Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2005-11-29
2009-08-25
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S708000, C210S737000, C210S738000, C210S774000, C210S787000, C210S806000, C209S001000, C423S460000, C423S461000, C204S450000, C977S750000, C977S845000, C977S847000
Reexamination Certificate
active
07578941
ABSTRACT:
The present invention is generally directed to new liquid-liquid extraction methods for the length-based separation of carbon nanotubes (CNTs) and other 1-dimensional nanostructures. In some embodiments, such methods are directed to separating SWNTs on the basis of their length, wherein such methods comprise the steps of: (a) functionalizing SWNTs to form functionalized SWNTs with ionizable functional moieties; (b) dissolving said functionalized SWNTs in a polar solvent to form a polar phase; (c) dissolving a substoichiometric (relative to the amount of ionizable functional moieties present on the SWNTs) amount of a phase transfer agent in a non-polar solvent to form a non-polar phase; (d) combining the polar and non-polar phases to form a bi-phase mixture; (e) adding a cationic donor species to the bi-phase mixture; and (f) agitating the bi-phase mixture to effect the preferential transport of short SWNTs into the non-polar phase such that the non-polar phase is enriched in short SWNTs and the polar phase is enriched in longer SWNTs. In other embodiments, analogous methods are used for the length-based separation of any type of CNT, and more generally, for any type of 1-dimensional nanostructure.
REFERENCES:
patent: 5374415 (1994-12-01), Alig et al.
patent: 6331262 (2001-12-01), Haddon et al.
patent: 7074310 (2006-07-01), Smalley et al.
patent: 7374649 (2008-05-01), Jagota et al.
patent: 7374685 (2008-05-01), Sun
patent: 2003/0168385 (2003-09-01), Papadimitrakopoulos
patent: 2005/0136638 (2005-06-01), Voss-Kehl et al.
patent: 2006/0115640 (2006-06-01), Yodh et al.
patent: 2008/0063587 (2008-03-01), Strano et al.
patent: WO 02/060812 (2002-08-01), None
patent: WO 2004/082794 (2004-09-01), None
patent: WO 2005/085132 (2005-09-01), None
Iijima, “Helical microtubules of graphitic carbon”, 354 Nature (1991), pp. 56-58.
Iijima et al., “Single-shell carbon nanotubes of 1-nm diameter”, 363 Nature (1993), pp. 603-605.
Bethune et al., “Cobalt-catalysed growth of carbon nanotubes with single-atomic-layer walls”, 363 Nature (1993), pp. 605-607.
Baughman et al., “Carbon Nanotubes—the Route Toward Applications”, 297 Science (2002), pp. 787-792.
Ebbesen, “Carbon Nanotubes”, 24 Annu. Rev. Mater. Sci. (1994), pp. 235-264.
Thess et al., “Crystalline Ropes of Metallic Carbon Nanotubes”, 273 Science (1996), pp. 483-487.
Vander Wal et al., “Flame synthesis of Fe catalyzed single-walled carbon nanotubes and Ni catalyzed nanofibers . . . ” 349 Chem. Phys. Lett. (2001), pp. 178-184.
Hafner et al., “Catalytic growth of single-wall carbon nanotubes from metal particles”, 296 Chem. Phys. Lett. (1998), pp. 195-202.
Cheng et al., Bulk morphology and diameter distribution of single-walled carbon nanotubes . . . , 289 Chem. Phys. Lett. (1998), pp. 602-610.
Nikolaev et al., “Gas-phase catayltic growth of single-walled carbon nanotubes from carbon monoxide”, 313 Chem. Phys. Lett. (1999), pp. 91-97.
Strano et al., “The Role of Surfactant Adsorption during Ultrasonication in the Dispersion of Single-Walled carbon nanotubes”, 3 J. Nanosci. and Nanotech. (2003), pp. 81-86.
O'Connell et al. “Reversible water-solubilization of single-walled carbon nanotubes by polymer wrapping”, 342 Chem. Phys. Lett. (2001), pp. 265-271.
Liu et al., “Fullerene Pipes”, 280 Science (1998), pp. 1253-1256.
Chen et al., “Solution Properties of Single-Walled Carbon Nanotubes”, 282 Science (1998), pp. 95-98.
Khabashesku et al., “Fluorination of Single-Walled Carbon Nanotubes and Subsequent Derivatization Reactions”, 35 Acc. Chem. Res. (2002), pp. 1087-1095.
Holzinger et al., “Sidewall Functionalization of Carbon Nanotubes”, 40 Angew. Chem. Int. Ed. (2001), pp. 4002-4005.
Ying et al., “Functionalization of Carbon Nanotubes by Free Radicals” 5 Org. Letters 9 (2003), pp. 1471-1473.
Bahr et al., “Functionalization of Carbon nanotubes by Electrochemical reduction of Aryl Diazonium Salts: A Bucky Paper Electrode” 123 J. Am. Chem. Soc. (2001), pp. 6536-6542.
Kamaras et al., “Covalent Bond Formation to a Carbon Nanotube Metal”, 301 Science (2003), p. 1501.
Gu et al., “Cutting Single-Wall Carbon nanotubes through Fluorination”, 2 Nano Lett. 9 (2002), pp. 1009-1013.
Ziegler et al., “Controlled Oxidative Cutting of Single-Walled Carbon Nanotubes”, 127 J. Am. Chem. Soc. (2005), pp. 1541-1547.
Heller et al., “Concomitant Length and Diameter Separation of Single-Walled Carbon Nanotubes”, 126 J. Am Chem. Soc. (2004), pp. 14567-14573.
Hudson et al., “Water-Soluble, Exfoliated, Nonroping Single-Wall Carbon Nanotubes”, 126 J. Am. Chem. Soc. (2004), pp. 11158-11159.
Ziegler et al., “Length-Dependent Extraction of Single-Walled Carbon Nanotubes,” Nano Lett. (in press), DOI: 10.1021
l0510208, (2005), pp. 2355-2359.
Hauge Robert H.
Marek, legal representative Irene Morin
Schmidt Daniel J.
Smalley Richard E.
Ziegler Kirk J.
Drodge Joseph W
William Marsh Rice University
Winstead PC
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