Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Carl D. Scott"'
Autor:
Robert H. Hauge, and J. Albert Schultz, Leonard Yowell, Sivaram Arepalli, Michael Ugarov, Edward D. Sosa, Carl D. Scott
Publikováno v:
The Journal of Physical Chemistry C. 111:36-44
Samples from nanotubes produced by various methods are analyzed by laser desorption-ionization ion mobility time-of-flight mass spectrometry (LDI-IM-TOF-MS). The measurements find mostly positive f...
Publikováno v:
Carbon. 43:2453-2462
Experiments and modeling have been performed to predict the effect of gas pressure on species distribution and nanotube growth rate under specific conditions of synthesis of singlewall carbon nanotubes (SWCNTs) by arc discharge. Numerical results wer
Autor:
Robert H. Hauge, Sivaram Arepalli, W. E. Billups, Carl D. Scott, Haiqing Peng, Pasha Nikolaev, Richard E. Smalley, Anil K. Sadana, R. Carver
Publikováno v:
Journal of Nanoscience and Nanotechnology. 5:1035-1040
Using the High Pressure carbon monoxide (HiPco) reactor we conducted an experiment on the effects of changing the catalyst concentration. With each catalyst concentration tested the resulting raw HiPco material was characterized for average SWNT leng
Autor:
Pavel Nikolaev, Johan Grand, Pascale Launois, J. Y. Mevellec, M. Lamy de la Chapelle, Ivaylo Hinkov, Samir Farhat, Vincent Pichot, Serge Lefrant, Carl D. Scott
Publikováno v:
Journal of Applied Physics. 95:2029-2037
The diameter distribution of the nanotubes produced by electric-arc discharge are measured using Raman spectroscopy at various wavelengths. These measurements agree with the results provided by two other techniques: high-resolution transmission elect
Autor:
Carl D. Scott, Patrick Bernier, Catherine Journet, Annick Loiseau, Marc Lamy de la Chapelle, Serge Lefrant, Samir Farhat
Publikováno v:
Journal of Chemical Physics
Journal of Chemical Physics, American Institute of Physics, 2001, 115 (14), pp.6752-6759. ⟨10.1063/1.1390526⟩
Journal of Chemical Physics, American Institute of Physics, 2001, 115 (14), pp.6752-6759. ⟨10.1063/1.1390526⟩
A method is reported for controlling the diameter of single-walled carbon nanotubes (SWCNTs) during the electric-arc-discharge process. Using argon as inert atmosphere provides smaller diameters as compared with those when pure helium is used. Varyin
Publikováno v:
Journal of Applied Physics. 89:5760-5768
In situ monitoring of catalyst nickel atoms by laser induced fluorescence during carbon nanotube formation in a laser-produced plume was performed at the Johnson Space Center nanotube production laboratory. The results indicate that ablation of nicke
Publikováno v:
Applied Physics A Materials Science & Processing. 72:573-580
Mechanisms proposed in the literature are compared with a current scenario for the formation of single-wall carbon nanotubes in the laser-ablation process that is based on our spectral emission and laser-induced fluorescence measurements. It is sugge
Autor:
Carl D. Scott, Irina G. Brykina
Publikováno v:
Fluid Dynamics. 36:303-311
An effective approximate technique for calculating heat transfer, viscous stress, and species components on the windward side of three-dimensional bodies at incidence in hypersonic flow is developed. Using the similarity method, the solution of the t
Publikováno v:
Chemical Physics Letters. 320:26-34
Spectral and transient emission measurements are made of radiation from products of laser excitation of buckminsterfullerene (C60) vapor diluted in argon at 973 K. The principal radiation is from the Swan band system of C2 and, at early times, also f
Publikováno v:
Applied Physics A: Materials Science & Processing. 70:125-133
This paper presents diagnostic data obtained from the plume of a graphite composite target during carbon nanotube production by the double-pulse laser oven method. The insitu emission spectrum (300 to 650 nm) is recorded at different locations upstre