Browsing Citations Only by Author "Gennett, Thomas"
Now showing items 21-38 of 38
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Interconversion of conjugated and nonconjugated polyolefin cobalt complexes in two oxidation states: an electrochemical and NMR study
Geiger, William; Gennett, Thomas; Grzeszczuk, Maria; Lane, Gregg; Moraczewski, Jerome; Salzer, Albrecht; Smith, Donald (The American Chemical Society: Journal of the American Chemical Society, 1986-11-26)The kinetics of interconversion between the conjugated (1,3) and nonconjugated (1,5) isomers of cyclooctatetraene (cot) complexes of CpCo [Cp = C5H5] 1 and *CpCo [*Cp = C5Me5] 2 have been studied. Dynamic NMR studies were ... -
Investigation of the electronic structure of carbon single wall nanotube hybrid nanostructures
Engtrakul, Chaiwat; Davis, Mark; Gennett, Thomas; Dillon, Anne; Jones, Kim; Heben, Michael (Plasmonic Nano-imaging and Nanofabrication: Proceedings of the SPIE, 2005-08-03)The effects of protonation on the structure of the carbon single-walled nanotube (SWNT) polymer composites were studied by solid-state nuclear magnetic resonance (NMR) techniques and Raman spectroscopy. In addition, ... -
Laser synthesis of single-wall carbon nanotubes utilizing high temperature induction heating.
Gennett, Thomas; Dillon, Anne; Alleman, Jeffrey; Jones, K.; Parilla, Philip; Heben, Michael (Materials Research Society Proceedings: Nanotubes and Related Materials, 2001)An inductive heating system was used to control the temperature of the target during laser synthesis of SWNTs. The position of the target relative to the heating coil, the type of catalyst metals and the synthesis temperatures ... -
Protonation of carbon single-walled nanotubes studied using 13C and 1H-13C cross polarization nuclear magnetic resonance and raman spectroscopies
Engtrakul, Chaiwat; Davis, Mark; Gennett, Thomas; Dillon, Anne; Jones, Kim; Heben, Michael (The American Chemical Society: Journal of the American Chemical Society, 2005-12-14)The reversible protonation of carbon single-walled nanotubes (SWNTs) in sulfuric acid and Nafion was investigated using solid-state nuclear magnetic resonance (NMR) and Raman spectroscopies. Magic-angle spinning (MAS) was ... -
Radicals of C7-polyolefin cobalt complexes: electrochemistry, reaction routes, and structure of a resulting dimer
Geiger, William; Gennett, Thomas; Lane, Gregg (The American Chemical Society: Organometallics, 1986-07)The reduction and oxidation of several cyclopentadienyl (Cp) cobalt complexes with pi-bonded CTpolyolefin ligands have been studied by electrochemical methods. The cycloheptadienyl complex CpCo(n^5-C7H9)+ is reversibly ... -
Rapid, room temperature, high-density hydrogen adsorption on single-walled carbon nanotubes at atmospheric pressure assisted by a metal alloy
Heben, Michael; Dillon, Anne; Gennett, Thomas; Alleman, Jeffrey; Parilla, Philip; Jones, K.; Hornyak, G. (Materials Research Society 2000 Fall Meeting: Symposium A: Nanotubes and Related Materials, 2001)Laser-generated, carbon single-walled nanotubes (SWNTs) adsorb hydrogen in a matter of minutes at room temperature and atmospheric pressure in the presence of a Ti-6Al-4V metal alloy. The unusual hydrogen adsorption ... -
Reliability of standard rate constants for rapid electrochemical reactions
Gennett, Thomas; Weaver, Michael (The American Chemical Society: Analytical Chemistry, 1984-07)A method is outlined for testing the reliability of standard rate constants, k^s, for rapid electrode reactions evaluated by using electrochemical perturbation techniques. This entails monitoring the response of the apparent ... -
Role of solvent reorganization dynamics in electron-transfer processes. Theory-experiment comparisons for electrochemical and homogeneous electron exchange involving metallocene redox couples
Gennett, Thomas; Milner, David; Weaver, Michael (The American Chemical Society: Journal of Physical Chemistry, 1985-06-20)Electrochemical rate constants and activation parameters are reported for the electron exchange of five metallocene couples and bis(benzene)chromium(I/0) in eight solvents at mercury electrodes. The solvents (acetonitrile, ... -
Scanning tunneling optical resonance microscopy (STORM)
Raffaelle, Ryne; Gennett, Thomas; Lau, J.; Jenkins, P.; Castro, Stephanie; Tin, P.; Wilt, D.; Pal, A.; Bailey, Sheila (Materials Research Society Proceedings: 2002 Fall Meeting: Symposium G, 2003)The ability to determine the in-situ optoelectronic behavior of semiconductor materials has become especially important as the size of device architectures are reduced and the development of complex microsystems has ... -
A simple and complete purification of single-walled carbon nanotube materials
Dillon, Anne; Gennett, Thomas; Jones, K.; Alleman, Jeffrey; Parilla, Philip; Heben, Michael (Wiley: Advanced Materials, 1999-11) -
Single wall carbon nanotube-Nafion composite actuators
Landi, Brian; Raffaelle, Ryne; Heben, Michael; Alleman, Jeffrey; VanDerveer, William; Gennett, Thomas (The American Chemical Society: Nano Letters, 2002-11)Single wall carbon nanotube (SWNT)-Nafion composite actuators have been demonstrated for 0.1-18% w/w doping of purified SWNTs within the polymer matrix. The high purity SWNTs, >95% w/w, were homogeneously dispersed into ... -
Single wall carbon nanotube-polymer solar cells
Bailey, Sheila; Castro, Stephanie; Landi, Brian; Gennett, Thomas; Raffaelle, Ryne (NASA: Glenn Research Center Technical Reports, 2005)Investigation of single wall carbon nanotube (SWNT)-polymer solar cells has been conducted towards developing alternative lightweight, flexible devices for space power applications. Photovoltaic devices were constructed ... -
Solvent effects on the kinetics of simple electrochemical reactions. Further examination of metal ethylenediamine and ammine redox couples.
Farmer, Jane; Gennett, Thomas; Weaver, Michael (Elsevier: Journal of Electroanalytical Chemistry, 1985-09-10)The dependence of the kinetics of Co(en)33+/2+ exchange (en=ethylenediamine) at mercury electrodes upon the nature of the solvent is discussed further by examining the preexponential factors, Acorr, as well as double-layer ... -
Synthesis and characterization of boron-doped single-wall carbon nanotubes produced by the laser vaporization technique
Blackburn, Jeff; Yan, Yanfa; Engtrakul, Chaiwat; Parilla, Philip; Jones, Kim; Gennett, Thomas; Dillon, Anne; Heben, Michael (The American Chemical Society: Chemistry of Materials, 2006-05-16)We present the first successful high-yield laser vaporization synthesis of high-quality boron-doped single-wall carbon nanotubes (B-SWNTs). Boron was loaded into graphite targets in the form of elemental B as well as nickel ... -
Systematic inclusion of defects in pure carbon single-wall nanotubes and their effect on the Raman D-band
Dillon, Anne; Parilla, Philip; Alleman, Jeffrey; Gennett, Thomas; Jones, K.; Heben, Michael (Elsevier: Chemical Physics Letters, 2005-01-11)The Raman D-band feature (∼1350 cm[-][1]) is examined with 2.54 eV excitation for pure bulk carbon single-wall nanotube samples before and after treatments that increase defect densities. Upon employing mass-transport-limited ... -
Unusual oxidative behavior of (.eta.5-C5R5)M(CO)2 (R = H, CH3; M = Rh, Co) complexes at mercury and platinum electrodes
Gennett, Thomas; Grzeszczyk, Elizabeth; Jefferson, Anne; Sidur, Kathy (The American Chemical Society: Inorganic Chemistry, 1987-06-17)The electrochemical oxidative behavior of a series of cyclopentadienyl and pentamethylcyclopentadienyl carbonyl complexes of rhodium and cobalt is described. The voltammetric, polarographic, and coulometric data from the ... -
Use of poly(ester-sulfonic acid) film-coated electrodes as amperometric detectors in flow injection analysis
Gennett, Thomas; Rusin, W.; Gier, L. (Elsevier: Talanta, 1995-12)Within the past several years significant advances have been made towards the development and incorporation of chemically modified electrodes as selective detectors for high performance liquid chromatography and flow ... -
Voltammetric determination of the ion-exchange behavior of poly(ester sulfonic acid) anionomers in acentonitrille
Gennett, Thomas; Purdy, William (The American Chemical Society: Analytical Chemistry, 1990-10-01)