Measuring and testing – Testing of material
Reexamination Certificate
2005-11-08
2005-11-08
Williams, Hezron (Department: 2856)
Measuring and testing
Testing of material
Reexamination Certificate
active
06962092
ABSTRACT:
The present invention is directed to at least one method and at least one apparatus for determining the length of single-wall carbon nanotubes (SWNTs). The method generally comprises the steps of: dispersing a sample of SWNTs into a suitable dispersing medium to form a solvent-suspension of solvent-suspended SWNTs; determining the mean SWNT diameter of the solvent-suspended SWNTs; introducing the solvent-suspended SWNTs into a viscosity-measuring device; obtaining a specific viscosity for the SWNT solvent-suspension; and determining the length of the SWNTs based upon the specific viscosity by solving, for example, the Kirkwood-Auer equation corrected by Batchelor's formula for the drag on a slender cylinder for “L,” to determine the length of the SWNTs. The apparatus generally comprises: a SWNT sample introduction mechanism; a dispersal chamber; a SWNT radius-determination chamber; and a viscosity determining chamber, wherein the SWNT sample introduction mechanism, the dispersal chamber, the SWNT radius-determination chamber, and the viscosity determination chamber are each operatively connected to at least one of the others.
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Davis Virginia A.
Hauge Robert H.
Parra-Vasquez A. Nicholas G.
Pasquali Matteo
Stepanek-Basset Ingrid
Bellamy Tamiko
Garsson Ross Spencer
Mickelson Edward T.
William Marsh Rice University
Williams Hezron
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