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Particle separation

United States Patent

April 26, 2011
View the Complete Patent at the US Patent & Trademark Office
Embodiments of a method for selecting particles, such as based on their morphology, is disclosed. In a particular example, the particles are charged and acquire different amounts of charge, or have different charge distributions, based on their morphology. The particles are then sorted based on their flow properties. In a specific example, the particles are sorted using a differential mobility analyzer, which sorts particles, at least in part, based on their electrical mobility. Given a population of particles with similar electrical mobilities, the disclosed process can be used to sort particles based on the net charge carried by the particle, and thus, given the relationship between charge and morphology, separate the particles based on their morphology.
Moosmuller; Hans (Reno, NV), Chakrabarty; Rajan K. (Reno, NV), Arnott; W. Patrick (Reno, NV)
Board of Regents of the Nevada System of Higher Education, on behalf of the Desert Research Institute (Reno, NV), N/A (
12/ 165,511
June 30, 2008
STATEMENT OF GOVERNMENT SUPPORT This invention was made with United States Government support under grants from the U.S. Department of Energy Atmospheric Science Program, grants DE-FG02-05ER64008, DE-FG02-98ER62581, and DE-FG02-05ER63995; the National Air and Space Administration (NASA) Upper Atmosphere Research Program, contract NAG2-1462, and Atmospheric Chemistry Program contract NNH04CC09C; and the National Science Foundation, grant Nos. ATM-0212464, ATM-0525355, and 0447416. The United States Government has certain rights in the invention.