Method for producing encapsulated nanoparticles and carbon nanotubes using catalytic disproportionation of carbon monoxide and the nanoencapsulates and nanotubes formed thereby
AssigneeArizona Board of Regents on Behalf of the University of Arizona
InventorsPeter E. Nolan, Andrew H. Cutler, David G. Lynch
Life of this patent
Estimating the term…
Abstract
A method for the production of carbon encapsulated nanoparticles, carbon nanotubes and other closed carbon structures, including contacting a catalyst of a transition metal, or a compound or alloy thereof, with a gas mixture containing carbon monoxide, and an amount of available molecular hydrogen which is insufficient to cause formation of graphite plane edges through capping, at a temperature in the range from 300-1000.degree. C., to provide closed carbon structures, which are useful in the preparation of thermal composites, reinforcement composites and magnetic particle recording media.
Claims7
A thermal composite comprising:
- a semiconductor component and a heat sink substrate;
- and
- an adhesive layer adhering said semiconductor component to said heat sink substrate, wherein said adhesive layer contains an adhesive and closed carbon nanotubes;
- wherein said closed carbon nanotubes provide a thermal bridge between said semiconductor component and said heat sink substrate.
In a metal particle recording medium having a substrate onto which magnetic metal particles are adhered, the improvement comprising coating the magnetic metal particles with a closed shell of carbon to provide carbon encapsulated magnetic metal nanoparticles having resistance to oxidation.
A closed carbon structure having no open graphite plane edges and graphite basal planes which are parallel and coplanar and optionally containing a particle of a transition metal therein.
Dependencies are inferred from the claim text.