Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2004-08-11
2008-08-19
Nguyen, Cam N. (Department: 1793)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C502S343000, C502S345000
Reexamination Certificate
active
07413725
ABSTRACT:
A method of making Cu, Zn, and/or Cu/Zn alloy nanoparticles subjects one or more targets to laser energy to form a vapor and condenses the vapor to form nanoparticles having an average particle size of less than 20 nm. The optional application of an electric field results in nanoparticles with aspect ratios greater than 1.0. The target(s) can be a single target or separate targets comprising a mixture of copper, zinc, and/or copper/zinc. When separate targets are used, the laser beam can be split to form two separate beams each of which is made incident upon one of the targets. The nanoparticles can be formed in a chamber having an inert atmosphere or a reactive atmosphere and a convection current is created in the chamber by maintaining the top plate at a lower temperature than the bottom plate.
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Deevi Sarojini
Deevi Seetharama C.
El-Shall M. Samy
Lilly, Jr. A. Clifton
Pithawalla Yezdi B.
Buchanan & Ingersoll & Rooney PC
Nguyen Cam N.
Philip Morris USA Inc.
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