Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2007-08-28
2007-08-28
Hendrickson, Stuart L. (Department: 1754)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
C423S447200, C423S447300, C977S742000, C977S843000
Reexamination Certificate
active
10261366
ABSTRACT:
A simple method for the production or synthesis of carbon nanotubes as free-standing films or nanotube mats by the thermal decomposition of transition metal complexed alkynes with aryl, alkyl, alkenyl, or alkynyl substituents. In particular, transition metal (e.g. Co, Ni, Fe, Mo) complexes of diarylacetylenes, e.g. diphenylacetylene, and solid mixtures of these complexes with suitable, additional carbon sources are heated in a vessel. More specifically, the heating of the transition metal complex is completed at a temperature between 400-800° C. and more particularly 550-700° C. for between 0.1 to 24 hours and more particularly 0.5-3 hours in a sealed vessel under a partial pressure of argon or helium.
REFERENCES:
patent: 5695734 (1997-12-01), Ikazaki et al.
patent: 6835330 (2004-12-01), Nishino et al.
Satishkumar, B. C. et al., ‘Single-Walled Nanotubes by the Pyrolysis of Acetylene-Organometallic Mixtures’ (Aug. 21, 1998), Elsevier, Chemical Physics Letters 293, pp. 47-52.
Iyer Vivekanantan S.
Vollhardt K. Peter C.
Berkeley Lawrence
Caron R'Sue P.
Hendrickson Stuart L.
McCracken Daniel C.
National Laboratory
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