Dielectrophoretic columnar focusing device
US7713395B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2006 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Nov 10, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C5/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dielectrophoretic columnar focusing device uses interdigitated microelectrodes to provide a spatially non-uniform electric field in a fluid that generates a dipole within particles in the fluid. The electric field causes the particles to either be attracted to or repelled from regions where the electric field gradient is large, depending on whether the particles are more or less polarizable than the fluid. The particles can thereby be forced into well defined stable paths along the interdigitated microelectrodes. The device can be used for flow cytometry, particle control, and other process applications, including cell counting or other types of particle counting, and for separations in material control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.