Method for cleaning nanomorphic carbon species

Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon

Reexamination Certificate

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C209S001000, C423S461000

Reexamination Certificate

active

07037479

ABSTRACT:
An exemplary method for substantially non-chemically-reactive separation of nanomorphic carbon species (140) comprises inter alia the steps of suspending a nanomorphic carbon sample (100) in an aqueous surfactant suspension (110), adding nanoparticles to the sample suspension (115), sonicating the sample (120), centrifugating the sample suspension (125) and decanting off the resulting supernatant (130). Disclosed features and specifications may be variously controlled, adapted or otherwise optionally modified to improve carbon nanospecies purification. An exemplary embodiment of the present invention representatively provides for non-oxidative cleaning of carbon nanotubes via at least partial removal of amorphous carbon contaminants.

REFERENCES:
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Bonard, J. ET Al., “Purification and size selection of carbon nanotubes,” Advanced Materials, 1997,pp. 827-831, vol. 9, No. 10.
O'Connell M. ET AL, “Band gap fluroescence from individual single-walled carbon nanotubes,” Science, Jul. 26, 2002, pp. 593-596, vol. 297.
Tarasov, B. ET Al., “Synthesis of carbon nanostructures by arc evaporation of graphite rods with Co-Ni and Yni2 catalysts,” Carbon, 2003, pp. 1357-1364, vol. 41.
Thien-Nga L.ET AL., “Mechanical purification of single-walled carbon nanotube bundles from catalytic particles,” Nano Letters, 2002, pp. 1349-1352, vol. 2, No. 12.
Duesberg, G.S. ET AL., “Towards processing of carbon nanotubes for technical applications,” Applied Physics A, 1999, pp. 269-274, vol. 69.

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