Rapid flow fractionation of particles combining liquid and particulate dielectrophoresis
US7267752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2005 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Jul 26, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C5/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Rapid, size-based, deposition of particles from liquid suspension is accomplished using a nonuniform electric field created by coplanar microelectrode strips patterned on an insulating substrate. The scheme uses the dielectrophoretic force both to distribute aqueous liquid containing particles and, simultaneously, to separate the particles. Size-based separation is found within nanoliter droplets formed along the structure after voltage removal. Bioparticles or macromolecules of similar size can also be separated based on subtle differences in dielectric property, by controlling the frequency of the AC current supplied to the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.