Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2011-01-04
2011-01-04
Vanoy, Timothy C (Department: 1793)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
C423S447200
Reexamination Certificate
active
07862793
ABSTRACT:
Methods by which the growth of a nanostructure may be precisely controlled by an electrical current are described here. In one embodiment, an interior nanostructure is grown to a predetermined geometry inside another nanostructure, which serves as a reaction chamber. The growth is effected by a catalytic agent loaded with feedstock for the interior nanostructure. Another embodiment allows a preexisting marginal quality nanostructure to be zone refined into a higher-quality nanostructure by driving a catalytic agent down a controlled length of the nanostructure with an electric current. In both embodiments, the speed of nanostructure formation is adjustable, and the growth may be stopped and restarted at will. The catalytic agent may be doped or undoped to produce semiconductor effects, and the bead may be removed via acid etching.
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Jensen Kenneth J.
Mickelson William E.
Zettl Alex K.
Guzman Leonard T.
Hou Michelle
Lawrence Berkeley National Laboratory
The Regents of the University of California
Vanoy Timothy C
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