Method for producing encapsulated nanoparticles and carbon nanotubes using catalytic disproportionation of carbon monoxide and the nanoencapsulates and nanotubes formed thereby
First Claim
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1. 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.
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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° C., to provide closed carbon structures, which are useful in the preparation of thermal composites, reinforcement composites and magnetic particle recording media.
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7 Claims
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1. A thermal composite comprising:
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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. - View Dependent Claims (2)
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- 3. 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.
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7. 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.
Specification