Browsing Citations Only by Author "Gennett, Thomas"

Now showing items 1-20 of 38

    • Adsorption of hydrogen on carbon single-walled nanotubes as measured by the volumetric technique 

      Parilla, Philip; Dillon, Anne; Gennett, Thomas; Alleman, Jeffrey; Jones, Kim; Heben, Michael (Materials Research Society Proceedings: Symposium A: Nanotubes and Related Materials, 2000)
      We report on hydrogen adsorption onto carbon single-walled nanotube (SWNT) material as measured by the volumetric technique. This method determines the amount adsorbed by monitoring the pressure in a known volume at a known ...

    • Assessing the hydrogen adsorption capacity of single-wall carbon nanotube / metal composites 

      Heben, Michael; Dillon, Anne; Gilbert, Katherine; Parilla, Philip; Gennett, Thomas; Alleman, Jeffrey; Hornyak, Louis; Jones, Kim (American Institute of Physics Conference Proceedings: Hydrogen in Materials and Vacuum Systems, 2003-07-11)
      Carefully controlled and calibrated experiments indicate a maximum capacity for adsorption of hydrogen on SWNTs is ~8 wt% under room temperature and pressure conditions. Samples displaying this maximum value were prepared ...

    • Carbon nanotube anodes for lithium ion batteries 

      Raffaelle, Ryne; Gennett, Thomas; Maranchi, Jeff; Kumta, Prashant; Hepp, Aloysius; Heben, Michael; Dillon, Anne; Jones, Kim (Materials Research Society Proceedings Fall 2001: Making Functional Materials with Nanotubes, 2002)
      Highly purified single-wall carbon nanotubes (SWCNT) were investigated for use as an anode material for thin film lithium ion batteries. The high purity nanotubes were obtained through chemical refinement of soot generated ...

    • Carbon nanotube doped lithium ion batteries 

      Raffaelle, Ryne; Difelice, Ron; VanDerveer, William; Gennett, Thomas; Maranchi, Jeff; Kumta, Prashant; Hepp, Aloysius (American Physical Society: Proceedings of the Annual APS March Meeting, 2002-03-18)
      We have characterized thin film lithium ion batteries that contain high purity single wall carbon nanotube-doped polymer anodes. Highly purified single-walled carbon nanotubes (SWCNT) were obtained through chemical refinement ...

    • Cp3M3(CO)3 clusters: electrocatalytic isomerization and effect of changes in metal and carbon monoxide bonding mode on electron-transfer properties 

      Mevs, Judith; Gennett, Thomas; Geiger, William (The American Chemical Society: Organometallics, 1991-05)
      The electrochemical reduction of three trinuclear complexes of general formula Cp3M3(CO)3 (Cp = n^5-cyclopentadienyl, M = Co or Rh) was studied in nonaqueous solutions. The cobalt complex Cp3CO3(CO)3 (3) is reduced by one ...

    • Development and characterization of single wall carbon nanotube–Nafion composite actuators 

      Landi, Brian; Raffaelle, Ryne; Heben, Michael; Alleman, Jeffrey; VanDerveer, William; Gennett, Thomas (Elsevier: Materials Science and Engineering B, 2005-02-15)
      The development and characterization of thin film polymeric actuators has been performed for single wall carbon nanotube (SWNT)–Nafion composite systems. Previous work in our laboratory illustrated that incorporation of ...

    • Double-layer effects on electrochemical kinetics in nonaqueous media. Dependence reactant charge for some metallocene redox couples. 

      Gennett, Thomas; Weaver, Michael (Elsevier: Journal of Electroanalytical Chemistry, 1985-05-10)
      The effect of altering the double-layer composition on standard rate constants, kob, for metallocene and related redox couples has been examined at mercury electrodes in dimethylformamide and acetonitrile containing ...

    • Effects of adsorbed O2, H2, CO2 and H2O on the optical properites of pure and polymer encapsulated single walled carbon nanotubes 

      Gennett, Thomas; Roe, Jo; VanDerveer, William; Fever, Adam; Landi, Brian; Raffaelle, Ryne; Alleman, Jeffrey; Dillon, Anne; Heben, Michael (American Physical Society: Annual APS March Meeting, 2002-03-18)
      We have measured the optical absorption spectra of single wall carbon nanotubes (SWCNTs) and SWCNT-polymer matrix samples at several temperatures and pressures. An in-situ cell was designed that allowed for heating of ...

    • Electrochemical oxidation and reduction of methylene-bridged complexes of manganese, cobalt, and rhodium 

      Geiger, William; Gennett, Thomas; McVicar, William (The American Chemical Society: Organometallics, 1987-08)
      The oxidation and reduction of a series of alkylidene-bridged dimetallic compounds containing Mn, Co, or Rh have been studied by electrochemical and spectroscopic techniques. Oxidation results in production of a cation ...

    • Electrochemical redox behaviour of the hexakis-(aryl isocyanide) complexes of molybdenum(0) and tungsten(0) 

      Bohling, D.; Mann, K.; Enger, S.; Gennett, Thomas; Weaver, Michael; Walton, Richard (Elsevier: Inorganica Chimica Acta, 1985-02-15)
      Les complexes hexakis(phénylisocyano), Mo(CNPh)[6] et W(CNPh)[6], dans le mélange d'hexafluorophosphate de tétrabutylammonium 0,2 M et de dichlorométhane, présentent une vague d'oxydation réversible à un électron à E[1/2]≃−0,2 ...

    • Electrochemical transformation of SWNT/Nafion composites 

      Liu, Ping; Lee, Se-Hee; Yan, Yanfa; Gennett, Thomas; Landi, Brian; Dillon, Anne; Heben, Michael (The Electrochemical Society: Electrochemical and Solid State Letters, 2004-10-08)
      The electrochemical performance of single wall carbon nanotube (SWNT)/Nafion composite electrodes were studied in sulfuric acid solutions. Electrochemical oxidation of the highly dispersed SWNTs within the Nafion matrix ...

    • Evaluating the purity of single-wall nanotube materials 

      Dillon, Anne; Gennett, Thomas; Parilla, Philip; Alleman, Jeffrey; Jones, K.; Heben, Michael (Materials Research Society: 2000 Fall Proceedings Symposium A: Nanotubes and Related Materials, 2001)
      Carbon single-wall nanotubes (SWNTs) have a variety of unique physical, electronic and mechanical properties. However, the SWNTs must be thoroughly purified if they are to be used in the wide array of projected applications ...

    • Fast charge-transfer reactions of binuclear complexes undergoing large changes in metal---metal bond lengths 

      Gennett, Thomas; Geiger, William; Willet, Brian; Anson, Fred (Elsevier: Journal of Electroanalytical Chemistry, 1987-05-08)
      Heterogeneous electron-transfer rates have been measured for three binuclear complexes, Cp2Fe2(CO)2(μ-SMe)2, 1, Cp2Fe2(CO)2(μ-PPh2)2, 2, and Cp2Mo2(μ-SMe)4, 3. Dahl and co-workers had shown previously that the cations of ...

    • Formation of single-wall carbon nanotube superbundles 

      Gennett, Thomas; Dillon, Anne; Alleman, Jeffrey; Jones, K.; Hasoon, F.; Heben, Michael (The American Chemical Society: Chemistry of Materials, 2000-03)
      Since their discovery in 1993, carbon single-wall nanotubes (SWNTs) have been of great interest because of their expected novel electronic, mechanical, and gas adsorption properties. Difficulties arise in measuring these ...

    • Fuel cell applications of nanotube-metal supported catalysts 

      Gennett, Thomas; Landi, Brian; Elich, J.; Jones, K.; Alleman, Jeffrey; Lamarre, P.; Morris, R.; Raffaelle, Ryne; Heben, Michael (Materials Research Society Proceedings Fall 2002: Materials for Fuel Cells and Fuel Processors, 2002-12-02)
      Novel carbon materials with nanometer dimensions are of potentially significant importance for a number of advanced technological applications. Within this report we describe the results for the electrochemical characterization ...

    • Fuel cell applications of single wall carbon nanotubes 

      Gennett, Thomas; Raffaelle, Ryne (American Institute of Aeronautics and Astronautics: International Energy Conversion Engineering Conference, 2003-08-17)
      Novel carbon materials with nanometer dimensions are of potentially significant importance for a number of advanced technological applications. Currently, considerable interest exists in the possible applications of single ...

    • Growth and characterization of multi-walled carbon nanotubes at NASA Glenn Research Center 

      Harris, Jerry; Hepp, Aloysius; Raffaelle, Ryne; Gennett, Thomas; Vander Wal, Randy; Landi, Brian; Luo, Yu; Scherson, Daniel (American Institute of Aeronautics and Astronautics, 2003-08-17)
      Aligned multi-walled carbon nanotubes were prepared by the injection chemical vapor deposition (CVD) method using an iron-based organometallic compound as the catalyst source and toluene as the solvent. The concentration ...

    • Growth of multi-walled carbon nanotubes by injection CVD using cyclopentadienyliron dicarbonyl dimer and cyclooctatetraene iron tricarbonyl 

      Harris, Jerry; Raffaelle, Ryne; Gennett, Thomas; Landi, Brian; Hepp, Aloysius (Elsevier: Materials Science and Engineering B, 2005-02-15)
      Preferential oriented multiwalled carbon nanotubes were prepared by the injection chemical vapor deposition (CVD) method using either cyclopentadienyliron dicarbonyl dimer or cycloctatetraene iron tricarbonyl as the iron ...

    • Heterogeneous electron-transfer kinetics for some multiply bonded dirhenium complexes 

      Conner, Kay; Gennett, Thomas; Weaver, Michael; Walton, Richard (Elsevier: Journal of Electroanalytical Chemistry, 1985-12-10)
      Standard electrochemical rate constants kexob have been measured for the two sequential one-electron oxidations of triply-bonded dirhenium(II) complexes Re2X4(PR3)4, where X = Cl or Br, and PR3 = a monodentate tertiary ...

    • Influence of solvent reorientation dynamics upon the kinetics of some electron-exchange reactions 

      Weaver, Michael; Gennett, Thomas (Elsevier: Chemical Physics Letters, 1985-01-11)
      The role of solvent reorientation dynamics is explored for outer-sphere electron transfer by examining the solvent-dependent rates for electrochemical exchange of selected organometallic redox couples. The observations are ...