Electronic detection of dielectrophoretic forces exerted on particles flowing over interdigitated electrodes

A Calculation of The.viscous Force Exerted by a Flowing Fluid on a Dense Swarm of Particles

A calculation is given of the viscous force, exerted by a flowing fluid o11 a dense swarm of particles. The model underlying these calculations is tha t of a spherical particle embedded in a porous mass. The flow through this porous mass is decribed by a modification of D a r c y 's equation. Such a modification was necessa'ry in order to obtain consistent boundary conditions. A relation betwee...

Analytical solutions of ac electrokinetics in interdigitated electrode arrays: electric field, dielectrophoretic and traveling-wave dielectrophoretic forces.

Analysis of the movement of particles in a nonuniform field requires accurate knowledge of the electric field distribution in the system. This paper describes a method for analytically solving the electric field distribution above interdigitated electrode arrays used for dielectrophoresis (DEP) and traveling wave dielectrophoresis (twDEP), using the Schwarz-Christoffel mapping method. The elect...

Contractile cell forces exerted on rigid substrates.

Adhesive cells including fibroblasts produce contractile forces to the underlying substrate for their locomotion. Such forces are not only high enough to deform compliant membranes such as silicone but also bend rigid micro-cantilevers. The cell-induced bending of silicon micro-cantilevers was determined using laser deflection during trypsin treatment. The observed cantilever relaxation corresp...

Immunosensors Based on Interdigitated Electrodes for the Detection and Quantification of Pesticides in Food

Polysilicon Interdigitated Electrodes as Impedimetric Sensors

The suitability of polysilicon as a material for the fabrication of interdigitated electrodes and their application to the development of sensors is studied in this work. The main interest in using this material lies in the possibility of obtaining integrated sensors with commercial CMOS technologies and simple post-processing steps. Electrodes with 3μm finger width and 3, 10, and 20μm spacing ...