or-Bach, Zvi; Tour, James M.; Sinitskiy, Alexander; Yao, Jun; Beitler, Elvira (2011-07-05)
      Re-programmable antifuses and structures utilizing re-programmable antifuses are presented. Such structures include a configurable interconnect circuit having at least one re-programmable antifuse, wherein the at least one ...