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US 8,790,440 B2Granted
Forming spherical semiconductive nanoparticles
AssigneeRaytheon Company
InventorKalin Spariosu
Life of this patent
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Abstract
In certain embodiments, a material comprising one or more semiconductive substances is vaporized to generate a vapor phase condensate. The vapor phase condensate is allowed to form nanoparticles. The nanoparticles are annealed to yield substantially spherical nanoparticles.
Claims6
A method of making spherical quantum dots, the method comprising:
- feeding a material onto a heater element to vaporize the material, the material comprising one or more semiconductive substances;
- allowing the vaporized material to flow upwardly from the heater element under free convection;
- injecting a flow of quenchant gas upwardly from a position below the heater element, parallel to and into contact with the upward flow of the vaporized material and at the same speed as the vaporized material;
- allowing the quenchant gas and vaporized material to thermally interact to allow the material to condense out of the vapor to form a plurality of nanoparticles;
- and
- annealing the nanoparticles to yield a plurality of substantially spherical quantum dots.
3 more elements
Dependencies are inferred from the claim text.