Sunday, January 22, 2012

US Patent 8097233 - Synthesis of nanoparticles by laser pyrolysis

This patent teaches a laser pyrolysis manufacturing method of nanoparticles which is suggested to provide the advantages of more uniform nanoparticle sizes with a higher hourly yield. Claim 1 reads:

1. A method for synthesizing nanoparticles by laser pyrolysis, in which at least one precursor interacts, in the vapor phase, with a laser beam in a pyrolysis reactor to produce nanoparticles, wherein the precursor is:

first in the liquid phase, then, converted to the vapor phase in an evaporator, before injection into the reactor, and

wherein a flow rate of the precursor in the liquid phase is controlled for continuous injection into the reactor,

wherein the precursor in the liquid phase has a flow rate that is substantially continuous and controlled by a mass flow controller.