Dielectrophoresis and Liquid Crystal Dielectrophoresis

submitted by: icamvid

Dielectrophoresis and Liquid Crystal Dielectrophoresis by Dr. Carl Brown, Nottingham Trent University

Conducting PDMS for cell manipulation

submitted by: lewp0002
Cells are the basic element in humans, animals and plants. As they are so tiny, the manipulation of these small matters is impossible with humans’ hands and we cannot even see them with bare eyes. In this video, I am going to bring you into a microfluidic device; the place where cells and particles can be manipulated by conducting PDMS. This is a simple PDMS-based microfluidic device with two inlets and two outlets. But what make it interesting is conducting PDMS electrodes embedded...

Electrokinetic Concentration and Separation of Particles in Microfluidic Reservoirs

submitted by: xcxuan
This video exhibits the selective concentration and separation of 3 um particles from 1 um particles in the upstream reservoir of a straight microchannel. This size-based particle sorting arises from the negative dielectrophoresis induced at the reservoir-microchannel junction where the size mismatch of the reservoir and microchannel creates strong inherent electric field gradients. Such reservoir-based dielectrophoretic sorting is superior to existing insulator-based dielectrophoresis...

Electrothermal Flow in Insulator-Based Dielectrophoresis

submitted by: xcxuan
In this video 600 nm fluorescent particles were used visualize the electroosmotic fluid flow in insulator-based dielectrophoresis devices. The interaction of Joule heating-induced fluid inhomogeneities and electric field causes electrothermal fluid circulations upstream and downstream the microchannel constriction. By varying the DC and AC field components, we observed different flow patterns in the constriction region due to the competition of electroosmotic flow and electrothermal flow.