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AssigneeNorthwestern University
InventorsD. Lynn Johnson, Vinayak P. Dravid, Mao-Hua Teng, Jonathon J. Host, Jinha Hwang, Brian R. Elliott
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Method and apparatus for making nanoparticles of a material having a diameter of 100 nanometers or less wherein the material to be formed into nanoparticles is evaporated to form a vapor plume therein, a non-reactive entrainment gaseous atmosphere suitable for evaporation conditions is introduced to a first chamber, a gaseous jet is directed through the vapor plume in a direction to carry nanoparticles formed by quenching of the vapor plume through a flow restriction orifice between the first chamber and a second chamber downstream of the first chamber, recirculation of the gaseous jet and nanoparticles entrained therein from the second chamber to the first chamber is substantially prevented to thereby provide a second stage of the gaseous jet downstream of the orifice and substantially isolated from said first chamber for flow to the second chamber, and collecting the nanoparticles from the second stage of said gaseous jet in a collection chamber downstream from the orifice. The nanoparticles can be reacted in an aerosol reactor chamber located downstream of the orifice under a variety of reaction conditions without adversely affecting the evaporation conditons present in the first chamber.
Method of making nanoparticles of a material, comprising directing a gaseous jet in a first chamber in a direction to carry nanoparticles through a flow restriction orifice between said first chamber and a second chamber downstream of said first chamber in a manner to provide a second stage of said gaseous jet downstream of said orifice and substantially isolated from said first chamber for flow to said second chamber, and collecting said nanoparticles from said second stage of said gaseous jet downstream from said orifice.
Method of making nanoparticles of a material, comprising directing a gaseous jet in a first chamber in a direction to carry nanoparticles through a flow restriction orifice between said first chamber and a second chamber downstream of said first chamber, introducing an entrainment gaseous atmosphere to said first chamber, substantially avoiding recirculation of said gaseous jet and nanoparticles entrained therein from said second chamber to said first chamber effective to thereby provide a second stage of said gaseous jet downstream of said orifice and substantially isolated from said first chamber for flow to said second chamber, and collecting said nanoparticles from said second stage of said gaseous jet downstream from said orifice.
Apparatus for forming nanoparticles of a material, comprising means in a first chamber for directing a gaseous jet in a direction to carry nanoparticles through a flow restriction orifice between said first chamber and a second chamber downstream of said first chamber in a manner to provide a second stage of said gaseous jet downstream of said orifice and substantially isolated from said first chamber for flow to said second chamber, and means downstream from said orifice for collecting said nanoparticles from said second stage of said gaseous jet.
Apparatus for forming nanoparticles of a material, comprising means in a first chamber for directing a gaseous jet in a direction to carry nanoparticles through a flow restriction orifice between said first chamber and a second chamber downstream of said first chamber, means for introducing an entrainment gaseous atmosphere to said first chamber, and means for controlling flow rates of said entrainment gaseous atmosphere and said gaseous jet in a manner that substantially avoids recirculation of said gaseous jet and nanoparticles entrained therein from said second chamber to said first chamber to provide a second stage of said gaseous jet downstream of said orifice and substantially isolated from said first chamber for flow to said second chamber, and means downstream from said orifice for collecting said nanoparticles from said second stage of said gaseous jet.
Dependencies are inferred from the claim text.